摘要
加载后在大块 Al 单晶试样的Ⅰ型预制裂纹尖端出现无位错区。分析表明,此无位错区有三维结构特点,这一结论可用 Pseudo Kosel 照像法直接证实。提出一新的无位错区形成机制,并加以讨论。
After loading a distocation-free zone(DFZ)was found in model Ⅰprecracked bulk Al single crystals.It was shown by analysis that DFZ has its own threedimensional characteristics,this conclusion was verified directly by a Pseudo Kossel meth-od.A new formation mechanism of DFZ was proposed and discussed in detail.
出处
《材料科学进展》
EI
CAS
CSCD
1990年第3期206-211,共6页
关键词
AL
单晶裂纹
无位错区
dislocation
crack
dislocation-free zone
Rice-Thomson model
