Dynamic recrystallization mechanisms of 2195 aluminum alloy during medium/high temperature compression deformation

被引：164

作者：

Zhang, Jingjing ^{[1
,2
,4
]}

Yi, Youping ^{[1
,2
,3
]}

Huang, Shiquan ^{[1
,2
,3
]}

Mao, Xianchang ^{[1
,2
]}

He, Hailin ^{[3
]}

Tang, Jiaguo ^{[1
,2
]}

Guo, Wanfu ^{[2
,3
]}

Dong, Fei ^{[2
,3
]}

机构：

[1] Cent South Univ, Coll Mech & Elect Engn, Changsha 410083, Peoples R China

[2] State Key Lab High Performance Complex Mfg, Changsha 410083, Peoples R China

[3] Cent South Univ, Res Inst Light Alloy, Changsha 410083, Peoples R China

[4] Hunan Ind Polytech, Coll Mech & Elect Engn, Changsha 410208, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2021年 / 804卷

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

2195 aluminum alloy; Dynamic recrystallization mechanism; Thermal compression; Medium temperature; High temperature;

D O I：

10.1016/j.msea.2020.140650

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The 2195 aluminum alloy has been widely utilized in the aerospace field, of which dynamic recrystallization microstructures have a substantial effect on the mechanical properties of aerospace parts. In this study, 2195 aluminum alloy was compressed at 300-520 degrees C using a Gleeble 3500-GTC thermo-mechanical testing system. The discontinuous dynamic recrystallization (DDRX) and continuous dynamic recrystallization (CDRX) behavior of 2195 aluminum alloy at medium/high temperature was studied. The results demonstrated that during medium temperatures (300-360 degrees C) deformation the main softening mechanism was DDRX, and at high temperatures (420-520 degrees C), it was CDRX. CDRX of 2195 aluminum alloy involved three types of subgrain-forming mechanisms: dislocation tangling to form subgrains, microscopic shear bands to form subgrains, and the coalescence of two small subgrains to form larger subgrains. In addition, several recrystallized grains underwent geometric dynamic recrystallization (GDRX) at high temperature and extensive deformation (480 degrees C-80% or 520 degrees C-60%).

引用

页数：14

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