Influence of high-pressure torsion on microstructural evolution in an Al-Zn-Mg-Cu alloy

被引：44

作者：

Duan, Zhi Chao ^{[1
,2
]}

Liao, Xiao Zhou ^{[3
]}

Kawasaki, Megumi ^{[1
,2
]}

Figueiredo, Roberto B. ^{[4
]}

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 Sydney, Sch Aerosp Mech & Mech Engn, Sydney, NSW 2006, Australia

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

来源：

JOURNAL OF MATERIALS SCIENCE | 2010年 / 45卷 / 17期

基金：

美国国家科学基金会;

关键词：

SEVERE PLASTIC-DEFORMATION; MECHANICAL-PROPERTIES; GRAIN-REFINEMENT; PURITY ALUMINUM; PURE ALUMINUM; STRAIN; HOMOGENEITY; METALS; ECAP;

D O I：

10.1007/s10853-010-4400-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A commercial age-hardenable Al-7136 alloy was successfully processed by high-pressure torsion (HPT) at room temperature through 1/8 to 4 turns. Microhardness measurements showed significant hardening even after 1/8 turn with the average hardness value reaching a maximum after 1 turn and then slowly decreasing. Higher hardness values were attained by processing the alloy through one pass of equal-channel angular pressing in a supersaturated condition at room temperature and then applying HPT for 1 or 2 turns. Microstructural observations revealed the possibility of achieving true nanometer grain sizes of < 100 nm after processing at room temperature. There were variations in hardness with imposed strain due to the fragmentation and subsequent growth of precipitates during processing.

引用

页码：4621 / 4630

页数：10

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