Study on Influence of Solution Temperature on Strengthening Mechanism of Thin-plated Fine-grained 2A97 Al-Li Alloy

被引：0
|
作者：
Niu F. [1 ]
Ma Z. [2 ]
Guo Y. [2 ]
Liu H. [1 ]
机构：
[1] Modern Engineering Training Center, Chang’an University, Xi’an
[2] College of Materials Science and Engineering, Chang’an University, Xi’an
来源：
Hunan Daxue Xuebao/Journal of Hunan University Natural Sciences | 2023年 / 50卷 / 06期
基金：
中国国家自然科学基金; 中央高校基本科研业务费专项资金资助;
关键词：
aluminum alloys; dislocations; metallography; precipitation; solution temperature;
D O I：
10.16339/j.cnki.hdxbzkb.2023302
中图分类号：
学科分类号：
摘要：
The solid solution temperature affects the strengthening mechanism of thin-plate fine-grain 2A97 alloy with a grain size of less than 10 μm. It has been observed that the tensile strength of peak-aging 2A97 alloy obtained at 540 ° C decreases by 40 MPa compared with 510 ℃ for the same solution time. X-ray diffraction，scanning electron microscopy，and transmission electron microscopy were applied to explain this phenomenon quantitatively from the perspective of strengthening mechanisms such as solid solution strengthening，grain boundary strengthening，dislocation strengthening and precipitation strengthening. It was found that the alloy solution-treated at 540 ℃ exhibited significantly grown grains，higher levels of recovery and recrystallization，lower dislocation density and wider grain boundary precipitate free zone than that at 510 ℃，resulting in a decrease in the properties. © 2023 Hunan University. All rights reserved.
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页码：144 / 155
页数：11
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