Repair welding of wrought superalloys: Alloy 718, Allvac 718Plus and Waspaloy
Journal article, 2012

The ability to weld repair three precipitation hardening superalloys, Alloy 718, Allvac 718Plus and Waspaloy, with GasTungsten Arc Welding is compared in this study. Four different solution heat treatment conditions for each material were examined; Alloy 718 and Allvac 718Plus heat treated at 954 °C-1 h, 982 °C-1 h, 954 °C-15 h and 1020 °C-1 h and Waspaloy for 4 h at 996 °C, 1010 °C, 1040 °C and at 1080 . By metallography, the total number of cracks was evaluated both in the HAZ and in the FZ which made it possible to consistently rate the repair weldability of these three materials. Alloy 718 was significantly the best one with Allvac 718Plus slightly better than Waspaloy. As expected, the solution heat treatment conditions only affected the HAZ cracking behavior.

Heat affected zone cracking

Strain age cracking

Author

Joel Håkan Andersson

Chalmers, Materials and Manufacturing Technology, Surface and Microstructure Engineering

Göran Sjöberg

Chalmers, Materials and Manufacturing Technology, Surface and Microstructure Engineering

Science and Technology of Welding and Joining

1362-1718 (ISSN) 1743-2936 (eISSN)

Vol. 17 1 49-59

Subject Categories

Manufacturing, Surface and Joining Technology

Other Materials Engineering

Areas of Advance

Materials Science

DOI

10.1179/1362171811Y.0000000077

More information

Latest update

2/18/2021