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jin shu kong dong duan lie mo xing
Author(s): 
Pages: 14-20
Year: 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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