Journal of Materials Research and Technology最新文献_第8页

Unravelling asymmetrical microstructure evolution and tensile fracture mechanism in laser welding of dissimilar 2219/2195 aluminum alloys 揭示异种 2219/2195 铝合金激光焊接中的非对称微观结构演变和拉伸断裂机制

Journal of Materials Research and Technology Pub Date : 2024-07-24 DOI: 10.1016/j.jmrt.2024.07.087

Yanqiu Zhao, Lujing Hao, Ruizu Liu, Jianfeng Wang, Yuqin Zeng, Xiaohong Zhan

{"title":"Unravelling asymmetrical microstructure evolution and tensile fracture mechanism in laser welding of dissimilar 2219/2195 aluminum alloys","authors":"Yanqiu Zhao, Lujing Hao, Ruizu Liu, Jianfeng Wang, Yuqin Zeng, Xiaohong Zhan","doi":"10.1016/j.jmrt.2024.07.087","DOIUrl":"https://doi.org/10.1016/j.jmrt.2024.07.087","url":null,"abstract":"The laser welding of dissimilar 2219 Al–Cu and 2195 Al–Li alloys is a significant attempt in the fabrication of rocket propellant tanks, aiming at the escalating demands for weight reduction and cost efficiency. The variances in microstructure evolution for 2219/2195 aluminum alloys laser welded joint deserves thorough investigation because it certainly results in the discrepancies in mechanical property In this paper, the temperature field, microstructure, element distribution, grain orientation, and texture on both sides of the laser welded joint were comprehensively investigated through a combination of simulations and experiments. The tensile strength was tested and the fracture mechanism was analyzed based on the microstructure characteristic. It is found that the wider columnar dendrites zone is generated due to the large temperature gradient from on the 2195 Al–Li alloy side. The grain orientation of the non-dendrite equiaxed zone (EQZ) and columnar grain near the fusion line are significantly influenced by the grain orientation of base metal (BM). On the one side of 2195 Al–Li alloy, the majority of grains feature diameters predominantly within the 3–6 μm range. The region in the vicinity of fusion line on one side of the 2195 Al–Li alloy has the weakest performance. It is deduced that the poor tensile property on one side of the 2195 Al–Li alloy is not only attributed to the loss of Mg and Li elements, but also owing to the evolution of texture. The rotated goss texture with high intensity is formed in EQZ near the fusion line on one side of 2219 Al–Cu alloy.","PeriodicalId":501120,"journal":{"name":"Journal of Materials Research and Technology","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141783687","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 and nanoscratch behavior of spark-plasma-sintered Ti-V-Al-Nb-Hf high-entropy alloy 火花等离子烧结 Ti-V-Al-Nb-Hf 高熵合金的微观结构和纳米划痕行为

Journal of Materials Research and Technology Pub Date : 2024-07-23 DOI: 10.1016/j.jmrt.2024.07.081

Sheetal Kumar Dewangan, Nagarjuna Cheenepalli, Hansung Lee, Byungmin Ahn

引用次数: 0

Unraveling the dual cracking mechanism of 316L/CuSn10 heterostructures fabricated by laser powder bed fusion 揭示激光粉末床熔融法制造的 316L/CuSn10 异质结构的双重开裂机制

Journal of Materials Research and Technology Pub Date : 2024-07-23 DOI: 10.1016/j.jmrt.2024.07.148

Xiaoqiang Wang, Yakun Tao, Yan Zhou, Shifeng Wen, Yusheng Shi

{"title":"Unraveling the dual cracking mechanism of 316L/CuSn10 heterostructures fabricated by laser powder bed fusion","authors":"Xiaoqiang Wang, Yakun Tao, Yan Zhou, Shifeng Wen, Yusheng Shi","doi":"10.1016/j.jmrt.2024.07.148","DOIUrl":"https://doi.org/10.1016/j.jmrt.2024.07.148","url":null,"abstract":"A comprehensive understanding of cracking mechanisms and the prevention of interfacial microcrack formation are imperative for additive manufacturing of high-performance multi-material heterostructures. This study systematically investigated 316L/CuSn10 heterostructures and identified solidification cracking and solid-state cracking as the predominant mechanisms. Solidification cracking is closely linked to the copper content within the mixing zone, particularly evident at 10% copper content, which heightens sensitivity to solidification cracking due to the widening of intergranular spacing and the elongation of the liquid film channel. Solid-state cracks tend to initiate from pre-existing solidification cracks, propagate along high-angle grain boundaries (HAGBs), particularly within a specific misorientation angle range of 20°-50°, terminating eventually at low-angle grain boundaries (LAGBs). This is mainly controlled by the distribution of dislocations at crack tips, which are dispersed within the grains at LAGBs, and the resulting back stress contributes to crack termination. These findings contribute valuable insights into the cracking mechanisms in heterostructures and offer guidance for the fabrication of crack-free steel-copper components.","PeriodicalId":501120,"journal":{"name":"Journal of Materials Research and Technology","volume":"41 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141783615","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

Comprehensive study on the differences in microstructure and mechanical properties of Mg-Li alloy fabricated by additive manufacturing, casting, and rolling 增材制造、铸造和轧制镁锂合金微观结构和机械性能差异的综合研究

Journal of Materials Research and Technology Pub Date : 2024-07-23 DOI: 10.1016/j.jmrt.2024.07.147

Dengke Liu, Xuewen Zong, Pengsheng Xue, Yan Zhang, Hongzhi Zhou, Zhongtang Gao, Rui Wang, Bingheng Lu

{"title":"Comprehensive study on the differences in microstructure and mechanical properties of Mg-Li alloy fabricated by additive manufacturing, casting, and rolling","authors":"Dengke Liu, Xuewen Zong, Pengsheng Xue, Yan Zhang, Hongzhi Zhou, Zhongtang Gao, Rui Wang, Bingheng Lu","doi":"10.1016/j.jmrt.2024.07.147","DOIUrl":"https://doi.org/10.1016/j.jmrt.2024.07.147","url":null,"abstract":"In order to explore the forming mechanism of direct energy deposition of magnesium-lithium alloy wire with high lithium content, this study introduces a novel approach utilizing Cold Metal Transfer Wire Arc Additive Manufacturing (CMT-WAAM) to successfully fabricate thin-walled structures of LA103Z Mg-Li alloy. A comprehensive comparison was conducted to evaluate the microstructure and mechanical properties of different regions on CMT-WAAM samples, in addition to cast and rolled samples. The microstructure of CMT-WAAM samples is mainly composed of β-Li phase and fine needle shaped α-Mg phase, exhibiting a notable divergence from the microstructure observed in cast and rolled samples. It is noteworthy that the mechanical properties along the deposition direction exhibited significant variability in CMT-WAAM samples, but no significant anisotropy is discerned in the mechanical properties along the deposition and scanning directions. The discrepancies in mechanical properties across different regions are predominantly attributed to variations in grain size, and the size and proportion of the α-Mg phase and secondary phases, which are related to the low heat input and high cooling rate of the CMT-WAAM process. The mean tensile strength of CMT-WAAM samples is 159.5 MPa, marking a respective increase of 30.7% and 13.9% compared to cast and rolled samples. These findings underscore the outstanding strength of CMT-WAAM samples compared to conventionally formed samples. This study provides novel insights into additive manufacturing of dual-phase Mg-Li alloys for large-scale complex structures.","PeriodicalId":501120,"journal":{"name":"Journal of Materials Research and Technology","volume":"6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141783691","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

Dynamic constitutive model of Fe–Cr–Ni stainless steel based on isothermal true stress-strain curves 基于等温真实应力-应变曲线的 Fe-Cr-Ni 不锈钢动态构成模型

Journal of Materials Research and Technology Pub Date : 2024-07-21 DOI: 10.1016/j.jmrt.2024.07.102

Chenchong Du, Feng Jiang, Bicheng Guo, Yong Zhang

{"title":"Dynamic constitutive model of Fe–Cr–Ni stainless steel based on isothermal true stress-strain curves","authors":"Chenchong Du, Feng Jiang, Bicheng Guo, Yong Zhang","doi":"10.1016/j.jmrt.2024.07.102","DOIUrl":"https://doi.org/10.1016/j.jmrt.2024.07.102","url":null,"abstract":"Austenitic Fe–Cr–Ni stainless steel is widely used in aviation, chemistry, energy, due to its excellent properties of high-temperature performance. In this study, the splitting Hopkinson pressure bar with high-temperature system was employed to evaluate the dynamic mechanical properties of Fe–Cr–Ni stainless steel. The true stress-strain curves were obtained under varying conditions, including variable strains, strain rates and temperatures. The true stress increases and levels off as the true strain increases, while increases as the strain rate increases, but decreases sharply as the deformation temperature rises. The deformation temperature is consist of healing temperature and adiabatic temperature. The adiabatic temperature rise related to the specific heat capacity was calculated. The actual deformation temperatures were calculated under different strains by combining the true stress-strain curves. The true stress-strain curve under variable temperature was corrected to the stress-strain curve under isothermal state by using the thermal softening rate, which decoupled the strain and temperature. The Power-Law and Johnson-Cook constitutive models were fitted based on the real stress-strain isothermal curve. The fitting accuracy of Power-Law model was 1.61% for different strain rates at room temperature in average, 3.51% for fixed strain rate at different temperatures. While the fitting accuracy of Johnson-Cook model was 2.94% for different strain rates at room temperature in average, 6.18% for fixed strain rate at different temperatures.","PeriodicalId":501120,"journal":{"name":"Journal of Materials Research and Technology","volume":"139 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141783702","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

Enhanced mechanical properties of dispersed carbide-strengthened CrFeNi-based medium entropy alloys prepared via powder metallurgy 通过粉末冶金法制备的分散碳化物强化铬铁镍基中熵合金的机械性能得到增强

Journal of Materials Research and Technology Pub Date : 2024-07-21 DOI: 10.1016/j.jmrt.2024.07.110

Baozhen Yang, En Zhu, Wei Zhang, Zhendong Zhong, Xiang Xiong, Rutie Liu

引用次数: 0

Roles of lattice and grain boundary on hydrogen diffusion and trap behaviors in single-and poly-crystalline CrCoNi medium-entropy alloy 晶格和晶界对单晶和多晶铬钴镍中熵合金中氢扩散和捕获行为的影响

Journal of Materials Research and Technology Pub Date : 2024-07-20 DOI: 10.1016/j.jmrt.2024.07.120

Dae Cheol Yang, Ki Jeong Kim, Gunjick Lee, Sang Yoon Song, Ju-Hyun Baek, Jin-Yoo Suh, Seong-Moon Seo, Young Kyun Kim, Young Sang Na, Seok Su Sohn

{"title":"Roles of lattice and grain boundary on hydrogen diffusion and trap behaviors in single-and poly-crystalline CrCoNi medium-entropy alloy","authors":"Dae Cheol Yang, Ki Jeong Kim, Gunjick Lee, Sang Yoon Song, Ju-Hyun Baek, Jin-Yoo Suh, Seong-Moon Seo, Young Kyun Kim, Young Sang Na, Seok Su Sohn","doi":"10.1016/j.jmrt.2024.07.120","DOIUrl":"https://doi.org/10.1016/j.jmrt.2024.07.120","url":null,"abstract":"In this study, single-crystalline and poly-crystalline CrCoNi alloys are utilized as model systems to analyze the distinct roles of each GB and interstitial lattice sites. To effectively reveal hydrogen behavior, both electrochemical and gaseous hydrogen pre-charging methods are applied. Hydrogen content, diffusivity, and trap behaviors are quantified using thermal desorption analysis and hydrogen permeation tests, which determines (1) changes in hydrogen behavior depending on the presence of GB and (2) alterations in hydrogen behavior depending on lattice crystallographic orientation. The results indicate that GB and interstitial lattice sites exhibit comparable binding energies for hydrogen trapping. However, the introduction of GB alters the primary trapping sites from interstitial lattice sites to GB. In this case, the hydrogen content in the poly-crystalline alloy is determined by the trap site density of the primary trapping site. On the other hand, in the single-crystalline alloy, where only interstitial lattice sites exist, the crystallographic orientation of the hydrogen-charged plane is an important variable that determines hydrogen content and hydrogen diffusivity. Such insights contribute to a deeper understanding of hydrogen behavior within a more intricate microstructure, suggesting the alloy design approach to enhance resistance to HE.","PeriodicalId":501120,"journal":{"name":"Journal of Materials Research and Technology","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141783704","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

Multi-stage strain-hardening behavior of dual-phase steels: A review 双相钢的多级应变硬化行为：综述

Journal of Materials Research and Technology Pub Date : 2024-07-20 DOI: 10.1016/j.jmrt.2024.07.100

Y. Najafi, Y. Mazaheri, Z. Delbari Ragheb, H. Daiy

引用次数: 0

Formation and properties of nitrided layer on 2205 duplex stainless steel by anodic plasma-nitriding assisted with hollow cathode discharge 空心阴极放电辅助阳极等离子氮化法在 2205 双相不锈钢上形成氮化层及其特性

Journal of Materials Research and Technology Pub Date : 2024-07-20 DOI: 10.1016/j.jmrt.2024.07.122

Shuo Zhao, Liang Wang

引用次数: 0

The influence of sub-surface damage microstructure on ultra-thin die flexural strength 表层下损伤微观结构对超薄模具抗弯强度的影响

Journal of Materials Research and Technology Pub Date : 2024-07-20 DOI: 10.1016/j.jmrt.2024.07.121

Liu Shu, Chongyang Li, Yunwen Wu, Tao Hang, Lei Liu, Ming Li

{"title":"The influence of sub-surface damage microstructure on ultra-thin die flexural strength","authors":"Liu Shu, Chongyang Li, Yunwen Wu, Tao Hang, Lei Liu, Ming Li","doi":"10.1016/j.jmrt.2024.07.121","DOIUrl":"https://doi.org/10.1016/j.jmrt.2024.07.121","url":null,"abstract":"In the semiconductor industry, where miniaturization is a key driver, mechanical properties of ultra-thin dies are increasingly important research topics. Sub-surface damage (SSD) is a common issue in wafer thinning processes, but there is a lack of research on the relationship between SSD microstructure and ultra-thin die strength. In this study, the influence of SSD microstructure on flexural strength was investigated through three-point bending tests of ultra-thin dies prepared by distinct wafer-thinning methods, coupled with SSD microstructure characterization. Flexural strength was highest for dies dry polished with N pad, intermediate for dies dry polished with M pad, and lowest for dies with fine grinding. We researched SSD microstructure by high-resolution transmitted electron microscope (HRTEM), revealing that it comprises amorphous regions, micro-cracks, and high-density distortion areas. The SSD of the fine grinding samples was thick and intermittent, with observable micro-cracks. Comparatively, the SSD structure from M pad polishing was uniform but thicker, whereas SSD from N pad polishing was thinner but exhibited greater variability. SSD thickness not only influences the average value but also dictates the distribution of flexural strength. This research enhances the understanding of SSD microstructure's impact on ultra-thin die flexural strength, providing valuable insights for optimizing wafer thinning processes to enhance die reliability.","PeriodicalId":501120,"journal":{"name":"Journal of Materials Research and Technology","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141783705","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