DMREF: Collaborative Research: GOALI: Localized Phase Transformation (LPT) Strengthening for Next-Generation Superalloys

DMREF：合作研究：GOALI：下一代高温合金的局部相变 (LPT) 强化

• 批准号: 1922275
• 负责人: Emmanuelle Marquis
• 金额: $ 34.32万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 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: 2019-10-01 至 2023-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1922275&HistoricalAwards=false
• 关键词: DMREF; Collaborative; Research; GOALI; Localized

Extraordinary Properties This Designing Materials to Revolutionize and Engineer our Future (DMREF) Grant Opportunity for Academic Liaison with Industry (GOALI) award supports an integrated experimental and computational effort to accelerate the discovery of new typs of Ni-base superalloys that will have superior high-temperature creep performance, but most likely will have been missed by the traditional trial-and-error method. Ni-base superalloys are critical enabling high-temperature structural materials that determine the efficiency and carbon footprint of a wide range of aerospace and land-based power generation systems such as gas turbines. This effort is an integral part of the national efforts under the Materials Genome Initiative (MGI) and the Integrated Computational Materials Engineering (ICME) initiative. For the first time, superalloy development will be led by computational modeling, mechanistically informed and validated by critical experiments involving novel combinatorial methods for materials processing and state-of-the-art characterization techniques. Because future materials R&D activities, requiring substantially reduced time and cost cycles, must integrate computational materials research with critical experiments, this research project will directly prepare graduate students to immediately contribute to the success of MGI/ICME in industry. Additionally, the training programs for researchers involved in materials development will accelerate the implementation of the new methodology in industry, resulting in increased effectiveness of the US materials technologists. Regarding educational outreach, the present DMREF program will engage undergraduate researchers as mentors who develop K-12 engineering outreach activities encouraging high school students with diverse ethnic backgrounds to enter science and engineering disciplines This DMREF GOALI project will exploit a new design strategy that utilizes a localized phase transformation (LPT) phenomenon to disruptively improve the high-temperature creep performance of Ni-based superalloys. LPTs occur only at extended defects and are confined locally at these defects. By integrating sophisticated computational models, at multiple scales, highly advanced materials characterization techniques, and combinatorial and accelerated methods of materials processing and property evaluation, this project will (a) search the high-dimensional alloy composition space for the occurrence of LPT by high-throughput DFT Monte Carlo calculations, and validate the DFT predictions by novel combinatorial methods to rapidly produce alloys, coupled with advanced electron microscopy and atom probe tomography; (b) establish the connection between defect type (stacking fault, anti-phase boundaries, twins, dislocations and their networks) and the nature of LPT using phase field simulations with the DFT calculations as inputs; (c) quantitatively determine the effect of LPT on the operative deformation mechanisms and develop physics-based deformation models that capture these effects using a combination of the phase field method and a mechanism-sensitive crystal plasticity model, which will enable direct validation against polycrystalline creep experiments; and (d) employ novel processing routes to stabilize high dislocation/twin density microstructures by LPT, thereby providing a new strengthening mechanism for deployment to superalloys. The GOALI partner of this project, GE Research, will respond to alloy recommendations by providing high quality alloys in single crystal and polycrystal forms. Such an integrated research effort will raise significantly the state-of-the-art in the discovery and development of new superalloys and is expected to result in new science in alloy design. The focus on superalloys will have a marked impact on a broad range of advanced technological areas including aerospace, transportation and energy.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.

这种设计材料具有非凡的特性，以彻底改变和设计我们的未来（DMREF）与行业联络人（Goari）奖的授予机会，支持了一项综合的实验和计算工作，以加快NI基本超级合金的新类型的发现，这些合金将具有出色的高度蠕变性能，但很可能会被传统的试验试验和ERROR MADEAT遗漏。 Ni-Base Superalloys是至关重要的，实现了高温结构材料，这些材料决定了广泛的航空航天和陆基发电系统（例如燃气轮机）的效率和碳足迹。这项工作是材料基因组倡议（MGI）和集成计算材料工程（ICME）计划的国家努力不可或缺的一部分。 Superalloy开发将首次由计算建模来领导，并通过涉及材料加工和最新表征技术的新型组合方法的关键实验进行了机械知识和验证。由于未来的材料研发活动需要大幅减少时间和成本周期，必须将计算材料研究与关键实验整合在一起，因此该研究项目将直接为研究生做好准备，以立即为MGI/ICME在行业中的成功做出贡献。此外，针对参与材料开发的研究人员的培训计划将加速行业中新方法的实施，从而提高美国材料技术人员的有效性。 Regarding educational outreach, the present DMREF program will engage undergraduate researchers as mentors who develop K-12 engineering outreach activities encouraging high school students with diverse ethnic backgrounds to enter science and engineering disciplines This DMREF GOALI project will exploit a new design strategy that utilizes a localized phase transformation (LPT) phenomenon to disruptively improve the high-temperature creep performance of Ni-based superalloys. LPT仅发生在扩展的缺陷处，并在这些缺陷处局部局部限制。 By integrating sophisticated computational models, at multiple scales, highly advanced materials characterization techniques, and combinatorial and accelerated methods of materials processing and property evaluation, this project will (a) search the high-dimensional alloy composition space for the occurrence of LPT by high-throughput DFT Monte Carlo calculations, and validate the DFT predictions by novel combinatorial methods to rapidly produce alloys, coupled with advanced electron显微镜和原子探针断层扫描； （b）在缺陷类型（堆叠故障，反相边界，双胞胎，错位及其网络）之间建立连接与使用相位场仿真（以DFT计算为输入）的LPT的性质； （c）定量确定LPT对手术变形机制的影响，并开发基于物理的变形模型，该模型使用相位场方法的组合和对机理敏感的晶体可塑性模型捕获这些效果，该模型将对多晶型蠕变实验进行直接验证； （d）采用新颖的加工途径来通过LPT稳定高位脱位/双密度微观结构，从而为超合金提供了新的增强机制。该项目的目标合作伙伴GE Research将通过提供单晶和多晶形式的高质量合金来回应合金建议。这样的综合研究工作将大大提高新超级合金发现和开发的最新作品，并有望在合金设计中获得新的科学。对超级合金的关注将对广泛的高级技术领域产生显着影响，包括航空航天，运输和能源。该奖项反映了NSF的法定任务，并且使用基金会的知识分子优点和更广泛的影响审查标准，认为值得通过评估来获得支持。

项目成果

Dynamic localized phase transformation at stacking faults during creep deformation and new criterion for superalloy design

• DOI: 10.1557/s43579-022-00251-z
• 发表时间: 2022-09
• 期刊: MRS Communications
• 影响因子: 1.9
• 作者: Longsheng Feng;A. Egan;Fei-Fei Xue-Fei;E. Marquis;Michael J. Mills;Yunzhi Wang

Local Phase Transformation Strengthening at Microtwin Boundaries in Nickel-Based Superalloys

• DOI: 10.1016/j.actamat.2022.118206
• 发表时间: 2022-08-06
• 期刊: ACTA MATERIALIA
• 影响因子: 9.4
• 作者: Egan, A. J.;Xue, F.;Mills, M. J.
• 通讯作者: Mills, M. J.