摘要
选用高纯度Ni单晶体,利用扫描电镜原位拉伸,观察了充氢后Ni单晶裂纹尖端的变形过程。发现氢的存在不改变在混合型载荷作用下,裂纹尖端的塑性变形特征。用网格法加计算机处理系统,测出氢显著促进裂纹尖端区域内的局部塑性变形。
The deformation process and the strain field ahead of crack tip in Ni
single crystal have been studied under SEM, and by grid method as well as compu-
ter image processing. The presence of hydrogen extends the localized plastic band
inhomogeneous further and significantly increases the plasticity in high deep strain
area.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1991年第1期A044-A048,共5页
Acta Metallurgica Sinica
关键词
金属
断裂
裂纹尖端
变形
氢致开裂
crack tip defromation
strain field
hydrogen inducing crack
