Effects of rare earth elements on microstructure and mechanical properties of 2219 aluminum alloy

被引：0

作者：

Zhao, Yang ^{[1
]}

Liu, Chongyu ^{[1
]}

Jia, Guilong ^{[2
]}

He, Kezhun ^{[2
]}

机构：

[1] School of Materials Science and Engineering, Guilin University of Technology, Guilin,541004, China

[2] Guangxi Key Laboratory of Materials and Processes of Aliminum Alloys, ALG Aluminium lnc., Nanning,530031, China

来源：

Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2025年 / 35卷 / 02期

关键词：

Aluminum alloys - Brinell Hardness - Bulk Density - Cerium alloys - Cesium alloys - Lanthanum alloys - Microalloying - Microhardness - Rockwell hardness - Weldability;

D O I：

10.11817/j.ysxb.1004.0609.2024-45196

中图分类号：

学科分类号：

摘要：

In this study, 0.15% (mass fraction) Zr, Sc, La and Ce were added into 2219 aluminum alloy by melting, and the Al-Cu casting ingots containing various rare earth elements were fabricated. The alloys underwent homogenization treatment, hot rolling, solid solution and aging treatment. The effects of rare earth element microalloying on the microstructure and mechanical properties of 2219 alloy were investigated. The results indicate that the additions of Zr and Sc elements can increase the density of Al3M (Al3Zr, Al3Sc, Al3(Sc,Zr)) phases in the 2219 alloy, while the additions of La and Ce result in the formation of Al11La3 and Al8Cu4Ce phases, respectively. The above-mentioned second phases can inhibit recrystallization, thereby refine the grains of alloys. The Al3M phases can also promote the formation and transformation of θ″phase, and then enhance the density of θ″phases in the alloys after artificial aging. The Sc-containing alloy with artificial aging state exhibites higher strength than other alloys with the same state. Meanwhile, for the alloys with natural aging state, the La-containing alloy has the best comprehensive mechanical properties. © 2025 Central South University. All rights reserved.

引用

页码：503 / 514