대한금속재료학회지 (Korean Journal of Metals and Materials)

  • 제48권9호
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  • Pages.807-812
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  • 2010
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  • 1738-8228(pISSN)
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  • 2288-8241(eISSN)
대한금속재료학회 (The Korean Institute of Metals and Materials)
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초음파 나노표면개질 공정기술에 의한 AISI304 스테인리스강의 표면나노구조화 및 압축잔류응력 형성

Formation of Nano-structure and Compressive Residual Stress on AISI304 Stainless Steel by Ultrasonic Nanocrystalline Surface Modification

  • 조인식 (선문대학교 하이브리드공학과) ;
  • 동계령 (창원대학교 나노.신소재공학부) ;
  • 유대황 (창원대학교 나노.신소재공학부) ;
  • 서정화 (창원대학교 나노.신소재공학부) ;
  • 아마노프 (선문대학교 기계공학과) ;
  • 신기삼 (창원대학교 나노.신소재공학부) ;
  • 이창순 (선문대학교 하이브리드공학과) ;
  • 편영식 (선문대학교 기계공학과) ;
  • 박인규 (선문대학교 하이브리드공학과)
  • 투고 : 2010.02.12
  • 발행 : 2010.09.22
⟨ 이전 논문 다음 논문 ⟩

초록

In this paper, the Ultrasonic Nanocrystalline Surface Modification (UNSM) surface treatment process was used to induce compressive residual stress and nanocrystalline structure by severe plastic deformation on the UNSM-treated surface. The test results for AISI304 stainless steel demonstrated that the grain size was found to be 23 nm, the dislocation density was increased by $0.2085{\times}10^{18}\;m^{-2}$, and the volume fraction of martensite is defined as 27.6% from austenite so that the surface hardness of the surface is increased from 200 Hv up to 515 Hv. The initial tensile residual stress is changed from 300 MPa to a compressive residual stress of 500 MPa after UNSM treatment. In addition, UNSM was applied under five various conditions, and the results of those conditions were defined as a function of depth quantitative.

키워드

과제정보

연구 과제 주관 기관 : 나노소재기술개발사업단

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