Microstructures, mechanical properties, and aging behavior of hybrid-sized TiB2 particulate-reinforced 2219 aluminum matrix composites

被引：38
作者：
Li, Linwei [1 ,2 ]
Han, Zhenhao [1 ,2 ]
Gao, Minqiang [3 ]
Li, Shaowei [4 ]
Wang, Huihui [5 ]
Kang, Huijun [1 ,2 ]
Guo, Enyu [1 ,2 ]
Chen, Zongning [1 ,2 ]
Wang, Tongmin [1 ,2 ]
机构：
[1] Dalian Univ Technol, Sch Mat Sci & Engn, Key Lab Solidificat Control & Digital Preparat Te, Dalian 116024, Peoples R China
[2] Dalian Univ Technol, Ningbo Inst, Ningbo 315000, Peoples R China
[3] Dalian Jiaotong Univ, Engn Res Ctr Continuous Extrus, Minist Educ, Dalian 116028, Peoples R China
[4] Dalian Huicheng Aluminium Co Ltd, Dalian 116105, Peoples R China
[5] Dalian Neusoft Univ Informat, Dalian 116023, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2022年 / 829卷
基金：
中国国家自然科学基金;
关键词：
2219 aluminum matrix composite; Aging behavior; Microstructure; Mechanical property; TiB2; particle; IN-SITU COMPOSITES; PRECIPITATION KINETICS; DISLOCATION DENSITY; ALLOY; AL; TENSILE; DIFFRACTION; TEMPERATURE; PARTICLES; STRENGTH;
D O I：
10.1016/j.msea.2021.142180
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Particulate-reinforced aluminum matrix composites are widely used owing to their advantageous comprehensive performance. For these composites, aging treatment is an important and essential process. However, researchers have discrepant opinions regarding the exact effects of particles on the aging behavior. In this study, the aging behavior of TiB2/2219Al composites is analyzed in terms of thermodynamics and kinetics. The results reveal that the particles can both promote aging and impede aging, and the peak aging times of the composites are advanced in this study. The effects of hybrid-sized TiB2 particles on the microstructures and mechanical properties of aged TiB2/2219Al composites are investigated. The results show noticeable dislocation propagation after the addition of TiB2, and this is confirmed by transmission electron microscopy observations and modified Williamson-Hall equation calculations. The Vickers hardness values are increased under all aging conditions. The strengths of the naturally aged composite, yield strength of the under-aged composite, and Young's modulus are increased significantly, whereas the strengths of composites under other aging conditions record only slight improvement. The total elongations of all the composites are decreased owing to the presence of TiB2 agglomerates.
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页数：11
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