The Superplastic Tensale Instability

【摘要】 <正> 1 Introduction An important character of superplastic tensile is that the macroscopic necking is difficultto occur or it expands slowly. The main parameters affecting the superplastic instabilityare the strain rate sensitivity index m and the strain hardening index n. There have beenmany studies on the superplastic instability and some of them took both the initiation更多还原