Influence of Initial Microstructure on the Strengthening Effect of Extruded Mg-8Sn-4Zn-2Al Alloys

被引：19
|
作者：
Bai, Yang [1 ]
Cheng, Wei-Li [1 ,2 ,3 ]
Ma, Shi-Chao [1 ]
Zhang, Jun [1 ]
Guo, Chen [1 ]
Zhang, Yao [1 ]
机构：
[1] Taiyuan Univ Technol, Sch Mat Sci & Engn, Taiyuan 030024, Shanxi, Peoples R China
[2] Taiyuan Univ Technol, Shanxi Key Lab Adv Magnesium Based Mat, Taiyuan 030024, Shanxi, Peoples R China
[3] Taiyuan Univ Technol, Minist Educ, Key Lab Interface Sci & Engn Adv Mat, Taiyuan 030024, Shanxi, Peoples R China
来源：
ACTA METALLURGICA SINICA-ENGLISH LETTERS | 2018年 / 31卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Mg-Sn alloy; Extrusion; Microstructure; Tensile property; Strengthening mechanism; MG-SN ALLOYS; MECHANICAL-PROPERTIES; MAGNESIUM ALLOY; TENSILE PROPERTIES; EXTRUSION; BEHAVIOR; ZN; TEMPERATURE; EVOLUTION; PHASE;
D O I：
10.1007/s40195-017-0673-5
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The Mg-8Sn-4Zn-2Al (TZA842, in wt%) alloys with different initial microstructure (as-cast-AC and homogenization treatment-HT) subjected to hot extrusion. Also, the strengthening responses to AC and HT for the extruded TZA842 alloys were reported. The results revealed that the alloy subjected to HT shows finer grain size, more homogenous microstructure and weaker basal texture than those of counterpart subjected to AC. In addition, compared with TZA842-AC alloy, precipitates were finer and uniformly dispersed in TZA842-HT owing to the utilization of HT. Moreover, the TZA842-HT alloy showed higher yield strength of 200 MPa, ultimate tensile strength of 290 MPa and elongation (EL) of 17.9% than those of TZA842-AC, which was mainly attributed to the combined effects of grain boundary strengthening, precipitation strengthening, solid solution strengthening and weak texture. Strengthening mechanism for both alloys was discussed in detail.
引用
收藏
页码：487 / 495
页数：9
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