Phase Equilibria in Co-Rich Co-Al-W Alloys at 1300°C and 900°C

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The phase equilibria of Co-base trial alloys of Co-9Al-7.5W, Co-5.5Al-10W and Co-9Al-3W at 1300°C and 900°C were determined in the present investigation. The experimental alloys were γ single-phase alloys at 1300°C, although the existence of the γ' phase and the ε phase was identified due to cooling effect. The nearly cuboidal γ' phase and the plate-like DO19 phase in alloys 9Al-7.5W and 5.5Al-10W were coarsened after long-term annealing at 900°C. It is suggested that the alloy 9Al-7.5W was in γ+γ' two-phase region, while the alloys 5.5Al-10W and 9Al-3W were in γ+DO19 two-phase region and γ singe-phase region at 900°C, respectively.

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Periodical:

Edited by:

Yafang Han, Fusheng Pan, Jianmao Tang, Chungen Zhou

Pages:

388-391

DOI:

10.4028/www.scientific.net/MSF.686.388

Citation:

F. Xue et al., "Phase Equilibria in Co-Rich Co-Al-W Alloys at 1300°C and 900°C", Materials Science Forum, Vol. 686, pp. 388-391, 2011

Online since:

June 2011

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$35.00

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