Enhanced Low-Temperature Tensile Properties of Fe-14Cr-(4∼9)Ni Weld Metal by Retained Austenite

Abstract

Retained austenite affects the low-temperature tensile properties of Fe-14Cr-(4∼9)Ni weld metal through strain-induced martensite transformation. The strengthening process caused by strain-induced martensite transformation is evaluated in terms of work-hardening-rate. By means of this result, the effect of retained austenite on elongation is interpreted. Strength-ductility balance is found to be strongly influenced by retained austenite at low temperature.