Influence of austenitizing temperature on microstructure and mechanical properties of AISI 431 martensitic stainless steel electron beam welds

The relative effects of various austenitizing temperatures on microstructure and mechanical properties of electron beam welds of AISI 431martensitic stainless steel were studied. The post-weld heat treatments consist of austenitizing the weld samples for 1 h at various temperatures, i.e., at 950 °C, 1000 °C, 1050 °C, 1100 °C and at 1150 °C and air cooling followed by double tempering, i.e., tempering at 670 + 600 °C. In the as-welded condition...