Effect of microstructure on hot tensile deformation behavior of 7075 alloy sheet fabricated by twin roll casting

被引：29
作者：
Wang, Lei [1 ,2 ]
Yu, Huashun [1 ]
Lee, Yun-Soo [2 ]
Kim, Min-Seok [2 ]
Kim, Hyoung-Wook [2 ]
机构：
[1] Shandong Univ, Sch Mat Sci & Engn, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ, Jinan 250061, Peoples R China
[2] Korea Inst Mat Sci, Metall Mat Div, Chang Won 642831, South Korea
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2016年 / 652卷
关键词：
7075 aluminum alloy; Twin roll casting; Hot tensile test; High strain rate; Elongation; Particles; ALUMINUM-ALLOY; RECRYSTALLIZATION BEHAVIOR; EVOLUTION;
D O I：
10.1016/j.msea.2015.11.079
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
7075 aluminum alloy sheet with a thickness of 1 mm was successfully fabricated by twin roll casting and subsequent rolling process. The hot tensile deformation behavior of 7075 alloy was evaluated and large elongation over 200% was obtained at 450 degrees C under the high strain rate of 1 x 10(-1) s(-1) In order to clarify the reason for the large elongation obtained at high strain rate, the effects of microstructure on hot tensile deformation behavior were investigated. The results show that high solidification rate during TRC casting process induced small particles (similar to 1 mu m) in homogeneous distribution. The relatively high fraction of particles over 1 mu m in size attributed the homogeneous recrystallized microstructure with fine grains induced by particle simulated nucleation (PSN). This fully recrystallized fine-grained microstructure of TRC alloy sheet contributed to high ductility and formability of 7075 alloy sheet under high strain rate. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：221 / 230
页数：10
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