Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
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Tensile Properties of High Mn Austenitic Stainless Steel with Two Phases of Martensite and Austenite

마르텐사이트와 오스테나이트의 2상 조직을 갖는 고 Mn 오스테나이트계 스테인리스강의 인장성질

  • Kim, Young-Hwa (Department of Metallurgical Engineering, Pukyong National University) ;
  • Kang, Chang-Yong (Department of Metallurgical Engineering, Pukyong National University)
  • 김영화 (부경대학교 금속공학과) ;
  • 강창룡 (부경대학교 금속공학과)
  • Received : 2013.06.01
  • Accepted : 2013.08.12
  • Published : 2013.08.31
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Abstract

The tensile properties of high manganese austenitic stainless steel with the two phase structures of deformation-induced martensite and reversed austenite were studied. Reversed austenite with an ultra-fine grain size of less than $0.3{\mu}m$ was obtained by reversion treatment. The two phases structures of deformation-induced martensite and reversed austenite were obtained by an annealing treatment in the range of $500^{\circ}C-700^{\circ}C$ for various times in 70% cold- rolled high-manganese austenitic stainless steel. The volume fraction of the reversed austenite increased rapidly with increases in the annealing temperature and time. In the stainless steel with the two phases of austenite and martensite, the strength decreased rapidly, while the elongation increased slowly and then rapidly increased with an increase in the volume fraction of the reversed austenite. Therefore, the strength and elongation were strongly controlled by the volume fraction of reversed austenite. A good combination of high strength and elongation could be obtained by the mixed structure of reversed austenite and deformation-induced martensite.

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References

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