晶须增强金属复合材料电镜样品中的弹性弛豫

晶须增强金属复合材料电镜样品中的弹性弛豫 ELASTIC RELAXATION IN THE THIN FOIL FOR TRANSMISSION ELECTRON MICROSCOPY OF WHISKER REINFORCED METALLIC COMPOSITE 洪小斌 Hong Xiaobin 1) 1 2 3 first-author 邹化民 Zou Huamin 1) 1 2 3 潘进 Pan Jin 2) 1 2 3 高腊梅 Gao Lamei 1) 1 2 3 武汉大学物理学系 武汉大学物理学系 1 Department of Physics, Wuhan University 1 Department of Physics, Wuhan University 国防科技大学材料工程与应用化学系 国防科技大学材料工程与应用化学系 武汉大学物理学系国防科技大学材料工程与应用化学系 武汉大学物理学系国防科技大学材料工程与应用化学系 用有限元数值计算的方法研究了晶须增强金属复合材料电镜样品中，自由表面引起的弹性弛豫对材料中界面附近弹性应变的影响，利用电子衍射动力学理论模拟了这种弹性应变引起的会聚束电子衍射图中衍射线的宽化与分裂情况，计算结果与实验相符．并讨论了由薄膜样品中弹性应变的测定结果推算出大的块体复合材料中界面微观应变场的可能性 The effect of elastic relaxation on the elastic microstrain in the vicinity of interface in whisker reinforced metallic composite due to the stress free surfaces of TEM sample was investigated by means of finite element method. The broadening and splitting of diffraction lines in convergent beam electron diffraction patterninducedbytheeffect were simulated with the dynamic theory of electron diffraction. The simulation coincides with the experimental observation. The way getting the interface microstrain in a bulk material of composite from the interface microstrain obtained with a thin foil of the identical composite was discussed. 复合材料 弹性弛豫 有限元法 会聚束电子衍射 composite elastic relaxation finite element method Convergent beam electron diffraction TG113.23 国家自然科学基金(61672102) 1997-01-01 2021-04-01 1