Friction stir welding of Haynes 282 Ni superalloy by using a novel hemispherical tool.

ABSTRACT: In the present investigation, friction stir welding (FSW) of a gamma prime (γ') strengthened Haynes 282 nickel-base superalloy by using a novel hemispherical tool is documented. A joint efficiency of ~ 96% was achieved in the as-welded condition, which further increased to ~ 100% after two-step post-weld aging heat treatment. An extremely fine (~ 2 μm) grained microstructure was observed in the FSWed region compared with the coarse (~ 48 μm) grain base metal region. The carbides (MC and M₂₃C₆) and γ' precipitates are identified as the important microstructural constituent phases observed in the welded region. The aging heat treatment resulted in the precipitation of the γ' strengthening phase and altered the morphology of the M₂₃C₆ carbide phase

SUBMITTER: Sharma A 

PROVIDER: S-EPMC11560929 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature