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1 results

  • Laser surface nitriding of Ti6Al4V alloy coupled with an external stress field

  • Fu-Zhen Xuan, Li-Qin Cao, Zhengdong Wang, Shan-Tung Tu
  • Journal:
    Journal of Materials Research / Volume 25 / Issue 2 / February 2010
    Published online by Cambridge University Press:
    31 January 2011, pp. 344-349
    Print publication:
    February 2010

  • We report on an approach for laser surface nitriding of Ti6Al4V alloy coupled with an applied stress field. A surprising finding was that, with increasing the applied stress levels, the decreased residual stress, the nitrogen concentration near the surface, and the surface microhardness of the nitrided layer were associated with the increased friction coefficient. Across the depth of the nitrided layer, the hardness, the elastic modulus, and the wear resistance (H/E) measured by nanoindentation decreased gradually and were ascribed to the gradient of nitrogen concentration in the melt zone.