Haynes^® 282^® alloy is an unusual wrought gamma prime, γ'- Ni₃(Al, Ti), strengthened superalloy with improved thermal stability, weldability, and fabricability compared to Waspaloy and R-41. In particular, 282^® alloy was designed to have improved resistance to strain age cracking, a well known intergranular cracking phenomena that occurs when components containing residual stresses are heated through the range of temperatures (typically 1100 - 1800 F) in which precipitation reactions proceed. The 282^® alloy has been gas metal and gas tungsten arc welded using a commercially available matching composition filler wire.

Recently, 282^® alloy has been viewed as an attractive candidate for weld repair of gas turbine hardware. Historically, solid solution strengthened (e.g. 625 alloy, etc.) and gamma prime strengthened (e.g. Waspaloy alloy, etc.) alloys have been used for weld repair of low and high stress areas of gas turbine components respectively. One of the major issues with using a gamma prime strengthened filler wire for gas turbine weld repair is the potential incompatibility of the filler wire and base metal heat treatments. If the base metal aging treatment is vastly different from the filler wire, the strength of the weld will be affected by either underaging or overaging of the fusion zone.

The effect of parent material heat treatments (CM939, R-41 alloy, Waspaloy alloy, X-750 alloy) on weld metal (230-W, 263 alloy, 282^® alloy, 625 alloy) was investigated by extracting all weld metal (developed using the gas tungsten arc welding process) tensile specimens from Cruciform assemblies and performing high temperature mechanical property tests at a temperature within the strain age cracking sensitivity range. Test results will be presented showing the effect of parent material aging treatments on weld metal mechanical properties. Microstructural characterization of the aged solidification substructure will also be presented and correlated with any observed property degradation.