Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Effect of Mo Addition on the Austenite Stability of Nanocrystalline Fe-7wt.%Mn Alloy Fabricated by Spark Plasma Sintering

방전 플라즈마 소결로 제조된 나노결정 Fe-7wt.%Mn 합금의 오스테나이트 안정성에 미치는 Mo 첨가 효과

  • Woochul, Shin (Division of Advanced Materials Engineering, Jeonbuk National University) ;
  • Seung Bae, Son (Division of Advanced Materials Engineering, Jeonbuk National University) ;
  • Jae-Gil, Jung (Division of Advanced Materials Engineering, Jeonbuk National University) ;
  • Seok-Jae, Lee (Division of Advanced Materials Engineering, Jeonbuk National University)
  • 신우철 (전북대학교 신소재공학부) ;
  • 손승배 (전북대학교 신소재공학부) ;
  • 정재길 (전북대학교 신소재공학부) ;
  • 이석재 (전북대학교 신소재공학부)
  • Received : 2022.12.09
  • Accepted : 2022.12.27
  • Published : 2022.12.28
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Abstract

We investigate the austenite stability in nanocrystalline Fe-7%Mn-X%Mo (X = 0, 1, and 2) alloys fabricated by spark plasma sintering. Mo is known as a ferrite stabilizing element, whereas Mn is an austenite stabilizing element, and many studies have focused on the effect of Mn addition on austenite stability. Herein, the volume fraction of austenite in nanocrystalline Fe-7%Mn alloys with different Mo contents is measured using X-ray diffraction. Using a disk compressive test, austenite in Fe-Mn-Mo alloys is confirmed to transform into strain-induced martensite during plastic deformation by a disk d. The variation in austenite stability in response to the addition of Mo is quantitatively evaluated by comparing the k-parameters of the kinetic equation for the strain-induced martensite transformation.

Keywords

Acknowledgement

This work was supported by a Korea Institute for Advancement of Technology grant, funded by the Korea Government (MOTIE) (P0002019), as part of the Competency Development Program for Industry Specialists.

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