Producing high strength aluminum alloy by combination of equal channel angular pressing and bake hardening

被引：15

作者：

Alihosseini, H. ^{[1
]}

Zaeem, M. Asle ^{[2
]}

Dehghani, K. ^{[1
]}

Faraji, G. ^{[3
]}

机构：

[1] Amirkabir Univ Technol, Dept Met Engn, Tehran, Iran

[2] Missouri Univ Sci & Technol, Dept Mat Sci & Engn, Rolla, MO 65401 USA

[3] Univ Tehran, Dept Mech Engn, Tehran, Iran

来源：

MATERIALS LETTERS | 2015年 / 140卷

基金：

美国国家科学基金会;

关键词：

High strength aluminum alloy; ECAP; Bake hardening; FORWARD-BACKWARD EXTRUSION; LOW-CARBON STEEL; PRECIPITATION; GRAIN; MICROSTRUCTURE;

D O I：

10.1016/j.matlet.2014.10.163

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A combination of severe plastic deformation by equal channel angular pressing (ECAP) and bake hardening (BH) was used to produce high strength ultrafine-grained AA6061 aluminum alloy. 2, 4 and 8 passes of ECAP were performed, and the bake hardenability of samples was tested by 6% pre-straining followed by baking at 200 degrees C for 20 min. The microstructures obtained for various passes of ECAP were characterized by XRD, EBSD, and TEM techniques. The microstructures were refined from an average grain size of 20 mu m to 212 nm after 8 passes of ECAP. Maximum bake hardenability of 110 MPa, and final yield stress of 330 MPa were obtained in the specimens processed by 8 passes of ECAP. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：196 / 199

页数：4

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