High strength and fracture toughness balance on the extruded Mg-Ca-Zn alloy
High strength and fracture toughness balance on the extruded Mg-Ca-Zn alloy
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DOI：
10.1016/j.msea.2007.01.021
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发表时间：
2007-06-25
期刊：
影响因子：
6.4
通讯作者：
Mukai, Toshiji
中科院分区：
文献类型：
--
作者：
Somekawa, Hidetoshi;Mukai, Toshiji
采用热挤压生产的Mg-0.3 at.% Ca-1.8 at.% Zn合金研究了其力学性能，该合金的平均晶粒尺寸约为1 μm，基体中析出物呈球形。通过拉伸区分析得出，挤压合金的屈服强度（sigma(ys) = 291 MPa）和平面应变断裂韧性（K-IC = 28.3 MPa·m(1/2)）表现出良好的平衡，高于传统变形镁合金。晶粒细化和基体中析出物弥散的微观结构控制是改善镁合金机械性能的可能方法。 (C) 2007 Elsevier B.V. 保留所有权利。
The mechanical properties were investigated by Mg-0.3 at.% Ca-1.8 at.% Zn alloy, which was produced by hot extrusion, having an average grain size of about 1 mu m and spherical precipitates in the matrix. The extruded alloy showed a good balance of the yield strength (sigma(ys) = 291 MPa) and plane-strain fracture toughness (K-IC = 28.3 MPa m(1/2)), obtained by the stretched zone analysis, which were higher than those of conventional wrought magnesium alloys. The microstructure control of both the grain refinement and the dispersion of precipitates in the matrix was a possible method for improvement of the mechanical properties in magnesium alloys. (C) 2007 Elsevier B.V. All rights reserved.