발간논문

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Vol.36, No.3, 356 ~ 362, 1998
Title
Microstructural Evolution and Strain Hardening Behavior of the Cold-Drawn Austenitic Stainless Steels
최점용 , 진원 Jeom Yong Choi , Won Jin
Abstract
The strain induced α′-martensite formation and the strain hardening behavior of metastable austenitic stainless steel during cold drawing have been investigated. The strain induced α′-martensite nucleates mainly at the intersection of the mechanical twins rather than ε-martensite. It could be explained by the increase of stacking fault energy which arises from the heat generated during high speed drawing and, for AISI 304/Cu, the additional effect of Cu additions. The strain hardening behavior of austenitic stainless steel is strongly related to the microstructural evolution accompanied by strain induced α′-martensite. The work hardening rates of cold-drawn 304 increased with increasing interstitial element(C,N) contents which affect the strength of the strain induced α′-martensite.
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