열처리공학회지 (Journal of the Korean Society for Heat Treatment)

  • 제36권5호
  • /
  • Pages.277-284
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  • 2023
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  • 1225-1070(pISSN)
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  • 2508-4046(eISSN)
한국열처리공학회 (The Korean Society for Heat Treatment)
권호 표지
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T6 열처리 및 저온 장시간 등온 시효한 Mg-Al 합금의 경도 및 진동감쇠능 비교

Comparison of Hardness and Damping Capacities of Mg-Al Alloy Subjected to T6 Heat Treatment and Low Temperature Long Term Isothermal Aging

  • 전중환 (한국생산기술연구원 산업소재공정연구부문)
  • Joong-Hwan Jun (Industrial Materials Processing R&D Department, Korea Institute of Industrial Technology)
  • 투고 : 2023.08.31
  • 심사 : 2023.09.13
  • 발행 : 2023.09.30
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초록

Hardness and damping characteristics of fine discontinuous precipitates (DPs) microstructure generated by low temperature long term isothermal aging were investigated in comparison with those of T6 heat-treated microstructure composed of DPs and continuous precipitates (CPs) in Mg-9%Al alloy. In this study, T6 and fine DPs microstructures were obtained by isothermal aging at 453 K for 24 h and at 413 K for 336 h, respectively, after solution treatment at 693 K for 24 h. The DPs microstructure exhibited higher hardness than the T6 microstructure, which is related to the lower (α + β) interlamellar spacing of the DPs. The DPs microstructure possessed better damping capacity than the T6 microstructure in the strain-amplitude independent region, whereas in the strain-amplitude dependent region, the reverse behavior was observed. The damping tendencies depending on strain-amplitude were discussed based on the microstructural features of the T6 and DPs microstructures.

키워드

과제정보

이 성과는 정부(과학기술정보통신부)의 재원으로 한국연구재단의 지원을 받아 수행된 연구임(No. 2021R1F1A1049912).

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