Improving strength and ductility of Mg-Gd-Y-Zn-Zr alloy simultaneously via extrusion, hot rolling and ageing
Improving strength and ductility of Mg-Gd-Y-Zn-Zr alloy simultaneously via extrusion, hot rolling and ageing
复制标题
通过挤压、热轧和时效同时提高Mg-Gd-Y-Zn-Zr合金的强度和延展性
DOI：
10.1016/j.msea.2015.07.032
复制
发表时间：
2015-09-03
期刊：
影响因子：
6.4
通讯作者：
Kamado, Shigeharu
中科院分区：
文献类型：
--
作者：
Xu, Chao;Zheng, Mingyi;Kamado, Shigeharu
采用立式直冷铸造、挤压、热轧和峰值时效工艺制备了一种超高强度高塑性Mg-8.2Gd-3.8Y-1.02n-0.4Zr镁合金板材。峰值时效后的板材在室温下的拉伸屈服强度为416 MPa，极限拉伸强度为505 MPa，断裂伸长率为12.8%，具有优异的上级性能。强度的显着提高归因于晶粒内析出的细小β相、具有强基底织构的晶粒以及位于晶界的分散的长周期堆积有序（LPSO）相。(C)2015 Elsevier B. V.版权所有。
An ultra-high strength and high ductility Mg-8.2Gd-3.8Y-1.02n-0.4Zr Mg alloy sheet was fabricated by vertical direct chill casting, extrusion, hot rolling and peak-ageing treatment. The peak-aged sheet shows tensile yield strength of 416 MPa, ultimate tensile strength of 505 MPa and superior elongation to failure of 12.8% at ambient temperature. The remarkable improvement of strength is ascribed to the fine beta phase precipitated within the grains, grains with strong basal texture and the dispersed long period stacking ordered (LPSO) phases located at the grain boundaries. (C) 2015 Elsevier B.V. All rights reserved.