Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10136919 | Results in Physics | 2018 | 6 Pages |
Abstract
In this study, the evolution of phase morphologies, compositions, structures of Mg-Y-Nd system with Sm addition were investigated. The microstructure of the as-cast alloy consists of a Mg-matrix, Mg24Y5 (bcc structure, aâ¯=â¯1.1250â¯nm), and Mg5(Y0.7Nd0.1Sm0.2) (fcc structure, aâ¯=â¯2.2472â¯nm) phases. After a solution treatment, the eutectic phases are substantially dissolved into the Mg-matrix. A large amount of βⲠprecipitates are dispersed and precipitated in the grain after a T6 heat treatment, and the orientation relationships between βⲠprecipitates and Mg-matrix are (0 0 1)βⲠ|| (0 0 0 1)Mg, (0 2 0)βⲠ|| (101¯0)Mg, [1 0 0]βⲠ|| [011¯0]Mg. Furthermore, the quadrate phases indexed as Mg6Y3(Nd0.8Sm0.2)1, Mg6Y3(Nd0.2Sm0.8)1, and Mg10Y5(Nd0.2Sm0.8)1 are observed in various heat treatment states, which are fcc structures and their lattice parameters are aâ¯=â¯0.5318â¯nm, aâ¯=â¯0.5319â¯nm, aâ¯=â¯0.9894â¯nm, respectively.
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Physical Sciences and Engineering
Physics and Astronomy
Physics and Astronomy (General)
Authors
Guilong Jia, Erjun Guo, Liping Wang, Yicheng Feng, Yanhong Chen,