Deformation Mechanisms of Advanced Structural Materials Studied by Pulsed In-situ Neutron Diffraction

Abstract

Advanced structural materials are anticipated to play a crucial role in the next generation of technologies. To enhance the performance of these materials, it is necessary to elucidate the mechanisms underlying their strength and ductility. This study investigates the contributions of each constituent phase to the strength and ductility of low-alloyed TRIP steel using in-situ neutron diffraction during deformation. The experiments were conducted using the engineering materials diffractometer “TAKUMI” at MLF of J-PARC. Furthermore, advanced welding techniques are critical for ensuring the safe application of these materials. Friction stir welding, a solid-state joining method, produces joints with excellent mechanical properties. However, the deformation mechanisms remain largely unexplored. Thus, this study investigates the deformation behavior of friction stir welded advanced structural materials using in-situ neutron diffraction during tension. In the present paper, several results are presented from these investigations.