Processing map and microstructure evaluation of AA6061/Al2O3 nanocomposite at different temperatures

被引：21
|
作者：
Ezatpour, H. R. [1 ]
Sajjadi, S. A. [2 ]
Sabzevar, M. Haddad [2 ]
Chaichi, A. [3 ]
Ebrahimi, G. R. [4 ]
机构：
[1] Sabzevar Univ New Technol, Fac Engn, Sabzevar 9615131113, Iran
[2] Ferdowsi Univ Mashhad, Engn Fac, Dept Mat Sci & Met Engn, Mashhad, Iran
[3] Louisiana State Univ, Dept Mech & Ind Engn, Baton Rouge, LA 70803 USA
[4] Hakim Sabzevari Univ, Dept Mat & Polymer Engn, Sabzevar, Iran
来源：
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2017年 / 27卷 / 06期
关键词：
nanocomposite; hot compression test; processing map; dynamic recrystallization; instability flow; HOT DEFORMATION-BEHAVIOR; 6061; ALUMINUM-ALLOY; COMPOSITES; FABRICATION; PARTICLES; TEXTURE;
D O I：
10.1016/S1003-6326(17)60145-6
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Hot compression behavior of Al6061/Al2O3 nanocomposite was investigated in the temperature range of 350-500 degrees C and the strain rate range of 0.0005-0.5 s(-1), in order to determine the optimum conditions for the hot workability of nanocomposite. The activation energy of 285 kJ/mol for the hot compression test is obtained by using hyperbolic sine function. By means of dynamic material model (DMM) and the corresponding processing map, safe zone for the hot workability of AA6061/Al2O3 is recognized at temperature of 450 degrees C and strain rate of 0.0005 s(-1) and at temperature of 500 degrees C and the strain rate range of 0.0005-0.5 s(-1), with the maximum power dissipation efficiency of 38%. Elongated and kinked grains are observed at 400 degrees C and strain rate of 0.5 s(-1) due to the severe deformation.
引用
收藏
页码：1248 / 1256
页数：9
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