Effect of non-isothermal aging on microstructure and properties of Al-5.87Zn-2.07Mg-2.42Cu alloys

被引：15
|
作者：
Li, Yao [1 ,2 ]
Xu, Guo-fu [1 ,2 ]
Peng, Xiao-yan [1 ]
Liu, Shi-chao [1 ]
Deng, Ying [1 ]
Liang, Xiao-peng [1 ]
机构：
[1] Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China
[2] Cent South Univ, Key Lab Nonferrous Met Mat Sci & Engn, Minist Educ, Changsha 410083, Peoples R China
来源：
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2021年 / 31卷 / 10期
基金：
中国国家自然科学基金;
关键词：
Al-Zn-Mg-Cu aluminum alloy; non-isothermal aging; eta ' phases; mechanical properties; MG-CU ALLOY; MECHANICAL-PROPERTIES; CORROSION BEHAVIOR; PRECIPITATION; STRENGTH; GROWTH;
D O I：
10.1016/S1003-6326(21)65701-1
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The evolution of microstructure and properties of Al-5.87Zn-2.07Mg-2.42Cu alloys during non-isothermal aging was studied. The mechanical properties of the alloy were tested by stretching at room temperature. The results show that in the non-isothermal aging process, when the alloy is cooled to 140 degrees C, the ultimate tensile strength of the alloy reaches a maximum value of 582 MPa and the elongation is 11.9%. The microstructure was tested through a transmission electron microscope, and the experimental results show that the GP zones and eta' phases are the main strengthening precipitates. At the cooling stage, when the temperature dropped to 180 degrees C, the GP zones were precipitated again. Besides, the experimental results show that the main strengthening phase during non-isothermal aging is eta' phases.
引用
收藏
页码：2899 / 2908
页数：10
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