Solute partitioning in multi-component γ/γ′ Co-Ni-base superalloys with near-zero lattice misfit

SCRIPTA MATERIALIA

卷:113

Article

Meher, S.¹  Carroll, L. J.¹  Pollock, T. M.²  Carroll, M. C.¹ 

[1] Idaho Natl Lab, Mat Sci & Engn Dept, Idaho Falls, ID 83415 USA

[2] Univ Calif Santa Barbara, Dept Mat, Santa Barbara, CA 93106 USA

关键词: Co-base superalloys;    APT;    TEM;    Partitioning;    Lattice misfit;   

DOI  :  10.1016/j.scriptamat.2015.10.039

来源: Elsevier

【 摘 要 】

The addition of nickel to cobalt-base alloys enables alloys with a near zero gamma-gamma ' lattice misfit. The solute partitioning between ordered gamma ' precipitates and the disordered gamma matrix have been investigated using atom probe tomography. The unique shift in solute partitioning in these alloys, as compared to that in simpler Co-base alloys, derives from changes in site substitution of solutes as the relative amounts of Co and Ni change, highlighting new opportunities for the development of advanced tailored alloys. (C) 2015 Elsevier Ltd. All rights reserved.

【 授权许可】

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