Hot deformation behavior and microstructure evolution of annealed Al-7.9Zn-2.7Mg-2.0Cu (wt%) alloy

被引：78
作者：
Zang, Qianhao [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, Minist Educ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Jinan 250061, Shandong, Peoples R China
[2] Korea Inst Mat Sci, Metall Mat Div, Chang Won 51508, South Korea
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2018年 / 763卷
关键词：
Aluminum; Processing map; Texture; Dynamic recrystallization; Particle stimulated nucleation (PSN); SEVERE PLASTIC-DEFORMATION; 7050; ALUMINUM-ALLOY; 3D PROCESSING MAP; MG-CU ALLOY; ER-ZR ALLOY; MECHANICAL-PROPERTIES; RECRYSTALLIZATION BEHAVIOR; DYNAMIC RECRYSTALLIZATION; AUTOMOTIVE APPLICATIONS; ELEVATED-TEMPERATURE;
D O I：
10.1016/j.jallcom.2018.05.307
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：
Hot compression test of annealed Al-7.9Zn-2.7Mg-2.0Cu alloy was carried out on a thermo-mechanical simulator (Thermacmaster-Z). The hot deformation behavior of the alloy was studied, and the processing map at the strain of 0.7 was established. The processing map exhibited three stable domains with high efficiency (> 30%), which suggested that good hot workability was obtained for the studied alloy. The continuous dynamic recrystallization (CDRX) and discontinuous DRX (DDRX) by PSN were considered the recrystallization mechanisms at low deformation temperature. The particles promoted the recrystallization by stimulating nucleation at the low deformation temperature. The necklace grains were developed along the original grain boundaries through progressive rotation of subgrains in the studied alloy. The effect of PSN was weaker with increasing the deformation temperature, and CDRX was the dominant recrystallization mechanism at high deformation temperature. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码：25 / 33
页数：9
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