Weldability of wrought Haynes® 282® repair welded using manual gas tungsten arc welding
Artikel i vetenskaplig tidskrift, 2018

The ability of the precipitation hardening superalloy Haynes® 282® to be repaired by multi-pass gas tungsten arc welding is investigated in this study. The repair welding has been carried out on forged discs having four pre weld heat treatments, resulting in different grain sizes and precipitate structures of the base material. Another set of discs has additionally been put through a post weld heat treatment. The tendency to form cracks in the heat-affected zone and the fusion zone has been investigated metallographically. No cracks in the base metal heat-affected zone were found, whereas solidification cracks were present in the weld fusion zone of all tested conditions. While high heat input during welding increased cracking by a factor of 1.5, none of the heat treatments had a measurable influence on the cracking behaviour. Voids with solid state crack-like appearance turned out to be aluminium-rich oxides being present from the deposition of previous weld deposit layers.

Weldability

Repair

GTA welding

Nickel alloys

Cracking

Författare

Fabian Hanning

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Joel Håkan Andersson

Högskolan Väst

Welding in the World, Le Soudage Dans Le Monde

0043-2288 (ISSN)

Vol. 62 1 39-45

Ämneskategorier

Bearbetnings-, yt- och fogningsteknik

Styrkeområden

Materialvetenskap

DOI

10.1007/s40194-017-0508-z

Mer information

Senast uppdaterat

2018-03-28