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This document summarizes an experimental study on the effects of postweld heat treatment (PWHT) of repair welds in 2-1/4Cr-1Mo superheater headers. Wide plate and standard size specimens were tested in the as-welded and PWHT conditions. Direct measurements of the applied J-integral on wide plates showed that PWHT reduced crack-driving forces from residual stresses and increased weld metal and heat-affected zone toughness. In the as-welded condition, very low toughness values were measured in the HAZ, indica

Author

Muthu Saravanan

Language

EN