Hot deformation and processing map of a typical Al-Zn-Mg-Cu alloy

被引：248
作者：
Lin, Y. C. [1 ,2 ]
Li, Lei-Ting [1 ,2 ]
Xia, Yu-Chi [1 ,2 ]
Jiang, Yu-Qiang [1 ,2 ]
机构：
[1] Cent S Univ, Sch Mech & Elect Engn, Changsha 410083, Peoples R China
[2] State Key Lab High Performance Complex Mfg, Changsha 410083, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2013年 / 550卷
关键词：
Metals and alloys; Microstructure; Processing map; STATIC RECRYSTALLIZATION KINETICS; TEMPERATURE FLOW BEHAVIOR; DYNAMIC RECRYSTALLIZATION; MICROSTRUCTURAL EVOLUTION; WORKING BEHAVIOR; CONSTITUTIVE-EQUATIONS; STRAIN-RATE; STEEL; OPTIMIZATION; PARAMETERS;
D O I：
10.1016/j.jallcom.2012.10.114
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 high-temperature flow behavior of 7075 aluminum alloy was studied by hot compressive tests. Based on the experimental data, the efficiencies of power dissipation and instability parameter were evaluated. Processing maps were constructed by superimposing the instability map over the power dissipation map. Microstructural evolution of 7075 aluminum alloy during the hot compression was analyzed to correlate with the processing maps. It can be found that the flow stresses increase with the increase of strain rate or the decrease of deformation temperature. The high-angle boundaries and coarse precipitations distributing in the grain interior/boundaries, which may result in the deep inter-granular corrosion and large areas of denudation layer, should be avoided in the final products. The optimum hot working domain is the temperature range of 623-723 K and strain rate range of 0.001-0.05 s(-1). (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：438 / 445
页数：8
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