Anisotropic Creep and Deformation of Textured HCP Metals

织构 HCP 金属的各向异性蠕变和变形

• 批准号: 9105178
• 负责人: K. Linga Murty
• 金额: $ 29.52万
• 依托单位: North Carolina State University
• 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: 1991-09-01 至 1995-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9105178&HistoricalAwards=false
• 关键词: Anisotropic; Creep; Deformation; Textured; HCP

Biaxial creep behavior is studied in hexagonal close packed metals and alloys that have been processed with varied textures, microstructures, and operating slip systems. Investigations on the transitional creep mechanisms from power law to viscous creep and the effects of texture on these transitions are being examined. Several metals and alloys have been selected for the studies to provide materials with vastly different textures. Microstructural studies are accomplished using scanning transmission electron microscopy to determine dislocation structures and optical metallography to aid in slip trace analysis. %%% The research is seen as valuable to the high temperature use of metal alloys and for better understanding of their behavior under biaxial stresses. Hexagonal close packed metals are used in aerospace and energy industries where they are exposed to high temperatures and complex loading conditions. Improved understanding of creep under these conditions should lead to techniques to take advantage of textural hardening and to predict anisotropic deformation.

研究了六方密排金属的双轴蠕变行为 以及经过不同纹理处理的合金， 微观结构和操作滑动系统。 调研 从幂律蠕变到粘性蠕变的过渡蠕变机制， 正在研究纹理对这些转变的影响。 选择了几种金属和合金进行研究， 提供具有截然不同纹理的材料。 微结构 使用扫描透射电子显微镜完成研究。 显微镜来确定位错结构和光学 金相分析，以帮助滑移痕迹分析。 %%% 该研究对高温下使用 金属合金和更好地了解他们的行为下 双轴应力 Hiscononal紧密堆积金属用于 航空航天和能源行业，他们暴露在高 温度和复杂的负载条件。 改进 对这些条件下的蠕变的理解应该导致 利用组织硬化的技术， 各向异性变形