Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : March 04, 2023
Ti alloys are metallic materials with excellent properties such as high specific strength and corrosion resistance. However, the deformation mechanism is extremely complex, and there are many unresolved points concerning the microscopic deformation mechanism. In this study, crystal plasticity analysis was performed to investigate the redistribution mechanism of stress and strain between regions with deformation. The results showed that, in the early stage of deformation, slip began in areas where the Schmid factor was high, and the high strain regions were discontinuous at this stage. However, in the later stage of deformation, strain increased even in areas where the Schmid factor was not high, leading to formation of band-like high strain regions (HSBs). The cause of this was the development of multiaxial stresses with deformation, and in addition to normal stress in the tensile direction, other stress components had a significant effect on the formation of HSBs.
