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Metallurgical and Materials Transactions A

, Volume 31, Issue 11, pp 2735–2738 | Cite as

Effects of thermal cycling on the kinetics of the γε martensitic transformation in an Fe-17 wt pct Mn alloy

  • Young-Kook Lee
  • Chong-Sool Choi
Article

Abstract

The thermal cycling of an Fe-17 wt pct Mn alloy between 303 and 573 K was performed to investigate the effects of thermal cycling on the kinetics of the γε martensitic transformation in detail and to explain the previous, contrasting results of the change in the amount of ε martensite at room temperature with thermal cycling. It was observed that the shape of the γε martensitic transformation curve (volume fraction vs temperature) changed gradually from a C to an S curve with an increasing number of thermal cycles. The amount of ε martensite of an Fe-17 wt pct Mn alloy at room temperature increased with thermal cycling, in spite of the decrease in the martensitic start (M s) temperature. This is due to the increase in transformation kinetics of ε martensite at numerous nucleation sites introduced in the austenite during thermal cycling.

Keywords

Austenite Martensite Material Transaction Thermal Cycling Martensitic Transformation 
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Copyright information

© The Minerals, Metals & Materials Society - ASM International - The Materials Information Society 2000

Authors and Affiliations

  • Young-Kook Lee
    • 1
  • Chong-Sool Choi
    • 2
  1. 1.the Division of EngineeringColorado School of MinesGolden
  2. 2.the Department of Metallurgical EngineeringYonsei UniversitySeoulKorea

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