The intrinsic effect of long period stacking ordered phases on mechanical properties in Mg-RE based alloys
The intrinsic effect of long period stacking ordered phases on mechanical properties in Mg-RE based alloys
复制标题
长周期堆叠有序相对镁稀土基合金力学性能的内在影响
DOI：
10.1016/j.jallcom.2015.11.098
复制
发表时间：
2016-03-05
影响因子：
6.2
通讯作者：
Zhang, M. -X.
中科院分区：
文献类型：
--
作者：
Li, Y. X.;Zhu, G. -z.;Zhang, M. -X.
含长周期堆积有序相(LPSO)的镁稀土合金通常具有优良的力学性能，但LPSO相对力学性能的影响仍存在争议。为了阐明LPSO相在镁稀土合金中的本征效应，我们通过微观结构调控的方法研究了两种选定的镁稀土合金。实验结果表明，LPSO相不仅可以抑制具有c轴基中心正交(CBCO)结构的主要强化β‘相的粗化，而且可以调节塑性变形过程中的基面位错。因此，通过将LPSO相和β‘相协同结合的智能合金设计具有巨大的潜力，可以在镁稀土基合金中实现高强度、高塑性和高蠕变性能的优化。(C)2015爱思唯尔B.V.保留所有权利。
Mg-RE alloys containing long period stacking ordered (LPSO) phases usually exhibit excellent mechanical properties while the effect of LPSO phases on mechanical properties is still in dispute. To clarify the intrinsic effect of LPSO phases in Mg-RE alloys, we investigated two selected Mg-RE alloys through microstructure manipulation. The experimental results indicate that the LPSO phases can not only inhibit the coarsening of predominant strengthening beta' phase with a c-axis base-centred orthogonal (cbco) structure, but also accommodate basal dislocations during plastic deformation. Therefore, smart alloy design by incorporating the LPSO and beta' phases synergistically has great potential to achieve optimized mechanical properties with high strength, high ductility and high creep resistance in Mg-RE based alloys. (C) 2015 Elsevier B.V. All rights reserved.