期刊
SCRIPTA MATERIALIA
卷 101, 期 -, 页码 44-47出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2015.01.014
关键词
Superalloy; Atom Probe Tomography; Precipitation; Topologically close-packed phases
类别
资金
- German Science Foundation (DFG) [1229]
- WSP of the Collaborative Research Center [SFB Transregio/103]
Two Ni-based superalloys (one Ru-free and one containing 1 at.% Ru) were comparatively studied by Atom Probe Tomography and complimentary techniques. Ru addition impedes precipitation of the a phase at 950 degrees C. Ru partitions nearly equally to the gamma and sigma phase. Neither reverse elemental partitioning nor destabilization of the gamma' phase is detected when adding Ru. We propose an increase in the gamma/sigma lattice misfit caused by Ru as a major reason for impeded nucleation of the a phase. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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