Abstract

The void swelling susceptibility of austenitic stainless steel weldments has been examined. Materials used were Type 316 stainless steel containing 0.08% Ti and JPCA. Plates of these steels were electron-beam welded in a vacuum, and disks for irradiation experiments were obtained from the transverse sections, corresponding to the base metal, heat affected zone and weld metal. Irradiation in a High Voltage Electron Microscope (HVEM) was carried out at 773 K up to 15 dpa. In both steels this produced more void swelling in the weld metal than in the base metal, and more void swelling in the heat affected zone than in the base metal for Type 316 stainless steel. Segregation during solidification was detected in the weld metal and this may affect the void swelling susceptibility through the compositional change along with precipitation.

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