Ductility Enhancement Mechanisms in Dislocation-Mobility- Limited Materials

位错迁移率受限材料的延展性增强机制

• 批准号: 9102414
• 负责人: Ronald Gibala
• 金额: $ 43.32万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-08-01 至 1995-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9102414&HistoricalAwards=false
• 关键词: Ductility; Enhancement; Mechanisms; Dislocation; Mobility

This program focusses on enhancement in ductility in body-centered cubic metals where limitations in dislocation mobility exists. Ordered intermetallic alloys and body-centered cubic metals are investigated and compared. Surface film/substrate interfaces and internal precipitate/matrix interfaces are examined under applied static and cyclic stresses. Metal-to-metal, metal-to- intermetallic, and intermetallic-to-intermetallic interfaces are included in the study. Surface film softening phenomena are investigated with the idea to determine what materials respond to this behavior, factors that control it, and effects of cyclic deformation. High resolution transmission electron microscopy and atomic modeling of interfaces will be employed.

该计划的重点是增强体中心 立方金属，其中存在位错移动性的限制。 有序金属间合金和体心立方金属是 调查和比较。 表面膜/基底界面和 内部沉淀物/基体界面进行了检查下应用 静态和循环应力。 金属对金属，金属对 金属间和金属间-金属间界面 包括在研究中。 表面膜软化现象是 调查的想法，以确定什么材料响应 这种行为，控制它的因素，以及循环的影响 变形 高分辨率透射电子显微镜和 将采用接口的原子建模。