TEM study of microcrack nucleation and propagation for 310 stainless steel

被引：0

作者：

Li, HQ ^{[1
]}

Chen, QZ ^{[1
]}

Huang, YZ ^{[1
]}

Wang, YB ^{[1
]}

Chu, WY ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, Sch Appl Sci, Beijing 100083, Peoples R China

来源：

JOURNAL OF UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING | 1998年 / 5卷 / 02期

关键词：

310 stainless steel; in situ TEM tension; dislocation free zone; initiation of nanocrack;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

TEM in situ tensile tests of 310 stainless steel show that a dislocation free zone (DFZ) forms if the displacement keeps constant after dislocations are emitted from a crack tip. The elastic DFZ is gradually thinned and the stress in the DFZ will reach the cohesive strength, resulting in nucleation of nanocracks in it and their bluntness into voids. If continuously tensioning, the inhomogeneously thinning ahead of the crack tip, initiating and connecting of microcracks or microvoids will be observed rather than a DFZ, nanocracks' initiation and bluntness into voids. The inverse pile-up ahead of a loaded crack tip can move back to the crack tip when unloading.

引用

页码：100 / 103

页数：4

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