The effects of temperature on the creep-aging behavior and mechanical properties of AA2050-T34 alloy

被引：25

作者：

Dong, Yu ^{[1
,2
]}

Ye, Lingying ^{[1
,2
]}

Tang, Jianguo ^{[1
,2
]}

Liu, Xiaodong ^{[1
,2
]}

Sun, Quan ^{[1
,2
]}

机构：

[1] Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China

[2] Cent South Univ, Key Lab Nonferrous Met Mat Sci & Engn, Minist Educ, Changsha 410083, Hunan, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2020年 / 796卷

关键词：

Creep-aging behavior; AA2050; alloy; Microstructure evolution; Aging temperature; Mechanical property; LI-CU ALLOYS; PRECIPITATION; MICROSTRUCTURE; PARAMETERS; EVOLUTION; STRESS; STRAIN; PHASE; SIZE;

D O I：

10.1016/j.msea.2020.140010

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Creep-aging behavior of AA2050-T34 alloy loaded with 175 MPa at different temperature for 24 h has been experimentally investigated. Corresponding mechanical properties for different creep-aging periods have been studied by tensile tests. The microstructures of some selected specimens have been characterized by transmission electron microscopy (TEM) and the precipitation evolution at different temperatures has been analyzed. The results show that the creep strain of AA2050-T34 alloy increases greatly with increasing creep-aging temperature, while it obtains the maximum tensile strength at 160 degrees C. A "double primary creep feature" with four stages has been observed at 160 degrees C. A "slow deceleration stage" is also found between primary and steady creep stages at 185 degrees C. The typical creep feature is observed at other temperatures. Such creep-aging behaviors are affected by the evolution of microstructures, including dislocation, precipitation and solid solution. And the effects of temperature on their evolution during creep-aging tests are analyzed.

引用

页数：11

共 43 条

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