Effect of Mo additions on microstructure and tensile behavior of a Co-Al-W-Ta-B alloy at room temperature
Effect of Mo additions on microstructure and tensile behavior of a Co-Al-W-Ta-B alloy at room temperature
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DOI：
10.1016/j.scriptamat.2012.06.013
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发表时间：
2012-09-01
影响因子：
6
通讯作者：
Sha, J. B.
中科院分区：
文献类型：
--
作者：
Feng, G.;Li, H.;Sha, J. B.
Mo掺杂Co-9Al-（9 - x）W-2 Ta-0. 02 B-xMo合金（x = 0，2，4，6，9 at.%）的相组成、显微组织和室温拉伸行为被调查。时效处理后，显微组织由γ基体和纳米级立方γ '相组成，Mo含量为0- 4at.%;然而，在γ ′/γ显微结构中另外发现针状胞状kappa-Co 3 Mo相，其中Mo含量为6- 9at.%。纯gamma '/gamma微观结构比gamma/gamma'/kappa微观结构具有更好的室温拉伸强度和延伸率。(C)2012 Acta Materialia Inc.由爱思唯尔有限公司出版。保留所有权利。
Phase constitutions, microstructures and room-temperature tensile behavior of Mo-doped Co-9Al-(9 - x)W-2Ta-0.02B-xMo alloys (where x = 0, 2, 4, 6, 9 at.%) are investigated. After aging treatment, the microstructure is composed of gamma matrix and nano-scale cuboidal gamma' precipitates, with Mo contents of 0-4 at.%; however, a needle-like cellular kappa-Co3Mo phase is additionally found in the gamma'/gamma microstructure, with Mo contents of 6-9 at.%. The pure gamma'/gamma microstructure exhibits better room-temperature tensile strength and elongation than the gamma/gamma'/kappa microstructure. (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.