Characterization of Hot Deformation Behavior of AMS 5708 Nickel-Based Superalloy Using Processing Map

被引：26
作者：
Amiri, A. [1 ]
Sadeghi, M. H. [1 ]
Ebrahimi, G. R. [2 ]
机构：
[1] Tarbiat Modares Univ, Dept Mech Engn, Tehran, Iran
[2] Hakim Sabzevari Univ, Fac Engn, Dept Mat & Polymer Engn, Sabzevar, Iran
来源：
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2013年 / 22卷 / 12期
关键词：
AMS; 5708; hot deformation; nickel-based superalloy; processing map; DYNAMIC RECRYSTALLIZATION; WORKING;
D O I：
10.1007/s11665-013-0677-x
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The hot deformation behavior of AMS 5708 nickel-based superalloy was investigated by means of hot compression tests and a processing map in the temperature range of 950-1200 degrees C and a strain rate range of 0.01-1 s(-1) was constructed. The true stress-true strain curves showed that the maximum flow stress decreases with the increase of temperature and decrease of strain rate. The developed processing map based on experimental data, showed variations of efficiency of power dissipation relating to temperature and strain rate at constant strain. Interpretation of the processing map showed one stable domain, in which dynamic recrystallization was the dominant microstructural phenomenon, and one instability domain with flow localization. The results of interpretation of flow stress curves and processing map were verified by the microstructure observations. There are two optimum conditions for hot working of this alloy with efficiency peak of 0.36: the first is at 1150 degrees C for a strain rate of 1 s(-1) that produces a fine grained microstructure. The second is at 1200 degrees C for a strain rate of 0.01 s(-1) that produces a coarse grained microstructure.
引用
收藏
页码：3940 / 3945
页数：6
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