Materials World Network: Understanding the Microstructural Evolution and Deformation Behavior in Mg-Mn-RE Alloys

材料世界网络：了解 Mg-Mn-RE 合金的微观结构演变和变形行为

• 批准号: 1107117
• 负责人: Carl Boehlert
• 金额: $ 31.2万
• 依托单位: Michigan State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-08-15 至 2016-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1107117&HistoricalAwards=false
• 关键词: Materials; World; Network; Understanding; Microstructural

This collaborative research between the Universidad Politecnica de Madrid (UPM, Spain), IMDEA Materials Institute (Madrid, Spain), and Michigan State University (MSU) combines an experimental and computational plan to study the microstructural evolution during processing and the damage nucleation and progression that occurs due to mechanical deformation in magnesium-manganese-rare earth (Mg-Mn-RE) alloys. Microstructural characterization is performed in order to develop a crystallographically-based understanding of how details of the deformation behavior correlate with grain nucleation and grain growth during processing and damage nucleation during ambient and elevated-temperature tension and creep experiments. In-situ tensile and tensile-creep experiments performed inside a scanning electron microscope allow for the identification of the initial damage events and deformation progression as well as the deformation evolution. Simulations of experimentally-characterized microstructures provide a means to interpret and analyze the quantitative experimental data. The details of deformation processes that cause damage are quantitatively identified. Such details provide the framework for introducing damage nucleation and deformation evolution information into microstructural models. The methodology developed integrates material and component design by developing predictive capabilities that link microstructural response with macrostructure performance.This work seeks to overcome one of the most challenging aspects of structural alloys, increasing ambient and elevated-temperature strength and creep resistance while maintaining ductility. Other aspects of the work entail producing educational modules on processing and characterization of Mg alloys, expanding an established K-12 outreach program at MSU so that it can reach more K-12 students in the USA and Spain through remote operation of a SEM, providing research opportunities for undergraduate students involved in existing MSU programs as well as those to be involved in the study abroad program between MSU and the UPM. The educational modules are intended to promote materials education of Mg alloys. They are appropriate for inclusion in K-12 curriculum, and are created both in English and Spanish, the latter of which can be used not only in Spain but also in Spanish-speaking communities in the USA. Overall, the proposed international effort is intended to make a lasting effect by understanding processing-microstructure-property relationships of novel Mg-Mn-RE alloys, while also educating young scientists.

这项由西班牙马德里理工大学（UPM）、IMDEA材料研究所（西班牙马德里）和密歇根州立大学（MSU）合作开展的研究，结合了实验和计算计划，研究了镁锰稀土（Mg-Mn-RE）合金在加工过程中的微观结构演变以及由于机械变形而发生的损伤成核和进展。 进行微观结构表征，以开发一个晶体学为基础的理解，变形行为的细节如何与晶粒成核和晶粒生长过程中的处理和损伤成核在环境和高温拉伸和蠕变实验。 在扫描电子显微镜内进行的原位拉伸和拉伸蠕变实验允许识别的初始损伤事件和变形进展以及变形演变。 实验表征的微观结构的模拟提供了解释和分析定量实验数据的手段。 定量地确定了造成损伤的变形过程的细节。 这些细节提供了框架，引入损伤成核和变形演化信息的微观结构模型。 开发的方法通过开发将微观结构响应与宏观结构性能联系起来的预测能力来集成材料和组件设计。这项工作旨在克服结构合金最具挑战性的方面之一，提高环境和高温强度和抗蠕变性，同时保持延展性。 工作的其他方面包括制作关于镁合金加工和表征的教育模块，扩大密歇根州立大学的K-12推广计划，以便通过远程操作SEM可以接触到美国和西班牙的更多K-12学生，为参与现有MSU课程的本科生提供研究机会，以及参与MSU和UPM之间的海外留学项目的学生。 教学模块旨在促进镁合金材料教育。 它们适合纳入K-12课程，并以英语和西班牙语创建，后者不仅可以在西班牙使用，也可以在美国的西班牙语社区使用。 总体而言，拟议的国际努力旨在通过了解新型Mg-Mn-RE合金的加工-显微组织-性能关系，同时教育年轻科学家，产生持久的影响。