Effect of nitrogen addition on tensile behavior of austenitic stainless steels studied by neutron scattering (Application of neutron scattering on steel research: Part 16)

摘要

Nitrogen addition to austenitic stainless steels improves various mechanical properties. Especially, nitrogen addition increases the yield strength and work hardening in tensile behavior. Recent researches have revealed that nitrogen addition increases thermal stress component as well as athermal stress. By an atom probe analysis, a pair of nitrogen atom and molybdenum was found. However, the strengthening mechanism and microstructure like nano-sized cluster has not been made clear. In this study, we studied this topic by using neutron small angle scattering (SANS) and in-situ neutron diffraction during tensile deformation.