Microstructure, mechanical properties and deformation mechanisms of an Al-Mg alloy processed by the cyclical continuous expanded extrusion and drawing approach

被引：13

作者：

Lu, Ruiqing ^{[1
]}

Zhang, Long ^{[1
]}

Zheng, Shuwei ^{[1
]}

Fu, Dingfa ^{[1
,2
]}

Teng, Jie ^{[1
,2
]}

Chen, Jianchun ^{[2
,3
]}

Zhao, Guodong ^{[2
,3
]}

Jiang, Fulin ^{[1
,2
]}

Zhang, Hui ^{[1
,2
]}

机构：

[1] Hunan Univ, Coll Mat Sci & Engn, Changsha 410082, Peoples R China

[2] Hunan Prov Engn Res Ctr High Performance Super Lo, Yueyang 414005, Peoples R China

[3] Hunan Jinlianxing Special Mat Co Ltd, Yueyang 414005, Peoples R China

来源：

INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS | 2022年 / 29卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Al-Mg alloy; plastic processing; microstructure; mechanical properties; dynamic recrystallization; SEVERE PLASTIC-DEFORMATION; ULTRAFINE-GRAINED AL; DYNAMIC RECRYSTALLIZATION; ECAP-CONFORM; SC ALLOY; REFINEMENT; EVOLUTION; HOT; PRESSURE; KINETICS;

D O I：

10.1007/s12613-021-2342-y

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Al-Mg alloys are an important class of non-heat treatable alloys in which Mg solute and grain size play essential role in their mechanical properties and plastic deformation behaviors. In this work, a cyclical continuous expanded extrusion and drawing (CCEED) process was proposed and implemented on an Al-3Mg alloy to introduce large plastic deformation. The results showed that the continuous expanded extrusion mainly improved the ductility, while the cold drawing enhanced the strength of the alloy. With the increased processing CCEED passes, the multi-pass cross shear deformation mechanism progressively improved the homogeneity of the hardness distributions and refined grain size. Continuous dynamic recrystallization played an important role in the grain refinement of the processed Al-3Mg alloy rods. Besides, the microstructural evolution was basically influenced by the special thermomechanical deformation conditions during the CCEED process.

引用

页码：108 / 118

页数：11

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