Study on improving the surface hardness of TiAl alloy by laser nitriding in an atmospheric ambient

Yuling Yang; Changsheng Liu; Wei Yan; Duo Zhang

doi:10.1117/12.667197

27 December 2005 Study on improving the surface hardness of TiAl alloy by laser nitriding in an atmospheric ambient

Yuling Yang, Changsheng Liu, Wei Yan, Duo Zhang

Proceedings Volume 6028, ICO20: Lasers and Laser Technologies; 60281M (2005) https://doi.org/10.1117/12.667197
Event: ICO20:Optical Devices and Instruments, 2005, Changchun, China

Abstract

Laser nitridation in an atmospheric ambient was applied to improve the surface hardness of Titanium alloy. The samples were nitrided with laser power density of 6.5×10⁵ w.cm^-2, the scanning speed of 100mm.min^-1. The nitrogen gas was pre-heated to 300^oC to accelerate the nitriding process. Some interested samples were tested with XRD method to analyze the composition of nitrides, and the surface hardness of HV was measured. The results show that TiN and Ti₂N were formed on the surface of Ti alloy with proper nitriding parameters, but TiN is the main composition. The surface hardness increased by three times, that is from the original value of 269 Kg.mm^-2 to 794Kg.mm^-2.

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Yuling Yang, Changsheng Liu, Wei Yan, and Duo Zhang "Study on improving the surface hardness of TiAl alloy by laser nitriding in an atmospheric ambient", Proc. SPIE 6028, ICO20: Lasers and Laser Technologies, 60281M (27 December 2005); https://doi.org/10.1117/12.667197

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KEYWORDS

Titanium

Nitrogen

Tin

Laser processing

Thin film coatings

Plasma

Atmospheric sciences

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