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

Published online by Cambridge University Press:  31 January 2011

Fu-Zhen Xuan ,
Li-Qin Cao ,
Zhengdong Wang  and
Shan-Tung Tu
Shan-Tung Tu
Affiliation:
Key Laboratory of Safety Science of Pressurized System, Ministry of Education (Mechanical Education), School of Mechanical Engineering, East China University of Science and Technology, Shanghai 200237, People's Republic of China
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Abstract

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.

Keywords

AlloyLaserNitride
Type
Articles
Information
Journal of Materials Research , Volume 25 , Issue 2 , February 2010 , pp. 344 - 349
Copyright
Copyright © Materials Research Society 2010

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