Investigation of Plasticity in Fiber Reinforced Metals using a Model Material

纤维增强金属中由于热膨胀失配引起的位错发射和位错运动以及单向应变时金属基体的滑移变形现象正在研究中。以卤化银(AgCl和AgBr2)为模型材料，研究了金属基复合材料的变形行为。卤化银可以在环境温度下装饰位错，允许弹性应力通过双折射成像是透明的，并以非常类似于金属的方式变形。获得了这些模型系统中应力场和位错结构的三维详细信息。

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.