CAREER: Understanding of Diffusion and Deformation Mechanisms in Multi-Principal Element Alloy Interlayers for Manufacturing of Multi-Material Structures

职业：了解用于制造多材料结构的多主元合金夹层的扩散和变形机制

• 批准号: 1847630
• 负责人: Zhenzhen Yu
• 金额: $ 50万
• 依托单位: Colorado School of Mines
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-06-01 至 2024-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1847630&HistoricalAwards=false
• 关键词: CAREER; Understanding; Diffusion; Deformation; Mechanisms

In almost every manufacturing sector, challenges exist in joining dissimilar materials due to the mismatches in their thermal, physical, and chemical properties. These challenges are exacerbated as component and system designs demand ever-increasing performance, and as interest in additive manufacturing of advanced multi-material structures continues to grow. A promising approach to prevent detrimental reactions at joint interfaces is to place an interlayer between the two metals, which can be used to improve ductility and prevent chemical diffusion of the base materials. This Faculty Early Career Development Program (CAREER) award supports research to establish a computational design methodology to accelerate the interlayer alloy design, providing new fundamental knowledge of the mechanisms that control diffusion and mechanical performance in these joints. This has the potential to enable joining of dissimilar and previously incompatible materials while optimizing performance for a wide range of applications in the automotive, aerospace and power generation industries. This project will also provide a platform for the education of the next generation of scientists and engineers in the field of joining and advanced manufacturing, with a focus on fundamental scientific knowledge, advanced computational skills, hands-on research experiences, and strong industrial engagement.Multi-principal element alloys have been reported to exhibit excellent mechanical properties. This work will provide critical insights to the thermodynamics, kinetics, and mechanics of multi-principal element alloys. The research program will investigate the relationships between diffusion behavior and composition, phase stability, and mechanical performance. Complex deformation mechanisms in multi-principal element alloys with a primary FCC phase will be investigated, using multiscale physics-based models and in-situ advanced characterization methods to reveal the underlying mechanisms, quantify the key parameters, and challenge existing theories.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

在几乎每个制造行业中，由于热、物理和化学性质的不匹配，连接不同材料都存在挑战。随着组件和系统设计对性能的要求不断提高，以及对先进多材料结构的增材制造的兴趣不断增长，这些挑战变得更加严峻。防止接头界面有害反应的一种有希望的方法是在两种金属之间放置一个夹层，可以用来提高延展性并防止基材的化学扩散。该学院早期职业发展计划（CAREER）奖支持研究建立计算设计方法，以加速夹层合金设计，提供控制这些接头中扩散和机械性能的机制的新基础知识。这有可能实现不同和以前不兼容的材料的连接，同时优化汽车，航空航天和发电行业中广泛应用的性能。该项目还将为连接和先进制造领域的下一代科学家和工程师提供一个教育平台，重点是基础科学知识，先进的计算技能，实践研究经验和强大的工业参与。据报道，多主元素合金具有优异的机械性能。这项工作将为多主元素合金的热力学、动力学和力学提供重要的见解。该研究计划将调查扩散行为和组成，相稳定性和机械性能之间的关系。通过使用基于物理的多尺度模型和原位先进表征方法，研究具有FCC主相的多主元素合金的复杂变形机制，以揭示潜在机制，量化关键参数，并挑战现有理论。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Triaxial Constraint and Tensile Strength Enhancement in Brazed Joints

• DOI: 10.1007/s11661-020-05984-x
• 发表时间: 2020-09
• 期刊: Metallurgical and Materials Transactions A
• 作者: Xin Cai;Yanfei Gao;Xue Wang;Wei Zhang;Wei Liu;Xinpu Shen;Wei Zhang;Zhenzhen Yu;Zhili Feng

Geometric effects on competing failure modes in lap shear testing of spot joints

点接头搭接剪切试验中竞争失效模式的几何效应

• 发表时间: 2022
• 期刊: China Welding
• 作者: Tushar, Telmasre;Abdelrahman, Abdelmotagaly;Gao, Yanfei;Yu, Zhenzhen
• 通讯作者: Yu, Zhenzhen

Ductile Braze Repairs for Ni-Based Superalloys Using Novel MPEA Filler Metal

使用新型 MPEA 填充金属对镍基高温合金进行延展性钎焊修复

• DOI: 10.29391/2022.101.007
• 发表时间: 2022
• 期刊: Welding Journal
• 影响因子: 2.2
• 作者: SCHNEIDERMAN, BENJAMIN;DENONNO, OLIVIA;KLEMM-TOOLE, JONAH;YU, ZHENZHEN
• 通讯作者: YU, ZHENZHEN

Influence of oxygen on performance of multi-principal element alloy as braze filler for Ni-base alloys

• DOI: 10.1016/j.jmapro.2023.01.017
• 发表时间: 2023-02
• 期刊: Journal of Manufacturing Processes
• 影响因子: 6.2
• 作者: B. Schneiderman;A. Hansen;A. Chuang;Zhenzhen Yu