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
收藏
页码：4621 / 4630
页数：10
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