Segregation and clustering of solutes at grain boundaries in Mg-rare earth solid solutions
Segregation and clustering of solutes at grain boundaries in Mg-rare earth solid solutions
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DOI：
10.1016/j.actamat.2014.06.004
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发表时间：
2014-10-15
期刊：
影响因子：
9.4
通讯作者：
Botton, G. A.
中科院分区：
文献类型：
--
作者：
Bugnet, M.;Kula, A.;Botton, G. A.
本研究验证了以前报道的调查稀土（RE）元素在Mg-RE合金的晶界偏析，并最终提供了一个直接的可视化的溶质原子在Mg-Gd合金的结构中的分布。它表明，Gd形成固溶体内的Mg基体中，除了大量的偏析在高角度晶界的1-2 nm的簇的形式，与假定的面心立方Gd结构。结果表明，在合金加工和再结晶过程中的织构发展，从而对Mg-RE合金的力学行为和性能的重要意义。(C)2014 Acta Materialia Inc.由爱思唯尔有限公司出版。保留所有权利。
The present study validates the previously reported investigations about segregation of rare-earth (RE) elements at grain boundaries in Mg-RE alloys and ultimately provides a direct visualization of the distribution of the solute atoms in the structure of a Mg-Gd alloy. It is demonstrated that Gd forms a solid solution within the Mg matrix in addition to substantial segregation at high-angle grain boundaries in the form of 1-2 nm clusters, with a postulated face-centered cubic Gd structure. The results suggest significant implications for the texture development during alloy processing and recrystallization, and thus for the mechanical behavior and properties of Mg-RE alloys. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.