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大块Al单晶裂尖前方无位错区的研究
THE DISLOCATIOIN-FREE ZONE AHEAD OF THE CRACK TIP IN BULK ALUMINIUM SINGLE CRYSTALS
【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。
【Abstract】 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.
【关键词】 位错;
裂纹;
无位错区;
Riec-Thomson模型;
【Key words】 dislocation; crack; dislocation-free zone; Rice-Thomson model;
【Key words】 dislocation; crack; dislocation-free zone; Rice-Thomson model;
- 【文献出处】 材料科学进展 , 编辑部邮箱 ,1990年03期
- 【被引频次】2
- 【下载频次】40