Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications最新文献_第9页

Metallurgical, mechanical, and corrosion behavior of AISI 304L joints welded using variable arc energy inputs and subjected to thermal aging 使用可变电弧能量输入焊接并经过热时效处理的 AISI 304L 接头的冶金、机械和腐蚀行为

IF 2.4 4区材料科学

Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications Pub Date : 2024-03-11 DOI: 10.1177/14644207241238200

Subodh Kumar, Amandeep S Shahi, Varun Sharma, Dikshant Malhotra

{"title":"Metallurgical, mechanical, and corrosion behavior of AISI 304L joints welded using variable arc energy inputs and subjected to thermal aging","authors":"Subodh Kumar, Amandeep S Shahi, Varun Sharma, Dikshant Malhotra","doi":"10.1177/14644207241238200","DOIUrl":"https://doi.org/10.1177/14644207241238200","url":null,"abstract":"The effect of three levels of welding arc energy input on the metallurgical, mechanical, and corrosion behavior of AISI 304L stainless steel was studied with the aim of investigating and recommending the most useful range of process parameters for improved performance of engineering structures made from this industrially important alloy. The gas tungsten arc welding process was employed, and all the joints were butt-welded using a single-V groove design. With an increase in heat input, the δ-ferrite phase changed from lathy to vermicular, besides the heat-affected zones of all the welds exhibiting grain coarsening effects. Postweld thermal aging led to the preferential occurrence of carbides in the interdendritic regions, which degraded their corrosion performance. Thermal aging did not affect the tensile strength of these welds, but their ductility was significantly impacted. The extent of segregation of Cr and C, especially, was observed to be the least in the case of low heat input welds. This study establishes that while designing welding procedures for AISI 304L structures, low welding arc energy should be used as it promotes better mechanical as well as corrosion properties.","PeriodicalId":20630,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications","volume":"39 1","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140106546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Adapting a phenomenological model for predicting acoustical behaviour of Camellia sinensis/Ananas comosus/E-glass fibre-blended epoxy hybrid composites 采用现象学模型预测山茶/桔梗/玻璃纤维混合环氧树脂混合复合材料的声学特性

IF 2.4 4区材料科学

Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications Pub Date : 2024-03-08 DOI: 10.1177/14644207241237736

Gokulkumar Sivanantham, Thyla Pudukarai Ramaswamy, Sathish Selvaraj, Aravindh Murugan, Felix Sahayaraj Arockiasamy, Sasi Kumar Mani, Md. Elias Uddin

{"title":"Adapting a phenomenological model for predicting acoustical behaviour of Camellia sinensis/Ananas comosus/E-glass fibre-blended epoxy hybrid composites","authors":"Gokulkumar Sivanantham, Thyla Pudukarai Ramaswamy, Sathish Selvaraj, Aravindh Murugan, Felix Sahayaraj Arockiasamy, Sasi Kumar Mani, Md. Elias Uddin","doi":"10.1177/14644207241237736","DOIUrl":"https://doi.org/10.1177/14644207241237736","url":null,"abstract":"Developing a hybrid phenomenological model for predicting the sound absorption coefficient of a pineapple leaf fibre/waste tea leaf fibre/glass fibre/epoxy-based natural fibre-reinforced hybrid composites is the predominant topic of this article. Phenomenological models excel at extrapolating characteristic impedance and wave number whereas empirical models require fewer inputs but overlook wave propagation in pores. Existing models apply only to single-fibre-reinforced composites, necessitating the creation of a hybrid model for hybrid composites. The developed hybrid Zwikker–Kosten and Johnson–Champoux–Allard model shows good agreement with experimental data across the frequency range, with standard deviations of 0.001–0.029 and percent deviations of 1.11%–11.43%. The overall noise reduction coefficient between the model and experiments is 0.31 vs. 0.30, with a 3.33% deviation. Furthermore, the application of alkali treatment increased the surface roughness which in turn, enhanced the sound absorption capabilities of these composites. The increased fibre roughness also amplified friction between fibres and sound waves, resulting in higher sound absorption coefficients. In addition, X-ray diffraction, thermal stability (thermogravimetric analysis and differential scanning calorimetry), and scanning electron microscopy examinations were performed on the designated composition (5% by weight of pineapple leaf fibre and 25% by weight of waste tea leaf fibre) of the pineapple leaf fibre/waste tea leaf fibre/glass fibre/epoxy-based natural fibre-reinforced hybrid composite.","PeriodicalId":20630,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications","volume":"275 1","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140070113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of overlapping friction stir processing on microstructural evolution, texture development, and mechanical performance in Al6061 重叠摩擦搅拌加工对 Al6061 中微结构演变、纹理发展和机械性能的影响

IF 2.4 4区材料科学

Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications Pub Date : 2024-03-08 DOI: 10.1177/14644207241235385

Marukurti VNV Satyanarayana, Begari Vijayakrishna, Mukuloth Srinivasnaik, Rajani K. Kolagotla, Durga V. Janaki, Putta Prakash

{"title":"Influence of overlapping friction stir processing on microstructural evolution, texture development, and mechanical performance in Al6061","authors":"Marukurti VNV Satyanarayana, Begari Vijayakrishna, Mukuloth Srinivasnaik, Rajani K. Kolagotla, Durga V. Janaki, Putta Prakash","doi":"10.1177/14644207241235385","DOIUrl":"https://doi.org/10.1177/14644207241235385","url":null,"abstract":"In the current examination, a large-area stirred zone has been created in Al6061 through the application of overlapping friction stir processing. The investigation focused on examining the microstructural and texture changes in friction stir processed Al6061, using the electron backscattered diffraction technique. Electron backscattered diffraction images provided valuable insights into the recrystallization process, revealing the presence of fine-grained structure with high-angle boundaries in the large-area stirred zone attributed to intense plastic straining and dynamic recrystallization. The use of the tool caused significant plastic straining, resulting in the development of the A- (1 1 1) {1 1 0} texture component. Mechanical testing demonstrated a noteworthy increase in ductility after processing. However, the microhardness and strength were observed to be inferior to the base material due to elevated thermal cycling.","PeriodicalId":20630,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications","volume":"67 1","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140069914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preparation and characterization of biomass-ash composites derived from incinerated sewage sludge fly ash after hydrothermal treatment 焚烧污水污泥飞灰经水热处理后产生的生物质-灰复合材料的制备与表征

IF 2.4 4区材料科学

Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications Pub Date : 2024-03-08 DOI: 10.1177/14644207241233460

Yunqing Shi, Lingjun Wei, Hao Sun, Yiming Li, Jieyu Cui, Wanlu Zhang

{"title":"Preparation and characterization of biomass-ash composites derived from incinerated sewage sludge fly ash after hydrothermal treatment","authors":"Yunqing Shi, Lingjun Wei, Hao Sun, Yiming Li, Jieyu Cui, Wanlu Zhang","doi":"10.1177/14644207241233460","DOIUrl":"https://doi.org/10.1177/14644207241233460","url":null,"abstract":"With the increasing prominence of global environmental issues and the growing demand for sustainable development, biomass composites have attracted widespread attention as candidates for environmentally friendly and renewable construction materials. In this study, environmentally friendly biomass-ash composites (BACs) were fabricated using hydrothermally activated incinerated sewage sludge ash (HT-ISSA) as filler and straw powder with waste sawdust as the biomass matrix for hot pressing. An investigation was conducted into the effect of HT-ISSA on the physical properties of the composite, including the bending strength, compressive strength, and thermal conductivity. The composite prepared with 15 wt% HT-ISSA demonstrated an exceptionally high bending strength (30.60 MPa), compressive strength (44.76 MPa), and low thermal conductivity (0.2380 W/m·K). The enhanced physical properties of the BAC material are attributable to the change caused by hydrothermal treatment of the filler phase. Due to the introduction of hydrated calcium silicate, the cohesion performance of the filler significantly improved, thus leading to strong adhesion and penetration within the matrix. The obtained BAC is applicable for packaging and insulation materials, thus providing an effective solution for the economical and environmentally friendly recycling of incinerated sewage sludge ash and other bulk solid waste. Additionally, it contributes novel insights into alleviating the current shortage of forest resources.","PeriodicalId":20630,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications","volume":"63 1","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140069929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamic response optimization of the multistage sandwich structures imperiled to explosive loading 防爆多级夹层结构的动态响应优化

IF 2.4 4区材料科学

Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications Pub Date : 2024-03-08 DOI: 10.1177/14644207241238220

Murlidhar Patel, Shivdayal Patel

{"title":"Dynamic response optimization of the multistage sandwich structures imperiled to explosive loading","authors":"Murlidhar Patel, Shivdayal Patel","doi":"10.1177/14644207241238220","DOIUrl":"https://doi.org/10.1177/14644207241238220","url":null,"abstract":"Explosive attacks are increasing day by day in the present era, and the design optimization of protective structures without increasing their weight is mainly a critical task for vehicles. Assessment of the dynamic response of the structures under explosive loading through experimentation is costly, with many restrictions, and highly harmful for both people and the environment. Hence, the present study deals with an explicit numerical investigation of the protective sandwich structures’ blast performance. The influence of the number of stages of honeycomb on the sandwich structures’ blast mitigation capacity was evaluated with the effective utilization of face sheets’ material as their intermediate sheets while maintaining the total volumes as well as masses of the structure's constant. The explosive loads of 1 to 3 kg of trinitrotoluene were used for the stand-off distance of 100 mm. The rate-dependent Johnson-Cook plasticity model was implemented on the designed sandwich models to discover their damage behaviors. The sandwiches’ face deflection, energy absorption, kinetic energy variation, and crushing behaviors were considered to characterize their blast mitigation capacity. The obtained results showed that increasing the number of stages of core in the sandwich structure by using a fraction of the back face sheet materials for intermediate sheets significantly improved their blast performance without increasing their volume occupancies and masses. For the two-stage and three-stage sandwich designs, 50% and 20%, respectively, utilization of their back face material for their intermediate sheet was found to be optimal.","PeriodicalId":20630,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications","volume":"19 1","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140069933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Joining aluminum die castings and wrought aluminum by resistance spot welding 通过电阻点焊连接铝压铸件和锻造铝件

IF 2.4 4区材料科学

Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications Pub Date : 2024-03-06 DOI: 10.1177/14644207241236388

Maike Epperlein, Alexander Schiebahn, Uwe Reisgen

{"title":"Joining aluminum die castings and wrought aluminum by resistance spot welding","authors":"Maike Epperlein, Alexander Schiebahn, Uwe Reisgen","doi":"10.1177/14644207241236388","DOIUrl":"https://doi.org/10.1177/14644207241236388","url":null,"abstract":"Resistance spot welding (RSW) is an economic, robust welding process, which is easy to automate and widely used in automotive industry. In this work, the resistance spot weldability of die-cast aluminum alloys EN AC-AlSi7MnMg, EN AC-AlSi9Mn and EN AC-AlSi10MnMg-T6/T7 to wrought aluminum alloy EN AW-AlSi1MnMg-T6 is investigated when applying the standard welding profile as recommended in VDA 238-401 considering main challenges in welding aluminum die castings, for example, porosity and inhomogenities. Weldability is best for EN AC-AlSi10MnMg-T6/T7, but the results show limited applicability of VDA 238-401 in general, especially for high total sheet thicknesses, because of invalid electrode force favouring spatter formation and weld spot irregularites. Still, all spot welds between die castings and 2 mm wrought aluminum sheets reach the recommended shear tension forces for spot diameter dw of 5·√t (2 mm: 5.95 kN; 3 mm: 8.96 kN; according to DIN EN ISO 18595), although being afflicted with solidification porosity and liquation cracking. Gas porosity is not observed and solidification porosity is only found to be significant for weld spot failure when being located close to the joining level, which is observed at welding depths of approximately 50% into the wrought aluminum sheet. Here, a failure path across the nugget is found. Weld porosity apart from the joining level is less significant and failure path is found along the fusion line between nugget and wrought aluminum. Instead, hardness difference between nugget and HAZ is the main reason for weld spot failure. Although the applied welding current profile is not suited best for RSW of mixed joints between aluminium die castings and wrought aluminium alloys, the results confirm its potential, for example, a significantly reduced gas porosity compared to applied fusion welding processes.","PeriodicalId":20630,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications","volume":"52 1","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140057601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of bio nanofiller in influencing the carbon and E-glass fabric reinforced composites 生物纳米填料对碳纤维和 E 玻璃纤维增强复合材料的影响

IF 2.4 4区材料科学

Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications Pub Date : 2024-03-06 DOI: 10.1177/14644207241236903

Sasmita Kar, Saismita Behera, Sandeep Bhoi, Sarojrani Pattnaik, Mihir Kumar Sutar

{"title":"Effect of bio nanofiller in influencing the carbon and E-glass fabric reinforced composites","authors":"Sasmita Kar, Saismita Behera, Sandeep Bhoi, Sarojrani Pattnaik, Mihir Kumar Sutar","doi":"10.1177/14644207241236903","DOIUrl":"https://doi.org/10.1177/14644207241236903","url":null,"abstract":"The exceptional mechanical properties, dimensional stability and low cost of production of textile composites have made them quite popular in recent years. In the present analysis, plain woven inter, intra and hybrid carbon and E-glass fibre reinforced composites incorporated with or without nano-coconut shell ash (CSA) as filler were manufactured by hand lay-up method. The mechanical and thermal properties were determined for the manufactured composites. Simultaneously, the fractographic study was conducted by scanning electron microscopy to predict the different kind of failures in composites. The mechanical properties of the composites were found to be significantly better when 2 wt.% of CSA was substituted in it. The inter-hybrid composite containing 2 wt.% nanofiller demonstrated the highest tensile strength of 245.96 MPa, flexural strength of 496.03 MPa and maximum degradation temperature with weight change of 81.08%. A combination of intra- and inter-hybrid woven composite revealed the highest impact resistance of 3.3 J. The pseudo-ductile performance of intra-hybrid composites is also distinctly observed, showing moderate tensile stress of 299.376 MPa and maximum elongation of 5.137 mm. The current scientific effort makes it clear that the greatest tensile strength was obtained by positioning carbon fibres inside and the glass fibres outside. The surface proximity and diffusion of nanofillers in the composites further enhanced their tensile properties. Shear dispersion also led to maximum energy absorption without the need for nanofiller in case of combination of intra- and inter-woven fibre composites.","PeriodicalId":20630,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications","volume":"21 1","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140057492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental investigation of 3D printed bio-inspired Xylotus lattice structure for energy absorption under quasi-static axial loading conditions 准静态轴向加载条件下吸收能量的三维打印生物启发式 Xylotus 晶格结构的实验研究

IF 2.4 4区材料科学

Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications Pub Date : 2024-03-06 DOI: 10.1177/14644207241236856

R Ramakrishnan, J Hemanth Kumar, Franklin Titus, P Maharshi, R Nithish

{"title":"Experimental investigation of 3D printed bio-inspired Xylotus lattice structure for energy absorption under quasi-static axial loading conditions","authors":"R Ramakrishnan, J Hemanth Kumar, Franklin Titus, P Maharshi, R Nithish","doi":"10.1177/14644207241236856","DOIUrl":"https://doi.org/10.1177/14644207241236856","url":null,"abstract":"The demand for robust, lightweight polymer components in various industries has prompted researchers to turn to nature's structures for inspiration. Leveraging Polymer Additive Manufacturing (PAM), specifically Fused Filament Fabrication (FFF), complex bio-inspired lattice polymer structures have been successfully realized. This experimental study focuses on the development of novel 3D printed bioinspired Xylotus lattice structure with elements inspired by xylem and lotus. The primary goal was to evaluate the deformation behaviour and energy absorption characteristics of 3D printed Xylotus lattice structure under quasi-static compressive loading and compare the results with existing research. The hybrid (Xylotus) structure of xylem and lotus exhibited a sequential failure pattern, starting with axial cracks and followed by buckling. Furthermore, an analysis of energy absorption showed that the xylem lattice outperformed the lotus lattice, thanks to its robust tubular elements. Notably, the Xylotus lattice displayed the highest energy absorption capabilities, capitalizing on features from both lotus and xylem. The energy absorption of the Xylotus lattice structure surpassed that of the xylem and lotus structures by 13% and 29.2%, respectively. The xylotus lattice structure exhibited 38% higher energy absorption compared to the existing research. Moreover, the specific energy absorption of the Xylotus lattice structure outperformed the lattice structures reported in the existing research by 37%. This study offers valuable insights into the structural behaviour, energy absorption, and specific energy absorption of bio-inspired lattice Xylotus structure. The findings contribute significantly to the design of resilient, lightweight components, supporting the advancement of bio-inspired structures for diverse applications in various industries.","PeriodicalId":20630,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications","volume":"35 1","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140057595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of Ni and PWHT on microstructure evolution and mechanical properties of GTA-welded duplex stainless steel and super duplex stainless steel joints: A comparative investigation 镍和 PWHT 对 GTA 焊接双相不锈钢和超级双相不锈钢接头微观结构演变和机械性能的影响：对比研究

IF 2.4 4区材料科学

Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications Pub Date : 2024-03-05 DOI: 10.1177/14644207241236743

Mahmoud Abbasi, Behrouz Bagheri Vanani, Ali Tahaei, Gian Luca Garagnani

{"title":"Influence of Ni and PWHT on microstructure evolution and mechanical properties of GTA-welded duplex stainless steel and super duplex stainless steel joints: A comparative investigation","authors":"Mahmoud Abbasi, Behrouz Bagheri Vanani, Ali Tahaei, Gian Luca Garagnani","doi":"10.1177/14644207241236743","DOIUrl":"https://doi.org/10.1177/14644207241236743","url":null,"abstract":"In the present investigation, a new endeavor has been made to analyze the impact of the secondary process (post-weld heat treatment (PWHT)) as well as Ni addition on the microstructure and mechanical characteristics of welds. Welds between similar joining materials from duplex stainless steels (DSS), as well as super DSS (SDSS), were made by the gas tungsten arc welding (GTAW) process. For DSS, after PWHT with the addition of Ni element, the amount of austenite rises and becomes more uniformly distributed with curved boundaries, while for SDSS, the microstructure mainly consists of intergranular and Widmanstätten austenite. According to the comparison of phase percentages obtained based on both ASTM E1245 and ASTM E562, a good balance between ferrite and austenite phases of joint materials was achieved. X-ray diffraction analyses on both joints revealed that phases are mainly ferrite and austenite with different lattice parameters without evidence of unwanted intermetallic phases. The addition of Ni increases the hardness values of DSS weld metal compared to the base metal due to an increased amount of Widmanstätten austenite and ferrite in the microstructure. The lowest ductility was obtained for the SDSS weld sample with the addition of Ni and PWHT because of the existence of secondary austenite in the weld metal and the Widmanstätten morphology of the austenite. The effect of PWHT on the development of microstructure and mechanical behaviors was more than the effect of nickel powder on weld samples.","PeriodicalId":20630,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications","volume":"130 1","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140044533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A new deformable self-clinching fastener 新型可变形自锁紧固件

IF 2.4 4区材料科学

Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications Pub Date : 2024-03-01 DOI: 10.1177/14644207241236463

João PM Pragana, Rui FV Sampaio, Ricardo G Clara, Ivo MF Bragança, Carlos MA Silva, Paulo AF Martins

{"title":"A new deformable self-clinching fastener","authors":"João PM Pragana, Rui FV Sampaio, Ricardo G Clara, Ivo MF Bragança, Carlos MA Silva, Paulo AF Martins","doi":"10.1177/14644207241236463","DOIUrl":"https://doi.org/10.1177/14644207241236463","url":null,"abstract":"This work proposes a novel deformable self-clinching fastener for producing hidden lap joints suitable for both structural and electric power distribution applications. The fastener, characterized by an axisymmetric concave shape, is employed to fabricate hybrid busbar joints between electrically conductive strips of different materials and thicknesses. The self-clinching process with the new deformable fastener involves machining dovetail holes in both conductors and applying a squeezing force to the fastener to create a form-closed mechanical joint. The work encompasses both experimental investigations and numerical modeling using finite element analysis and is carried out on unit cells made from aluminum and copper conductors, which are representative of the joining process. The investigation evaluates force requirements, conducts destructive testing, and performs thermo-electric characterization of the new joints to conclude on the suitability of the new deformable self-clinching fastener for electric power distribution applications. Results indicate that while copper fasteners necessitate greater squeezing forces, they offer superior mechanical and thermo-electrical performance compared to aluminum fasteners in hybrid busbar joints.","PeriodicalId":20630,"journal":{"name":"Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications","volume":"82 1","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140019594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0