Ni-W合金原位拉伸形变的电子背散射衍射分析  

In-situ tensile deformation of Ni-W alloys analyzed by electron backscatter diffraction

作　　者：王丽[1] 田彦宝[1] 张隐奇[1] 吉元[1] 索红利[2] 高忙忙[2] 祝永华[2] 

机构地区：[1]北京工业大学固体微结构与性能研究所,北京100124 [2]北京工业大学材料学院,北京100124

出　　处：《电子显微学报》2008年第6期443-446,共4页Journal of Chinese Electron Microscopy Society

基　　金：国家自然科学基金资助项目(No.69936020);军用模拟集成电路国防科技重点实验室基金资助项目(No.51439040203 QT0101)~~

摘　　要：采用配置在场发射扫描电镜中的电子背散射衍射仪和应变微拉伸仪,统计分析了Ni-W合金在原位单轴拉伸变形过程中,显微结构、晶界分布、晶粒转动及晶体学取向的变化。在形变(ε=22%)过程中,Ni-9%W合金中的大量晶粒转动,产生滑移,并分为亚晶。应变使大角度晶界的含量增加,挛晶界明显减小,晶粒转动量达15°。立方织构(001)[100]随拉伸形变量的增加而减小。The thermal field emission SEM equipped with an electron backscatter diffraction tester and a strain micro-tester was used to statistic analyzing variations in microstructure, grain boundary distribution, lattice orientation rotation and grain orientation of Ni-W alloys during in-situ process of uniaxial tensile deformation. A large number of grains in Ni-9 % W alfoy rotate during deformation process （ε= 22 % ） are divided into sub-grains due to the multiple slip. Because of the strain, the amounts of the high angle boundary increases, the twin boundary remarkable decreases and the lattice orientation increase of 15° in the Ni-9% W alloy. The cubic texture of （001） [ 100] decreases with the increase in the tensile deformation.

关 键 词：原位形变 电子背散射衍射 晶粒转动 晶界特征 

分 类 号：TG146.15[一般工业技术—材料科学与工程]