The influence of post-weld heat treatment on microstructure of TC4 weld joints

Abstract

The effect of one two-step high-temperature post-weld heat treatment on the microstructure of TC4 weld joints has been studied in our experiment, and as a result, the weld joints with attractive mechanical property have been obtained. The weld joints consisted of lamellar martensitic α, retained β and primary α, therefore microstructure of the weld joints would be kept in balance, and spheroidised α phase both in the crystalline grain and grain boundary, which could improve attractive balance of mechanical properties.

Keywords:

• Two-step heat treatment
• Microstructure
• TC4 alloy weld joint
• Spheroidised α phase
• Lamellar α phase