2026 Rozas Strain Induced Martensite Tensile

This research investigates the effects of temperature and speed on the formation of strain-induced martensite in AISI 304L and 316L stainless steels through standardized tensile tests. The objective was to evaluate differences in mechanical properties related to variations in test parameters as established by ASTM and ISO standards. Experimental tensile tests were conducted at temperatures ranging from 10°C to 35°C, with strain rates from 2.5 x 10^-4 to 3 x 10^-4 s^-1, and post-yield strain rates from 8.3 x 10^-4 to 7.5 x 10^-3 s^-1. The study measured the generation of martensitic phase due to plastic deformation, along with the α-martensite content as a function of distance from the fracture zone. Results indicated a significant trend toward martensitic transformation in AISI 304L with strength variations exceeding 200 MPa (around 30 percent) between the parameter limits, while AISI 316L showed strength differences up to 70 MPa (more than 10 percent). These findings underscore the importance of testing parameters in determining the mechanical behavior of these alloys under strain.