Effect of Zr on microstructure and mechanical properties of the Al-Cu-Er alloy

被引：42
作者：
Amer, S. M. [1 ,2 ]
Barkov, R. Yu [1 ]
Yakovtseva, O. A. [1 ]
Loginova, I. S. [1 ]
Pozdniakov, A., V [1 ]
机构：
[1] Natl Univ Sci & Technol MISIS, Leninskiy Pr 4, Moscow 119049, Russia
[2] Al Azhar Univ, Fac Engn, Met & Petr Engn Dept, Min, Cairo, Egypt
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 2020年 / 36卷 / 04期
基金：
俄罗斯科学基金会;
关键词：
Metals and alloys; microstructure; phase composition; L1(2) precipitates; Erbium; recrystallisation; hardness; mechanical properties; PRECIPITATION; HOMOGENIZATION; EVOLUTION;
D O I：
10.1080/02670836.2019.1709689
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The microstructure and mechanical properties of the Al-4Cu-2.7Er-0.3Zr alloy were investigated. The precipitates of the L1(2) structured phase with sizes 37 +/- 12 nm were formed in lines and homogenously distributed inside the aluminium matrix after annealing at 605 degrees C for 1 h. The as-rolled Al-4Cu-2.7Er-0.3Zr alloy developed an increased hardness after 1 h annealing at 100-550 degrees C and 0.5-6 h annealing at 150-250 degrees C due to precipitation of the Al-3(Er,Zr) phase. Addition of Zirconium improved the tensile properties relative to those of the Zr-free alloy by approximately 20 MPa: yield strength = 273-296 MPa and ultimate tensile strength = 296-328 MPa in the alloys annealed at 100-150 degrees C.
引用
收藏
页码：453 / 459
页数：7
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