Evolution of Microstructure and Mechanical Properties of a New Al-Cu-Er Wrought Alloy

被引：38

作者：

Pozdnyakov, A., V ^{[1
]}

Barkov, R. Yu ^{[1
]}

Sarsenbaev, Zh ^{[1
]}

Amer, S. M. ^{[1
]}

Prosviryakov, A. S. ^{[1
]}

机构：

[1] Natl Univ Sci & Technol MISiS, Moscow 119049, Russia

来源：

PHYSICS OF METALS AND METALLOGRAPHY | 2019年 / 120卷 / 06期

基金：

俄罗斯科学基金会;

关键词：

aluminum alloys; rare-earth metals; erbium; microstructure; heat treatment; hardness; ZR; RECRYSTALLIZATION; PARTICLES;

D O I：

10.1134/S0031918X19060097

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The evolution of the microstructure and mechanical properties of deformed sheets made of a new Al-4Cu-2.7Er alloy has been studied in the course of homogenization and annealing. The structure of the cast alloy consists of a dispersed eutectic ((Al) + Al8Cu4Er), Al3Er-phase inclusions located along the dendritic-cell boundaries, and a nonequilibrium AlCu phase. During annealing at 605 degrees C before quenching, the intermetallic phases have high thermal stability: the particle size of Al8Cu4Er and Al3Er phases does not exceed 1-4 mu m. The annealing of deformed sheets at temperatures below 300 degrees C leads to a slight decrease in the hardness; grains elongated along the rolling direction are observed in the structure. With an increase inthe annealing temperature from 350 to 550 degrees C, the recrystallized grain size increases from 8 +/- 1 to 14.5 +/- 1.5m. The uniaxial tensile tests showed that the annealed alloy possesses sufficiently high strength characteristics: yield stress of 260-280 MPa, ultimate tensile strength of 291-312 MPa, and relative elongation of 5.5-6.1%.

引用

页码：614 / 619

页数：6

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