Investigation of Plasticity in Fiber Reinforced Metals using a Model Material

使用模型材料研究纤维增强金属的塑性

• 批准号: 9002558
• 负责人: Andreas Mortensen
• 金额: --
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-07-15 至 1994-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9002558&HistoricalAwards=false
• 关键词: Investigation; Plasticity; Fiber; Reinforced; Metals

The phenomena of dislocation emission and movement in fiber- reinforced metals due to thermal expansion mismatch and deformation of the metal matrix by slip upon unidirectional straining is under study. Silver halides (AgCl and AgBr) are used as model materials for investigating deformation in metal- matrix composites. Silver halides can decorate dislocations at ambient temperatures, allow elastic stresses to be imaged by birefringence are transparent, and deform in a manner very similar to metals. Detailed information is obtained in three dimensions about the stress field and dislocation structure in these model systems.

研究了纤维增强金属在单向应变作用下由于热膨胀失配和金属基体滑移变形引起的位错发射和运动现象。卤化银（AgCl和AgBr）是研究金属基复合材料变形的模型材料。卤化银可以在环境温度下修饰位错，允许双折射成像的弹性应力是透明的，并且以与金属非常相似的方式变形。得到了这些模型系统中应力场和位错结构的三维详细信息。