Enhanced elevated-temperature mechanical properties of hot-rolled Al-Cu alloys: effect of zirconium addition and homogenization

被引：9

作者：

Cui, Liying ^{[1
]}

Liu, Kun ^{[1
]}

Zhang, Zhan ^{[1
]}

Chen, X. -Grant ^{[1
]}

机构：

[1] Univ Quebec Chicoutimi, Dept Appl Sci, Saguenay, PQ G7H 2B1, Canada

来源：

JOURNAL OF MATERIALS SCIENCE | 2023年 / 58卷 / 27期

基金：

加拿大自然科学与工程研究理事会;

关键词：

ZR-TI ALLOYS; RECRYSTALLIZATION BEHAVIOR; PRECIPITATION EVOLUTION; CREEP RESISTANCE; MG; SC; MN; DEFORMATION; STRENGTH; DISPERSOIDS;

D O I：

10.1007/s10853-023-08728-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The microstructural evolution and mechanical properties of hot-rolled Al-Cu 2022 alloys were investigated to explore the effects of Zr addition and different homogenization procedures. Two-step low-temperature homogenization promoted a denser and finer distribution of Al3Zr particles in the Zr-containing alloy, which provided heterogeneous nucleation sites for & theta;& PRIME;& PRIME;/& theta;& PRIME; precipitates during the T7 treatment, increasing their number density. The Zr-containing T7-treated alloy exhibited a higher tensile strength than the base alloy. The Zr-containing alloy thermally exposed at 300 & DEG;C for 100 h still exhibited a higher tensile strength than the base alloy at both room and elevated temperatures. The Zr-containing alloy with two-step homogenization showed the highest yield strength of 157 and 114 MPa at 20 and 300 & DEG;C, respectively, which was 26 and 20% higher than that of the base alloy with conventional one-step homogenization. The strengthening mechanisms of the T7/T7A-treated alloys were quantitatively analyzed based on their microstructural characteristics. The predicted yield strengths agreed well with the experimentally measured values.

引用

页码：11424 / 11439

页数：16