Increasing the high-temperature mechanical properties of Mg-Gd-Y-Zn alloys by adding AlN/Al particles

被引:1
作者
Xie, Wenlong [1 ,2 ]
Gao, Yuyang [1 ,2 ]
Yang, Hong [1 ,2 ]
Guo, Xin [1 ,2 ]
Zhao, Jiwei [1 ,2 ]
Zhou, Jianxin [1 ,2 ]
Luo, Xiaojun [1 ,2 ]
Song, Jiangfeng [1 ,2 ]
Huang, Guangsheng [1 ,2 ]
Jiang, Bin [1 ,2 ]
Pan, Fusheng [1 ,2 ]
机构
[1] Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China
[2] Chongqing Univ, Natl Engn Res Ctr Magnesium Alloys, Chongqing 400044, Peoples R China
来源
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T | 2024年 / 33卷
基金
中国国家自然科学基金;
关键词
Mg matrix composites; AlN particles; High temperature; Mechanical properties; Microstructures; MAGNESIUM ALLOY; GRAIN-REFINEMENT; HIGH-STRENGTH; MICROSTRUCTURE; CREEP; CAST; PRECIPITATION; NANOPARTICLES; COMPOSITES; EVOLUTIONS;
D O I
10.1016/j.jmrt.2024.09.177
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The AlN particles reinforced Mg-10Gd-3Y-1Zn (GWZ) composites were prepared by mixing AlN/Al particles using ball milling followed by stirring casting method. The influence of AlN/Al particles on the microstructural evolution and high-temperature mechanical properties of GWZ alloys were revealed and discussed. With AlN/Al particles added into the as-cast alloys, the Mg3RE 3 RE phase was transformed into lamellar LPSO phase, while the content of Al2RE 2 RE and LPSO phase increased. Since the Al2RE 2 RE and AlN were effective nucleation sites for alpha-Mg, the grain size of AlN/Al-GWZ composites was reduced obviously from 126.1 to 39.8 mu m. After homogenization, due to the coherent lattice matching relationships between 18R-LPSO phase and Al2RE 2 RE or AlN particles, the 18RLPSO phase nucleated on the Al2RE 2 RE and AlN particles. After ageing treatment, the 2AlN/Al-GWZ composite showed the optimum mechanical properties at 250 degrees C, with the yield strength, ultimate tensile strength and elongation of 247.1 MPa, 265.5 MPa and 4.0%, respectively. The strengthening effect was primarily originated from the AlN particles, Al2RE 2 RE and LPSO phases in the 2AlN/Al-GWZ composite. Besides, the composites can achieve the enhancement of high-temperature strength without the sacrifice of plasticity due to the coordinated deformation of AlN particles as well as the refinement of grains.
引用
收藏
页码:2377 / 2390
页数:14
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