Characterization of porosity and its effect on the tensile properties of Mg-6Gd-3Y-0.5Zr alloy

被引：15

作者：

Zhou, B. ^{[1
,2
]}

Meng, D. H. ^{[3
,4
]}

Wu, D. ^{[1
]}

Tang, J. F. ^{[5
]}

Chen, R. S. ^{[1
]}

Li, P. J. ^{[3
]}

Han, En-Hou ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, Grp Magnesium Alloys & Their Applicat, 62 Wencui Rd, Shenyang 110016, Liaoning, Peoples R China

[2] Univ Sci & Technol China, Sch Mat Sci & Engn, 19 Jinzhai Rd, Hefei 230026, Anhui, Peoples R China

[3] Tsinghua Univ, Dept Mech Engn, Beijing 100084, Peoples R China

[4] Beijing Inst Astronaut Syst Engn, Beijing 100076, Peoples R China

[5] Nanjing Univ Aeronaut & Astronaut, State Key Lab Mech & Control Mech Struct, Nanjing 210016, Jiangsu, Peoples R China

来源：

MATERIALS CHARACTERIZATION | 2019年 / 152卷

基金：

中国国家自然科学基金;

关键词：

Mg-Gd-Y-Zr; Porosity; Tensile properties; QUANTITATIVE FRACTOGRAPHIC ANALYSIS; DIE-CAST AM50; MECHANICAL-PROPERTIES; WT.PERCENT ALLOY; STRAIN-RATE; VARIABILITY; MICROSTRUCTURES; MICROPOROSITY; DUCTILITY; BEHAVIOR;

D O I：

10.1016/j.matchar.2019.04.021

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Microstructure investigations and static uniaxial tensile tests of Mg-6Gd-3Y-0.5Zr (GW63) alloys containing varied content of porosity were carried out to disclose the relationship between porosity and tensile properties. Here, a qualitative analysis was performed by relating the tensile properties with porosity level, which was relevant to porosity content and assessed by X-ray detector. Besides, both analytical (i.e., critical local strain model) and empirical methods were applied to quantitatively investigate the influence of porosity on tensile properties, based on the projected area of porosity on the fracture surface. The results showed that two types of porosity and three typical regions on the fracture surface were identified. Both ultimate tensile strength (UTS) and elongation-to-failure (EL) decreased with porosity level increasing. Besides, a great scatter of EL of each porosity level was observed. The critical local strain model was testified not applicable for GW63 alloys to calculate the tensile properties. Instead, strong quantitative correlations between tensile properties and porosity area fraction were obtained through the empirical approach.

引用

页码：204 / 212

页数：9

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