The mechanism of x-assisted a phase formation in near b-Ti alloys
The mechanism of x-assisted a phase formation in near b-Ti alloys
复制标题
x 辅助近 b-Ti 合金中 a 相形成的机理
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
J. Cairney
中科院分区：
文献类型：
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作者：
Tong Li;D. Kent;G. Sha;M. Dargusch;J. Cairney
用原子探针层析和高分辨电子显微镜测量了573K等温时效后近b合金x-to-a相变过程中合金元素的分配。首次观察到与x析出物相关的富氧区，这些富氧区可能是a相的形核点。与其他元素不同，Al和O的配分行为对于a和x是不同的，这表明x-a相变是一种混合模机制。2015 Acta Materialia Inc.由爱思唯尔有限公司出版。版权所有。
Partitioning of alloying elements during the x-to-a phase transformation in a near-b alloy after isothermal ageing at 573 K was measured using atom probe tomography and high-resolution transmission electron microscopy. O-rich regions associated with x precipitates were observed for the first time, and likely serve as nucleation sites for the a phase. The partitioning behaviours of Al and O, unlike other elements, are different for a and x, suggesting a mixed-mode mechanism for the x-to-a phase transformation. 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.