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Influence of the sheet thickness variability on the deep drawing of a cylindrical cup 板材厚度变化对圆柱形杯深冲的影响
Materials Research Proceedings Pub Date : 2024-05-15 DOI: 10.21741/9781644903131-202
A.F.G. Pereira
{"title":"Influence of the sheet thickness variability on the deep drawing of a cylindrical cup","authors":"A.F.G. Pereira","doi":"10.21741/9781644903131-202","DOIUrl":"https://doi.org/10.21741/9781644903131-202","url":null,"abstract":"Abstract. Sheet metal forming processes are widely used in industry. The quality of formed parts can be significantly affected by various sources of uncertainty inevitably associated with the forming process. The objective of this work is to quantify the influence of thickness variability on the forming process of a cylindrical cup. Using numerical simulation, the influence of the sheet thickness variance on the evolution of the punch force versus displacement, the equivalent plastic strain distribution, the earing profile and the thickness around the cup is studied for a given cup height. Four thickness distributions with different variance values and the same average thickness value were studied. It was concluded that an increase in variance leads to an increase in thickness dispersion (at the base and curvature of the cup) and an increase in equivalent strain dispersion along the cup. The earing profile of the cup is also affected by the thickness variability, but to a lesser extent. On the other hand, the development of the punch force is not affected by the thickness variability.","PeriodicalId":515987,"journal":{"name":"Materials Research Proceedings","volume":"6 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140974441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An experimental investigation into tribological behaviour of additively manufactured biocompatible Ti-6Al-4V alloy 对添加式制造的生物相容性 Ti-6Al-4V 合金摩擦学行为的实验研究
Materials Research Proceedings Pub Date : 2024-05-15 DOI: 10.21741/9781644903131-19
Marcin Madej
{"title":"An experimental investigation into tribological behaviour of additively manufactured biocompatible Ti-6Al-4V alloy","authors":"Marcin Madej","doi":"10.21741/9781644903131-19","DOIUrl":"https://doi.org/10.21741/9781644903131-19","url":null,"abstract":"Abstract. Additive manufacturing techniques are increasingly being utilized in industrial-level applications due to their flexibility and ability to produce customized parts, such as various types of biomedical implants. However, the conditions during additive manufacturing fabrication and the nature of these processes can lead to implications on the properties of the produced parts, potentially requiring appropriate post-processing before real applications. The tribological behavior of printed parts not only affects their performance but also their service life, making it crucial to investigate their wear rate and friction coefficient under different lubricant environments. In this study, an experimental investigation was conducted on as-printed Ti-6Al-4V specimens to determine the effect of various lubricant environments on wear rate and friction coefficient. The results demonstrated that the reduction in wear rate in liquid environments can be significantly hindered by the accumulation of debris from the worn specimen. However, the development of a thin film of an appropriate lubricant was shown to be favorable regarding the friction behavior of printed parts.","PeriodicalId":515987,"journal":{"name":"Materials Research Proceedings","volume":"6 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140975093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Machine learning application for optimization of laser directed energy deposition process for aerospace component rapid prototyping in additive manufacturing 将机器学习应用于优化增材制造中航空航天部件快速成型的激光定向能沉积工艺
Materials Research Proceedings Pub Date : 2024-05-15 DOI: 10.21741/9781644903131-31
G. Ertugrul
{"title":"Machine learning application for optimization of laser directed energy deposition process for aerospace component rapid prototyping in additive manufacturing","authors":"G. Ertugrul","doi":"10.21741/9781644903131-31","DOIUrl":"https://doi.org/10.21741/9781644903131-31","url":null,"abstract":"Abstract. The paper proposes a methodology for determining the optimal L-DED parameters based on the minimum number planned of L-DED trials. A dataset compiled from planned L-DED experiments was used to train a machine learning model. The algorithm demonstrated a robust ability to predict the output metrics with notable accuracy and proposed a theoretical framework that modeled the complex relationships between the input variables and the resulting critical welding properties for AM. The application of the developed model and its comparison with conventional methods thus offers a methodical approach to determining the optimum process parameters in advance. This is a step towards the development and production of additively manufactured components for future digital twin application in the aerospace industry.","PeriodicalId":515987,"journal":{"name":"Materials Research Proceedings","volume":"53 20","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140975189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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 different oxide layer shares on the upsetting of titanium aluminide specimens 不同氧化层份额对铝钛试样镦粗的影响
Materials Research Proceedings Pub Date : 2024-05-15 DOI: 10.21741/9781644903131-105
Sebastian Döring
{"title":"Effect of different oxide layer shares on the upsetting of titanium aluminide specimens","authors":"Sebastian Döring","doi":"10.21741/9781644903131-105","DOIUrl":"https://doi.org/10.21741/9781644903131-105","url":null,"abstract":"Abstract. By ball milling in a low-oxygen atmosphere, it was possible to show that titanium aluminides (TiAl) can be processed into components by pressing and sintering in the same atmosphere. The properties (e.g. hardness and density) that can be realised with established processes such as field-assisted sintering (FAST) or hot isostatic pressing (HIP) were not achieved. Pores in the component are closed by forming processes, which improves the mechanical properties. In this work, powder-metallurgically processed TiAl was hot-formed in a low-oxygen atmosphere. The forging parameters and pre-consolidation were characterised with regard to their effect on the component properties. Force, hardness and porosity measurements as well as metallographic analyses were used to evaluate the process and the resulting specimens. It was found that a pre-consolidation and a higher degree of deformation lead to a lower porosity and a higher hardness.","PeriodicalId":515987,"journal":{"name":"Materials Research Proceedings","volume":"59 18","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140975305","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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 cold rolled surface structures with undercuts for interlocking joints on bending processes 用于联锁接头的带暗槽冷轧表面结构对弯曲工艺的影响
Materials Research Proceedings Pub Date : 2024-05-15 DOI: 10.21741/9781644903131-186
A. Ringel
{"title":"Influence of cold rolled surface structures with undercuts for interlocking joints on bending processes","authors":"A. Ringel","doi":"10.21741/9781644903131-186","DOIUrl":"https://doi.org/10.21741/9781644903131-186","url":null,"abstract":"Abstract. Lightweight design is one of the methods to reduce CO2 emissions and optimize energy efficiency in the transportation sector. The main motivation of this study arise from weight reduction through multi-material design with the materials commonly used in the automotive industry, steel and aluminum. Metallurgical bonding of steel and aluminum carries the risk of forming brittle intermetallic phases. Hence, new joining techniques such as joining by forming or casting are promising for these multi-material components. Previously, a hybrid component method was presented using channel-like surface structures with undercuts on a steel sheet created in a modified cold rolling process. In a subsequent high-pressure die casting, the channels were filled with aluminum melt, forming an interlocking connection as it solidified. As automotive components demand increased complexity, the bending of the structured sheet before casting was investigated. This study aims to analyze how the surface structure affects the bending process. Numerical simulations and experiments were used to investigate the effect on the maximum bending force, the resulting bending angle and springback. Therefore, the parameters bending angle, bending radius, and the lateral or longitudinal orientations of the channel structure on either sides of the bend were taken into account. The results showed a strong influence of the lateral and longitudinal orientation on the maximum bending force. Furthermore, a minor effect of the bending radius on the force and springback was found.","PeriodicalId":515987,"journal":{"name":"Materials Research Proceedings","volume":"38 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140975867","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Microstructure refinement by a novel friction-based processing on Mg-Zn-Ca alloy 通过新型摩擦加工细化镁锌钴合金的微观结构
Materials Research Proceedings Pub Date : 2024-05-15 DOI: 10.21741/9781644903131-224
Ting Chen
{"title":"Microstructure refinement by a novel friction-based processing on Mg-Zn-Ca alloy","authors":"Ting Chen","doi":"10.21741/9781644903131-224","DOIUrl":"https://doi.org/10.21741/9781644903131-224","url":null,"abstract":"Abstract. Insufficient mechanical properties and uncontrollable degradation rates limit the wide application of Mg alloys in bioimplant materials. Microstructure refinement is a common method to improve both the mechanical properties and the corrosion resistance of Mg alloys. In order to efficiently obtain Mg alloys with fine microstructures for potential applications in bioimplant materials, a novel constrained friction processing (CFP) was proposed. In this work, the resulting compression properties of ZX10 alloy obtained by CFP with optimized processing parameter are reported. Additionally, the microstructure evolution during CFP was studied. The results show that during CFP, materials are subjected to high shear strain at the transition zone between the stir zone and thermo-mechanical affected zone, leading to recrystallization with strong local basal fiber shear texture. As the shoulder plunges down, the fraction of recrystallized grain and grain size increase. ZX10 alloy obtained by CFP exhibited higher compressive yield strength by more than 300% and ultimate compressive strength improves by 60%, which indicates the bright prospect of CFP for Mg processing.","PeriodicalId":515987,"journal":{"name":"Materials Research Proceedings","volume":"12 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140976214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Experimental evidence on the twisting of incrementally formed polymer sheets by varying the toolpath strategy 通过改变刀具路径策略实现增量成形聚合物片材扭曲的实验证据
Materials Research Proceedings Pub Date : 2024-05-15 DOI: 10.21741/9781644903131-262
A. Formisano
{"title":"Experimental evidence on the twisting of incrementally formed polymer sheets by varying the toolpath strategy","authors":"A. Formisano","doi":"10.21741/9781644903131-262","DOIUrl":"https://doi.org/10.21741/9781644903131-262","url":null,"abstract":"Abstract. In recent years, polymer sheets have been formed by a relatively innovative technology, born for metals and in line with the layered manufacturing principle of rapid prototyping, the incremental sheet forming. This process guarantees high customization and cost-effectiveness but, at the same time, activates some peculiar defects like the twisting phenomenon. To reduce the risk of twisting and the occurrence of failures, it is preferable to reduce the forming forces and one of the solutions is the choice of opportune toolpath strategies. Concerning this, the present experimental research is along the same lines as recent numerical works of the authors; thermoplastic sheets were worked by incremental forming by varying the toolpath strategy. Following the realization of cone frusta, the forming forces and the deformation of the sheets were monitored, to investigate a toolpath strategy capable of reducing the risk of failures and defects for incrementally formed polymer sheets.","PeriodicalId":515987,"journal":{"name":"Materials Research Proceedings","volume":"9 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140976420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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 micro-plasto-hydrodynamic lubrication on strip surface in steel cold rolling 钢材冷轧过程中微晶-流体动力润滑对带材表面的影响
Materials Research Proceedings Pub Date : 2024-05-15 DOI: 10.21741/9781644903131-142
Cynthia Elhajj
{"title":"Effect of micro-plasto-hydrodynamic lubrication on strip surface in steel cold rolling","authors":"Cynthia Elhajj","doi":"10.21741/9781644903131-142","DOIUrl":"https://doi.org/10.21741/9781644903131-142","url":null,"abstract":"Abstract. This study employs numerical calculations based on the micro-plasto-hydrodynamic lubrication (MPHDL) theory to analyze the evolution of oil pits during the stainless-steel cold rolling process. The model is enhanced by incorporating lubricant temperature variations caused by its contact with the heated roll and strip, as well as variations in pit slope. The findings show the significant impact and relevance of considering these additional parameters in assessing the performance of the MPHDL mechanism. Notably, the model demonstrates good agreement with experimental measurements conducted on a Stainless-Steel grade undergoing multiple passes.","PeriodicalId":515987,"journal":{"name":"Materials Research Proceedings","volume":"50 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140976482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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 heterogeneous mechanical tests 异质机械测试的实验研究
Materials Research Proceedings Pub Date : 2024-05-15 DOI: 10.21741/9781644903131-193
M. Gonçalves
{"title":"Experimental investigation of heterogeneous mechanical tests","authors":"M. Gonçalves","doi":"10.21741/9781644903131-193","DOIUrl":"https://doi.org/10.21741/9781644903131-193","url":null,"abstract":"Abstract. The virtualization of sheet metal forming processes requires a precise numerical model with an accurate description of the material behavior that is classically obtained by carrying out quasi-homogeneous mechanical tests. However, several alternatives to this time-consuming task are under study. Heterogeneous tests can provide a large quantity of mechanical information in a single experiment and, therefore, their potential needs to be investigated. This work aims to present an advanced mechanical test designed by topology optimization under experimental investigation. A numerical design methodology is described, leading to a specimen geometry that is subjected experimentally to uniaxial tensile loading up to rupture. A dual-phase DP600 steel is used. During the test, the strain field is extracted from the specimen surface using a stereo digital image correlation system, and the richness of the mechanical information is further analyzed.","PeriodicalId":515987,"journal":{"name":"Materials Research Proceedings","volume":"5 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140976747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Recent advances in development, characterization and joining of new sustainable materials 新型可持续材料的开发、表征和连接方面的最新进展
Materials Research Proceedings Pub Date : 2024-05-15 DOI: 10.21741/9781644903131-59
Mariana DOINA BANEA
{"title":"Recent advances in development, characterization and joining of new sustainable materials","authors":"Mariana DOINA BANEA","doi":"10.21741/9781644903131-59","DOIUrl":"https://doi.org/10.21741/9781644903131-59","url":null,"abstract":"Abstract. Nowadays, in order to increase the transport efficiency and reduce fuel consumption and emissions of contaminants, a reduction in weight associated with improved safety performance of the materials in use must be achieved. On the other hand, environmental concern has generated interest in research about new materials aligned with the principles of sustainability. Thus, this need for better performing and ecological structures has resulted in the development of a new variety of materials. Among these materials, currently, are the composites produced from resources of renewable sources. Natural fiber composites have recently attracted a great deal of attention by the industry due to their many attractive benefits (e.g., high strength-to-weight ratio, sustainable characteristics and low cost). Welding is highly impractical to use in these situations (i.e., thermoset polymer composites) and rivets or screws exhibit stress concentrations and offer a low fatigue resistance. Adhesive bonding is usually the preferred method since it allows for greater flexibility in design and is more efficient in mechanical and energy aspects. In this work, recent advances in development, characterization and joining of new sustainable materials, critical challenges and future perspectives are presented. The application of sustainable green composites may further increase in many structural and non-structural applications if their joining behavior is well-known and established.","PeriodicalId":515987,"journal":{"name":"Materials Research Proceedings","volume":"123 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140977545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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