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Microstructural stability of the directionally solidified γ′-base superalloy IC6

1993; Elsevier BV; Volume: 160; Issue: 2 Linguagem: Inglês

10.1016/0921-5093(93)90456-o

1873-4936

Yafang Han, S.H. Li, M.C. Chaturvedi,

Aluminum Alloy Microstructure Properties

The microstructural stability of an NiAlMo directionally solidified γ′-base superalloy, IC6, was investigated and the effect on microstructure and tensile properties at room temperature and 760°C of high temperature aging at 900–1100°C for up to 200 h was studied. The experimental results show that the tensile strength decreases with aging time and that aging at 1000°C has the strongest effect on tensile properties. This is attributed to the precipitation of large amounts of the δ-NiMo phase. Microstructural changes during high temperature creep tests were also examined and are different from those observed during aging at the same temperature but without any applied stress.