Abstract
A multi-variable test method, known as the Orthogonal Array, was used to optimize the parameters for the laser gas nitriding process (LGNP) to avoid surface cracking. Based on the fundamental requirement of a crack-free condition, the processing parameters were further optimized to improve the surface finish and to obtain a reasonable hardened depth. The effects of processing parameters have also been investigated with respect to the characteristics of the laser nitrided layer. Two types of lasers, i.e., CO2 and Nd:YAG lasers were used. The CO2 laser was operated in both the continuous as well as the pulse mode, while the Nd:YAG laser was used only in the pulse mode. A Nd:YAG laser in the pulse mode provided a better surface finish and lower cracking severity.
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Xue, L., Islam, M., Koul, A. et al. Laser Gas Nitriding of Ti-6Al-4V Part 1: Optimization of the Process. Advanced Performance Materials 4, 25–47 (1997). https://doi.org/10.1023/A:1008668115226
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DOI: https://doi.org/10.1023/A:1008668115226