Microstructural evolution in an Al-6061 alloy processed by high-pressure torsion

被引：124

作者：

Loucif, Aicha ^{[3
]}

Figueiredo, Roberto B. ^{[4
]}

Baudin, Thierry ^{[5
]}

Brisset, Francois ^{[5
]}

Langdon, Terence G. ^{[1
,2
,4
]}

机构：

[1] Univ So Calif, Dept Aerosp & Mech Engn, Los Angeles, CA 90089 USA

[2] Univ So Calif, Dept Mat Sci, Los Angeles, CA 90089 USA

[3] Univ Annaba, Fac Sci, Dept Phys, LM2S, Annaba 23000, Algeria

[4] Univ Southampton, Sch Engn Sci, Mat Res Grp, Southampton SO17 1BJ, Hants, England

[5] Univ Paris 11, ICMMO, UMR CNRS 8182, F-91405 Orsay, France

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2010年 / 527卷 / 18-19期

基金：

美国国家科学基金会;

关键词：

Aluminum alloy; Grain boundary misorientations; Hardness; High-pressure torsion; Ultrafine grains; SEVERE PLASTIC-DEFORMATION; CHANNEL-ANGULAR-EXTRUSION; MECHANICAL-PROPERTIES; ALUMINUM-ALLOY; GRAIN-REFINEMENT; PURE ALUMINUM; SCALING-UP; HOMOGENEITY; ECAP; STRAIN;

D O I：

10.1016/j.msea.2010.04.027

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Experiments were conducted to evaluate the evolution of hardness and microstructure in a commercial aluminum 6061 alloy processed by high-pressure torsion (HPT). The results show that processing by HPT leads to significant grain refinement with an average grain size of 450 nm at the edge of a disk subjected to torsional straining through 5 turns. Hardness measurements show an increase from 80 Hv in the solid solution condition to 160 Hv after HPT where these values correlate well with the equivalent strain applied to the disk. Quantitative measurements show the grain size decreases and the fraction of high-angle grain boundaries increases with increasing strain. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：4864 / 4869

页数：6

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