Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Effect of Sintering Condition on Tensile Strength of Fe-based Non-equiatomic High Entropy Alloy

철계 비동일분율 고엔트로피 합금의 인장 강도에 미치는 소결 조건 영향

  • Seo, Namhyuk (Division of Advanced Materials Engineering, Research Center for Advanced Materials Development, Jeonbuk National University) ;
  • Jeon, Junhyub (Division of Advanced Materials Engineering, Research Center for Advanced Materials Development, Jeonbuk National University) ;
  • Kim, Gwanghun (Division of Advanced Materials Engineering, Research Center for Advanced Materials Development, Jeonbuk National University) ;
  • Park, Jungbin (Division of Advanced Materials Engineering, Research Center for Advanced Materials Development, Jeonbuk National University) ;
  • Son, Seung Bae (Division of Advanced Materials Engineering, Research Center for Advanced Materials Development, Jeonbuk National University) ;
  • Lee, Seok-Jae (Division of Advanced Materials Engineering, Research Center for Advanced Materials Development, Jeonbuk National University)
  • 서남혁 (전북대학교 신소재공학부) ;
  • 전준협 (전북대학교 신소재공학부) ;
  • 김광훈 (전북대학교 신소재공학부) ;
  • 박정빈 (전북대학교 신소재공학부) ;
  • 손승배 (전북대학교 신소재공학부) ;
  • 이석재 (전북대학교 신소재공학부)
  • Received : 2021.05.27
  • Accepted : 2021.06.26
  • Published : 2021.06.28
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Abstract

We fabricate the non-equiatomic high-entropy alloy (NE-HEA) Fe49.5Mn30Co10Cr10C0.5 (at.%) using spark plasma sintering under various sintering conditions. Each elemental pure powder is milled by high-energy ball milling to prepare NE-HEA powder. The microstructure and mechanical properties of the sintered samples are investigated using various methods. We use the X-ray diffraction (XRD) method to investigate the microstructural characteristics. Quantitative phase analysis is performed by direct comparison of the XRD results. A tensile test is used to compare the mechanical properties of small samples. Next, electron backscatter diffraction analysis is performed to analyze the phase fraction, and the results are compared to those of XRD analysis. By combining different sintering durations and temperature conditions, we attempt to identify suitable spark plasma sintering conditions that yield mechanical properties comparable with previously reported values. The samples sintered at 900 and 1000℃ with no holding time have a tensile strength of over 1000 MPa.

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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