Microstructure and mechanical property of bimodal-size metallic glass particle-reinforced Al alloy matrix composites

被引：30
|
作者：
Xie, M. S. [1 ,2 ]
Wang, Z. [1 ,2 ]
Zhang, G. Q. [1 ,2 ]
Yang, C. [1 ,2 ]
Zhang, W. W. [1 ,2 ]
Prashanth, K. G. [3 ,4 ,5 ]
机构：
[1] South China Univ Technol, Sch Mech & Automot Engn, Guangdong Key Lab Proc & Forming Adv Metall Mat, Guangzhou 510640, Guangdong, Peoples R China
[2] South China Univ Technol, Natl Engn Res Ctr Near Net Shape Forming Metall M, Guangzhou 510640, Guangdong, Peoples R China
[3] Tallinn Univ Technol, Dept Mech & Ind Engn, Ehitajate Tee 5, EE-19086 Tallinn, Estonia
[4] Austrian Acad Sci, Erich Schmid Inst Mat Sci, Jahnstr 12, A-8700 Leoben, Austria
[5] Vellore Inst Technol, Sch Engn, CBCMT, Vellore 632014, Tamil Nadu, India
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2020年 / 814卷
基金：
中国国家自然科学基金;
关键词：
Aluminum matrix composites; Bimodal sized particles; Metallic glasses; Mechanical properties; Strengthening mechanisms; QUASI-CRYSTALLINE PARTICLES; TENSILE PROPERTIES; SIC PARTICLES; 2024; ALUMINUM; FABRICATION; STRENGTH; BEHAVIOR; WETTABILITY; EVOLUTION; PRESSURE;
D O I：
10.1016/j.jallcom.2019.152317
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：
A bimodal size metallic glassy particles reinforced 7075 aluminum composite was fabricated by powder metallurgy via ball milling and hot extrusion. The results show that metallic glassy reinforcements help to improve the densification due to the liquid-like behavior in the supercooled liquid region. The metallic glassy reinforcements were found to have a bimodal size distribution at nanoscale and microscale, and were uniformly distributed in the matrix. An interphase layer with a thickness of 60-80 nm was observed between the reinforcement/matrix resulted from elemental diffusion and chemical reaction. The introduction of bimodal size metallic glassy particles have significantly improved the mechanical properties, where the yield strength and fracture strength increase from 442 and 648 MPa for Al7075 to 869 and 962 MPa for composite with 17 vol% reinforcement, respectively. The strengthening mechanisms of the composites were revealed. (C) 2019 Elsevier B.V. All rights reserved.
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页数：6
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