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

Joel Andersson (Institutionen för material- och tillverkningsteknik) ; Göran Sjöberg (Institutionen för material- och tillverkningsteknik)
Science and Technology of Welding and Joining (1362-1718). Vol. 17 (2011), 1, p. 49-59.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: Heat affected zone cracking, Strain age cracking

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Denna post skapades 2011-11-28. Senast ändrad 2012-09-19.
CPL Pubid: 149106


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