Alloy design of welding filler metal for 9Cr/2.25Cr dissimilar welded joint and mechanical properties investigation

In the work, a 5%Cr weld metal for the 9Cr/2.25Cr dissimilar welded joint was designed. The creep rupture, tensile, and impact behaviors of the weld metal and welded joint were tested and compared with those of the dissimilar welded joint with the 2.25%Cr weld metal. The result showed that the alloy design of the 5%Cr weld metal had a significant effect on reducing the degree of carbon migration at the joint interface. The interfacial creep...