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jin shu kong dong duan lie mo xing
Author(s): Chen Hechun Yang Zhenheng
Pages: 14-
20
Year: 1986
Issue:
4
Journal: Materials Science and Technology
Keyword: 空洞长大; 空洞形核; 过饱和空位; 临界变形量; 位错塞积群; 表面能; 应力场; 表面张力; 实验现象; 金属;
Abstract: This paper analyzes the nucleation mechanism of cavities according to author's study of over-saturated vacancy under the action of dislocation pile-up stress, and derives a formula of critical strain(ε*).It also discusses the effects of the oversaturated vacancy,surface tension and concentrated stress at hole edge on the cavity growth, and presents a formula of cavity growth speed (dv/dt).Finally it explains the phenomena occurring in the experiments,the formation of necking,the joining of cavities and so on.
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