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Molecular dynamic simulation of effect of crystallographic orientation on nano-indentation/scratching behaviors of BCC iron

Conference Paper


Abstract


  • "A molecular dynamics model has been developed to investigate the effect of the crystallographic orientation on the material deformation behaviors in nano- indentation/scratching of BCC iron. Two cases with different substrate orientations have been simulated. The orientations along x, y and z direction are [001], [100] and [010] for Case I and [111], [-1-12] and [1-10] for Case II, respectively. Case I and Case II exhibit different deformation patterns in the substrate. During indentation, the pile-up can be observed in Case I, but not in Case II. During scratching the pile-up ahead of the movement of the indenter has been enlarged in Case I, while a chip with the disordered atoms is generated in Case II. It has been found that Case I has both higher hardness and larger coefficient of friction. The ratios of the hardness and the coefficient of friction between cases I and II are nearly 2. The reason is attributed to the different crystallographic orientations used in both cases."

Publication Date


  • 2009

Citation


  • Lu, C., Gao, Y., Michal, G., Zhu, H., Huynh, N. N. & Tieu, A. K. (2009). Molecular dynamic simulation of effect of crystallographic orientation on nano-indentation/scratching behaviors of BCC iron. 5th China International Symposium on Tribology/1st International Tribology Symposium of IFToMM (pp. 562-563). TSINGHUA UNIVERSITY PRESS.

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/4937

Start Page


  • 562

End Page


  • 563

Abstract


  • "A molecular dynamics model has been developed to investigate the effect of the crystallographic orientation on the material deformation behaviors in nano- indentation/scratching of BCC iron. Two cases with different substrate orientations have been simulated. The orientations along x, y and z direction are [001], [100] and [010] for Case I and [111], [-1-12] and [1-10] for Case II, respectively. Case I and Case II exhibit different deformation patterns in the substrate. During indentation, the pile-up can be observed in Case I, but not in Case II. During scratching the pile-up ahead of the movement of the indenter has been enlarged in Case I, while a chip with the disordered atoms is generated in Case II. It has been found that Case I has both higher hardness and larger coefficient of friction. The ratios of the hardness and the coefficient of friction between cases I and II are nearly 2. The reason is attributed to the different crystallographic orientations used in both cases."

Publication Date


  • 2009

Citation


  • Lu, C., Gao, Y., Michal, G., Zhu, H., Huynh, N. N. & Tieu, A. K. (2009). Molecular dynamic simulation of effect of crystallographic orientation on nano-indentation/scratching behaviors of BCC iron. 5th China International Symposium on Tribology/1st International Tribology Symposium of IFToMM (pp. 562-563). TSINGHUA UNIVERSITY PRESS.

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/4937

Start Page


  • 562

End Page


  • 563