Repair welding of wrought superalloys: Alloy 718, Allvac 718Plus and Waspaloy
Artikel i vetenskaplig tidskrift, 2011

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

Författare

Joel Håkan Andersson

Chalmers, Material- och tillverkningsteknik, Yt- och mikrostrukturteknik

Göran Sjöberg

Chalmers, Material- och tillverkningsteknik, Yt- och mikrostrukturteknik

Science and Technology of Welding and Joining

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

Vol. 17 49-59

Ämneskategorier

Bearbetnings-, yt- och fogningsteknik

Annan materialteknik

Styrkeområden

Materialvetenskap

DOI

10.1179/1362171811Y.0000000077