This paper reports an investigation of the machinability of a Ni50.6Ti49.4 alloy by two machining methods: electrical discharge machining and femtosecond laser machining. The electrical discharge wire cutting used resulted in an average surface roughness of similar to 1.2 mu m and a heat-affected layer of 150 mu m depth. In the laser machining, an ultrashort pulse laser with a width of 150 A was used to minimize the effect of laser-generated heat on the surface integrity. This resulted in a much smaller surface roughness of similar to 0.4 mm and a heat-affected layer of only 50 mu m. The two machining methods were compared as regards machined surface integrity.
Huang, H., Zheng, H. Y., & Liu, Y. (2005). Experimental investigations of the machinability of Ni50.6Ti49.4 alloy. Smart Materials and Structures, 14(5), S297-S301. https://doi.org/10.1088/0964-1726/14/5/019