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Fusion zone microstructure of laser beam welded directionally solidified Ni3Al-base alloy IC6

2005; Elsevier BV; Volume: 54; Issue: 5 Linguagem: Inglês

10.1016/j.scriptamat.2005.11.010

1872-8456

R.G. Ding, O.A. Ojo, M.C. Chaturvedi,

Fusion materials and technologies

The fusion zone microstructure of laser welded alloy IC6 was examined. Extensive weld-metal cracking was observed to be closely associated with non-equilibrium eutectic-type microconstituents identified as consisting of γ, γ′ and NiMo (Y) phases. Their formation has been related to modification of primary solidification path due to reduced solutal microsegregation.