Interaction and multiscale mechanics

  • 제1권4호
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  • Pages.411-422
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  • 2008
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  • 1976-0426(pISSN)
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  • 2092-6200(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Atomistic simulation and investigation of nanoindentation, contact pressure and nanohardness

  • Chen, Chuin-Shan (Department of Civil Engineering, National Taiwan University) ;
  • Wang, Chien-Kai (Department of Civil Engineering, National Taiwan University) ;
  • Chang, Shu-Wei (Department of Civil Engineering, National Taiwan University)
  • 투고 : 2008.10.09
  • 심사 : 2008.11.24
  • 발행 : 2008.12.25
⟨ 이전 논문 다음 논문 ⟩

초록

Atomistic simulation of nanoindentation with spherical indenters was carried out to study dislocation structures, mean contact pressure, and nanohardness of Au and Al thin films. Slip vectors and atomic stresses were used to characterize the dislocation processes. Two different characteristics were found in the induced dislocation structures: wide-spread slip activities in Al, and confined and intact structures in Au. For both samples, the mean contact pressure varied significantly during the early stages of indentation but reached a steady value soon after the first apparent load drop. This indicates that the nanohardness of Al and Au is not affected by the indentation depth for spherical indenters, even at the atomistic scale.

키워드

과제정보

연구 과제 주관 기관 : National Science Council

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