Materials & Design最新文献_第7页

Assessing the fracture toughness in Tungsten-based nanocomposites: A micro-mechanical approach 评估钨基纳米复合材料的断裂韧性：微机械方法

IF 7.6 2区材料科学

Materials & Design Pub Date : 2024-11-01 DOI: 10.1016/j.matdes.2024.113433

K. Schmuck, M. Burtscher, M. Alfreider, D. Kiener

{"title":"Assessing the fracture toughness in Tungsten-based nanocomposites: A micro-mechanical approach","authors":"K. Schmuck, M. Burtscher, M. Alfreider, D. Kiener","doi":"10.1016/j.matdes.2024.113433","DOIUrl":"10.1016/j.matdes.2024.113433","url":null,"abstract":"<div><div>Nanocrystalline tungsten-copper composites can favorably combine the outstanding material properties of both elements. This work investigates tungsten-copper composites fabricated from elemental powders with 80 wt.% tungsten and either copper or <span><math><mrow><mi>α</mi></mrow></math></span>-brass containing 20 wt.% zinc, respectively. Moreover, high-pressure torsion is used to compact the powders, strengthen the resulting composite by grain refinement, and tailor the grain-size in the nanocrystalline regime by varying the deformation temperature between RT, 400°C and 550°C, resulting in grain-sizes of 9 nm 14 nm and 28nm, respectively. Hardness measurements revealed a transition from normal to inverse Hall-Petch behavior for grain-sizes below 11 nm. To examine the fracture properties, micro-cantilever bending beams with a cross-section of 10x10µm<sup>2</sup> were fabricated. Evaluation of these experiments indicated a fracture toughness of 3 MPa<span><math><mrow><msqrt><mrow><mi>m</mi></mrow></msqrt></mrow></math></span>. The slight decrease of fracture toughness between a grain-size of 9 nm to 14 nm indicates a reduction of the grain boundary cohesion strength. The grain-size increase to 28nm reversed the trend in fracture toughness and raised it to 3.4MPa<span><math><mrow><msqrt><mrow><mi>m</mi></mrow></msqrt></mrow></math></span>, which points to activating additional deformation mechanisms, such as dislocation-accumulation and twinning. Additionally, alloying with zinc raised the composites strength and retained the composites fracture toughness, benefiting the damage tolerance.</div></div>","PeriodicalId":383,"journal":{"name":"Materials & Design","volume":"247 ","pages":"Article 113433"},"PeriodicalIF":7.6,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142651855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hybrid manufacturing and performance evaluation of β Ti-alloy stents β钛合金支架的混合制造和性能评估

IF 7.6 2区材料科学

Materials & Design Pub Date : 2024-11-01 DOI: 10.1016/j.matdes.2024.113420

Peter Ibrahim , Rebecca Garrard , Pavel Penchev , Kenny Man , Sophie C. Cox , Stefan Dimov , Moataz M. Attallah

{"title":"Hybrid manufacturing and performance evaluation of β Ti-alloy stents","authors":"Peter Ibrahim , Rebecca Garrard , Pavel Penchev , Kenny Man , Sophie C. Cox , Stefan Dimov , Moataz M. Attallah","doi":"10.1016/j.matdes.2024.113420","DOIUrl":"10.1016/j.matdes.2024.113420","url":null,"abstract":"<div><div>Biomedical β Ti-alloys possess an interesting combination of mechanical properties, including an elastic modulus lower than 60 GPa. In this study, a hybrid manufacturing route for Ti-34Nb-13Ta-5Zr-0.3O (TNTZO) alloy stents was developed and assessed. The route involves using Laser Powder Bed Fusion (L-PBF) to manufacture thin-walled tubes, which are then laser micro-machined to directly produce customised stents, cutting short the laborious process and overcome the design limitations for stents manufacturing. Different post processing techniques were used to improve the surface finish and cell attachment properties of the tubes. Finite Element (FE) modelling was used to simulate stent crimping and deployment. The study identified the key parameters that control the performance of the final product, including the optimum laser scanning strategies during L-PBF to achieve smooth thin-walled tubes, and the use of electropolishing to improve the surface finish and cell attachment. FE simulations showed that TNTZO can achieve crimping ranges up to 74% following the optimisation of the strut diameter, which brings us one step closer to a Ni-free alternative to nitinol in manufacturing stents that require significant deformation.</div></div>","PeriodicalId":383,"journal":{"name":"Materials & Design","volume":"247 ","pages":"Article 113420"},"PeriodicalIF":7.6,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142578461","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Direct imaging of gas atomization process accompanying surface oxidation of tin droplets 伴随锡滴表面氧化的气体雾化过程的直接成像

IF 7.6 2区材料科学

Materials & Design Pub Date : 2024-11-01 DOI: 10.1016/j.matdes.2024.113413

Taiko Tanimoto , Nao Uchida , Mengjia Ren , Zhenying Wang , Chihiro Inoue , Jun Horiuchi , Takuya Takashita , Kazutoyo Yamada , Noriharu Yodoshi

{"title":"Direct imaging of gas atomization process accompanying surface oxidation of tin droplets","authors":"Taiko Tanimoto , Nao Uchida , Mengjia Ren , Zhenying Wang , Chihiro Inoue , Jun Horiuchi , Takuya Takashita , Kazutoyo Yamada , Noriharu Yodoshi","doi":"10.1016/j.matdes.2024.113413","DOIUrl":"10.1016/j.matdes.2024.113413","url":null,"abstract":"<div><div>Fine metal particles produced by gas atomization are recognized as an essential material for additive manufacturing. However, spatio-temporally resolved images for the atomization process are still lacking. In the present study, we apply a high-speed Schlieren optical system synchronized with a pulse light source with flashing period of 30 ns to a simple atomization setup, consisting of a single supersonic <figure><img></figure> jet at Mach number of 1.5 and free-falling tin droplets. Covering the tin droplets by Ar gas, we generate spherical droplets by minimizing the initial oxidation from the ambient. Impinging on the large-momentum gas jet, the tin droplet largely deforms to be shaved the bottom end and bounced above the jet with partially penetrating inside the gas core. The spreading ligaments above the jet thins at first along with the capillary timescale. As the surface oxidation proceeds, the neck transitionally shrinks according to the viscous-capillary timescale, which evidences the direct observation of gas atomization process superposed by the molecular diffusion across the interface. Statistics of collected metal particles demonstrate a bimodal distribution for the diameter, originated from the distinct atomization mechanisms of aerodynamic dominant breakup inside the gas jet and of capillary dominant breakup spreading above the jet.</div></div>","PeriodicalId":383,"journal":{"name":"Materials & Design","volume":"247 ","pages":"Article 113413"},"PeriodicalIF":7.6,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142560859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Screen-printing high/low resistance using only a single silver nanowire ink: Resistance-gradient metasurface application for broadband microwave absorption and optical transparency 仅使用单一银纳米线油墨就能丝网印刷出高/低电阻：用于宽带微波吸收和光学透明的电阻梯度元表面应用

IF 7.6 2区材料科学

Materials & Design Pub Date : 2024-11-01 DOI: 10.1016/j.matdes.2024.113451

Junghyeon Kim , Prabhakar Jepiti , Minjae Lee , Eiyong Park , Ratanak Phon , Sungjoon Lim

{"title":"Screen-printing high/low resistance using only a single silver nanowire ink: Resistance-gradient metasurface application for broadband microwave absorption and optical transparency","authors":"Junghyeon Kim , Prabhakar Jepiti , Minjae Lee , Eiyong Park , Ratanak Phon , Sungjoon Lim","doi":"10.1016/j.matdes.2024.113451","DOIUrl":"10.1016/j.matdes.2024.113451","url":null,"abstract":"<div><div>Transparent metasurface absorbers are highly sought after for their diverse applications, but achieving broad absorption bandwidths without sacrificing optical transparency remains a challenge. Traditionally, enhancing absorption involves increasing substrate thickness, which reduces transmittance. We address this by introducing a resistance-gradient metasurface (RGM) that combines broad absorption with high optical transparency. Unlike conventional methods requiring various inks for different resistances, our approach uses a single silver nanowire ink and screen-printing to create multiple resistances. This technique allows for flexible design and multiple resonances within the metasurface, achieving broad absorption even with a thin substrate. The RGM demonstrates an absorption bandwidth from 8.68 to 11.48 GHz with a substrate thickness of just 0.045 λ<sub>0</sub>, and optical transmittance of 66.3 % at 550 nm. This innovation promises to enhance both substrate efficiency and bandwidth in transparent metasurface absorbers, broadening their application potential in advanced devices.</div></div>","PeriodicalId":383,"journal":{"name":"Materials & Design","volume":"247 ","pages":"Article 113451"},"PeriodicalIF":7.6,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142651825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ply-ply friction behavior between unidirectional thermoplastic prepreg plies during thermoforming: Characterization and modeling 热成型过程中单向热塑性预浸料层间的摩擦行为：表征和建模

IF 7.6 2区材料科学

Materials & Design Pub Date : 2024-11-01 DOI: 10.1016/j.matdes.2024.113426

Wenwu Zhang , Lidong Wang , Xiongqi Peng

{"title":"Ply-ply friction behavior between unidirectional thermoplastic prepreg plies during thermoforming: Characterization and modeling","authors":"Wenwu Zhang , Lidong Wang , Xiongqi Peng","doi":"10.1016/j.matdes.2024.113426","DOIUrl":"10.1016/j.matdes.2024.113426","url":null,"abstract":"<div><div>The ply-ply friction behavior of unidirectional carbon fiber reinforced polyphenylene sulfide (UD CF/PPS) prepreg in thermoforming was investigated through an improved pull-through testing system. The effects of temperature, normal force and slipping velocity were considered in testing. The results indicated the existence of three key mechanisms underlying slipping: namely the resin shear, fiber–fiber contact and fiber-resin interaction. A three-stage division of the experimental curve was proposed, and several factors were defined to establish a quantitative definition of the ply-ply friction behavior. The results showed that the influence of slipping velocity is particularly evident. Its post-yield stress (12.8 kPa), steady-state CoF (0.118) and residual stress (0.705 kPa) were the highest, exhibiting the largest changes of 957.9 %, 736.9 % and 47.2 %, respectively. This indicated the strong contribution of resin in ply-ply friction. In addition, the Stribeck analysis also suggested the dominance of hydrodynamic lubrication condition in slipping. Based on the experimental results, a simple phenomenological model was proposed based on experimental curves to accurately describe the effects of processing parameters. This work presents a comprehensive characterization of the ply-ply friction behavior of UD CF/PPS prepreg in thermoforming, providing a substantial experimental foundation for the subsequent simulation research.</div></div>","PeriodicalId":383,"journal":{"name":"Materials & Design","volume":"247 ","pages":"Article 113426"},"PeriodicalIF":7.6,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142651852","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrophoretic deposition of LiFePO4 and carbon black: A numerical study to explore longitudinal trends using Taguchi design 磷酸铁锂和炭黑的电泳沉积：利用田口设计探索纵向趋势的数值研究

IF 7.6 2区材料科学

Materials & Design Pub Date : 2024-11-01 DOI: 10.1016/j.matdes.2024.113446

Stefano Russo , Marzio Grasso , Jian Huang , Stevin S. Pramana , Francesco Gucci , Christopher Shaw , Glenn J. Leighton

{"title":"Electrophoretic deposition of LiFePO4 and carbon black: A numerical study to explore longitudinal trends using Taguchi design","authors":"Stefano Russo , Marzio Grasso , Jian Huang , Stevin S. Pramana , Francesco Gucci , Christopher Shaw , Glenn J. Leighton","doi":"10.1016/j.matdes.2024.113446","DOIUrl":"10.1016/j.matdes.2024.113446","url":null,"abstract":"<div><div>Developing Electrophoretic Deposition (EPD) for Composite Structural Batteries (CSBs) could revolutionise energy storage technology. CSBs offer an innovative solution by seamlessly integrating batteries into structures and effectively reducing weight and space constraints. Despite its successful implementation across various fields, EPD method still lacks comprehensive understanding of the underlying physical and chemical processes due to the number of variables involved. In this study the effects of key parameters associated with the process are investigated with a coupled FEM and analytical approach to find correlations with the deposition process. A Taguchi Design of Experiment with five parameters, namely voltage, concentration, relative weight ratio of LiFePO<sub>4</sub> – carbon black particles, length and perimeter of the electrodes is implemented to identify the correlations with mass deposited, thickness of the coating and yield rate when LiFePO<sub>4</sub> and Carbon Black particles in ethanol suspension are used. In order to capture the variation over time, each parameter is studied at six different time of deposition. A concentration that optimises yield rate resulting in thickness and mass deposition is identified. The resistivity of the suspension dictates the yield rate dynamics, allowing it to be designed within a specific range to meet requirements of different applications.</div></div>","PeriodicalId":383,"journal":{"name":"Materials & Design","volume":"247 ","pages":"Article 113446"},"PeriodicalIF":7.6,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142651824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microstructural evolution and strengthening mechanism of U71Mn steel joints fabricated by friction-flash hybrid welding 摩擦闪光混合焊接 U71Mn 钢接头的微结构演变和强化机理

IF 7.6 2区材料科学

Materials & Design Pub Date : 2024-11-01 DOI: 10.1016/j.matdes.2024.113403

Jiaqing You , Jinhong Tan , Xingping Liu , Kai Du , Jiarui Li , Chengyang Yi , Yunqiang Zhao

{"title":"Microstructural evolution and strengthening mechanism of U71Mn steel joints fabricated by friction-flash hybrid welding","authors":"Jiaqing You , Jinhong Tan , Xingping Liu , Kai Du , Jiarui Li , Chengyang Yi , Yunqiang Zhao","doi":"10.1016/j.matdes.2024.113403","DOIUrl":"10.1016/j.matdes.2024.113403","url":null,"abstract":"<div><div>The softening layer formed by the ferrite in the welding interface can significantly reduce the mechanical properties of traditional flash butt welding joints. This study proposed a flash-friction hybrid welding method to address the issue of the ferrite softening layer and comprehensively investigated the impact of vibration friction speed on joint performance. The results showed that increasing the vibration friction speed could effectively inhibit the formation of the ferrite softening layer in the weld center zone (WCZ) and enhance the mechanical properties of the joint. When the vibration friction speed was 3 mm/s, the tensile strength of the joint reached its maximum value of 982.9 MPa, approximately equal to 97.3 % of that of the base material (BM). The fracture occurred in the heat-affected zone (HAZ) and was characterized by a ductile fracture mechanism. Moreover, the microstructural analysis revealed that dynamic recrystallization (DRX) occurred in the WCZ, thermo-mechanically affected zone (TMAZ), and fine-grained zone (FGZ)-HAZ of the joint. Compared to the BM, the grain size significantly decreased, and the thickness and spacing of lamellar cementite also reduced. These microstructural evolutions also contributed to the enhanced mechanical properties of the joints. This study provided new insights for welding in the rail transportation field.</div></div>","PeriodicalId":383,"journal":{"name":"Materials & Design","volume":"247 ","pages":"Article 113403"},"PeriodicalIF":7.6,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142553105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Machine learning in additive manufacturing——NiTi alloy’s transformation behavior 机器学习在快速成型制造中的应用--镍钛合金的转化行为

IF 7.6 2区材料科学

Materials & Design Pub Date : 2024-11-01 DOI: 10.1016/j.matdes.2024.113443

Lidong Gu , Kongyuan Yang , Hongchang Ding , Zezhou Xu , Chunling Mao , Panpan Li , Zhenglei Yu , Yunting Guo , Luquan Ren

{"title":"Machine learning in additive manufacturing——NiTi alloy’s transformation behavior","authors":"Lidong Gu , Kongyuan Yang , Hongchang Ding , Zezhou Xu , Chunling Mao , Panpan Li , Zhenglei Yu , Yunting Guo , Luquan Ren","doi":"10.1016/j.matdes.2024.113443","DOIUrl":"10.1016/j.matdes.2024.113443","url":null,"abstract":"<div><div>The laser powder bed fused NiTi alloys (LPBF-NiTi) demonstrate shape memory functionality and superelasticity as a result of their distinctive phase transition characteristics. Nevertheless, achieving precise control and regulation of the phase transition temperature poses a challenge, influenced by factors like powder composition and process parameter. In this study, a feature screening strategy and machine learning (ML) method were employed to predict and regulate the phase transition temperature of LPBF-NiTi alloy, offering a more efficient and cost-effective alternative to traditional experimental methods of regulation and control. Specifically, accuracy analysis was performed on LPBF-NiTi phase transition datasets with varying compositions and process conditions utilizing generalized regression neural network (GRNN), and other methods. The findings indicate that the interpretable features extracted through the selection strategy outlined in this study when combined with the GRNN model, demonstrate a high level of prediction accuracy (R<sup>2</sup> = 0.97). To investigate the accuracy of the model, this study utilized various process parameters to fabricate NiTi alloys with different compositions from Ni<sub>50.8</sub>Ti<sub>49.2</sub> alloy powder. Using this model, the study identified a novel, larger window of optimal LPBF processing that allows for controllable complex phase transitions.</div></div>","PeriodicalId":383,"journal":{"name":"Materials & Design","volume":"247 ","pages":"Article 113443"},"PeriodicalIF":7.6,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142651857","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of firing process on the composition, structure, and properties of near stoichiometric SiC fiber 焙烧工艺对接近化学计量的碳化硅纤维的成分、结构和性能的影响

IF 7.6 2区材料科学

Materials & Design Pub Date : 2024-11-01 DOI: 10.1016/j.matdes.2024.113427

Wenxing Zhao, Yuanfeng Gan, Xiaozhou Wang

引用次数: 0

3D printed magnetostrictive polymer composites (MPCs) for wireless stress sensing 用于无线应力传感的 3D 打印磁致伸缩聚合物复合材料 (MPC)

IF 7.6 2区材料科学

Materials & Design Pub Date : 2024-11-01 DOI: 10.1016/j.matdes.2024.113402

Alex Abraham Paul , Quang Hao Nguyen , Wen Shen

{"title":"3D printed magnetostrictive polymer composites (MPCs) for wireless stress sensing","authors":"Alex Abraham Paul , Quang Hao Nguyen , Wen Shen","doi":"10.1016/j.matdes.2024.113402","DOIUrl":"10.1016/j.matdes.2024.113402","url":null,"abstract":"<div><div>As the mechanical performance of 3D printed polymers advances, there arises an urgent demand for enhanced methodologies to ensure their structural integrity. In this work, magnetostrictive polymer composites (MPCs) are investigated utilizing an ultraviolet (UV) curable epoxy resin through direct ink writing (DIW) for internal stress detection. A strong correlation between stress and magnetic flux change was observed within the printed MPCs. Impact from the inclusion of fumed silica (FS) as a rheological filler in the matrix were identified and investigated. The tensile strengths of the MPCs were in the range of 31 MPa–34 MPa. The changes in magnetic flux density (Δ<em>B</em>) of the MPCs under quasistatic loading were within the interval of 0.5 to 5.4 Gauss. A similar sensing behavior was obtained for the MPCs during cyclic loading. A similar sensing behavior was obtained for the MPCs during cyclic loading. Furthermore, it was found that incorporating the MPCs into specific layers further increased the tensile strength to over 40 MPa while still showing a significant Δ<em>B</em> response. Additionally, localized deposition of magnetostrictive particles at known stress concentrations emerged as a promising strategy for future stress-sensing endeavors.</div></div>","PeriodicalId":383,"journal":{"name":"Materials & Design","volume":"247 ","pages":"Article 113402"},"PeriodicalIF":7.6,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142651922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0