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.

研究了经过不同纹理、微观结构和操作滑移系统处理的六方密堆积金属和合金的双轴蠕变行为。 正在研究从幂律到粘性蠕变的过渡蠕变机制以及纹理对这些过渡的影响。 研究人员选择了几种金属和合金来提供质地截然不同的材料。 使用扫描透射电子显微镜确定位错结构并使用光学金相学来辅助滑移痕迹分析来完成微观结构研究。 %%% 这项研究被认为对于金属合金的高温使用以及更好地了解它们在双轴应力下的行为很有价值。 六方密堆积金属用于航空航天和能源行业，这些行业暴露在高温和复杂的负载条件下。 提高对这些条件下蠕变的理解应该会带来利用纹理硬化和预测各向异性变形的技术。