Effect of tensile stress on microstructures and properties of creep aged 6N01 aluminum alloy

被引：1

作者：

Deng Y. ^{[1
,2
,3
]}

Shan B. ^{[1
]}

Zhang J. ^{[1
]}

Wang Y. ^{[2
]}

Zhang S. ^{[2
]}

机构：

[1] Light Alloy Research Institute, Central South University, Changsha

[2] School of Materials Science and Engineering, Central South University, Changsha

[3] State Key Laboratory of High Performance and Complex Manufacturing, Central South University, Changsha

来源：

Zhang, Jin (zhangjin19861003@126.com) | 2018年 / Central South University of Technology卷 / 49期

基金：

中国国家自然科学基金;

关键词：

6N01 aluminum alloy; Creep aging; Precipitates; Precipitation orientation effect;

D O I：

10.11817/j.issn.1672-7207.2018.06.007

中图分类号：

学科分类号：

摘要：

The changing regularity of microstructures and properties of 6N01 aluminum alloys after the uniaxial tensile-creep test were studied. After creep aging under different tensile stresses, the microstructures of samples were analyzed by optical microscope (OM), scanning electron microscope (SEM) and transmission electron microscope (TEM), while the mechanical properties were tested by Vickers hardness and tensile tests. The results show that the sample with 60 MPa loading creep stress has the highest tensile strength (341.6 MPa) after creep aging at 180 ℃ for 6 h, if the loading creep stress of CA treatment is below 60 MPa, the tensile strength would decreases slightly compared with that of 60 MPa loading creep stress. However, when the creep stress exceeds 60 MPa, tensile strength decreases sharply. This is because a greater creep stress would make precipitates coarsen in the aluminum matrix. What's more, stress-orienting effect of precipitation may appear, which makes anisotropic performance worse, and therefore, the mechanical properties of the material become worse. © 2018, Central South University Press. All right reserved.

引用

页码：1358 / 1365

页数：7

共 19 条

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