Precipitation behaviors and properties of solution-aging Al-Zn-Mg-Cu alloy refined with TiN nanoparticles

被引：47
作者：
Li, Xinwei [1 ]
Cai, Qizhou [1 ]
Zhao, Bingyi [1 ]
Liu, Bo [1 ]
Li, Wenwu [2 ]
机构：
[1] Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Hubei, Peoples R China
[2] Guangdong Univ Technol, Sch Mat & Energy, Guangdong Prov Key Lab Funct Soft Mat, Guangzhou 510006, Guangdong, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2018年 / 746卷
基金：
中国国家自然科学基金;
关键词：
TiN nanoparticles; Al-Zn-Mg-Cu alloy; Solution-aging treatment; Microstructures; Mechanical properties; Electrical conductivities; MECHANICAL-PROPERTIES; ALUMINUM-ALLOYS; MINOR SC; ZR ALLOY; MICROSTRUCTURE; STRENGTH; EVOLUTION; COMPOSITES;
D O I：
10.1016/j.jallcom.2018.02.271
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The precipitation hardening characteristics, aging precipitation behaviors, mechanical properties and electrical conductivity of the Al-Zn-Mg-Cu alloy refined with TiN nanoparticles (well supported by Ti microparticles) are investigated, in detail. The results show that, compared with the alloy with only Ti or without any refiner, the TiN nanoparticle addition improves the solution of the alloying elements, retains the fine grains of the Al-Zn-Mg-Cu alloy during the solid solution process and enhances the Vickers hardness of the solution treated alloy. More importantly, during the aging process, the TiN nanoparticle addition promotes the diffusely uniform precipitation of the G.P. zones, eta' phase and eta phase, and accelerates the evolution to the G.P. zones from the supersaturated solid solution in the matrix, but inhibits the precipitations of eta' phase and eta phase. The yield stress (569.8 MPa), ultimate tensile stress (595.5 MPa) and elongation (18.1%) of the alloy refined with TiN are higher than those with only Ti or without any refiner. In addition, the electrical conductivities of the aged alloy with TiN are lower than those of the alloy with only Ti or without any refiner. (c) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码：462 / 470
页数：9
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