Deformation and Microstructure Evolution in Co-Ni-Cr-Mo Superalloy during Hot Working

被引：22
作者：
Kartika, Ika [1 ]
Matsumoto, H. [1 ]
Chiba, A. [1 ]
机构：
[1] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
来源：
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2009年 / 40A卷 / 06期
关键词：
RECRYSTALLIZATION; TEMPERATURE; DEPENDENCE; BEHAVIOR;
D O I：
10.1007/s11661-009-9829-x
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Deformation and microstructure evolution in Co-33Ni-20Cr-10Mo superalloy during hot deformation are studied by carrying out compression tests between 950 A degrees C and 1200 A degrees C with an increment of 50 A degrees C at strain rates of 0.1, 1, 10, and 30 s(-1). The flow curves obtained for the aforementioned strain rates in this temperature range show that this alloy has high work-hardening characteristics; this is due to the strong dislocation-solute interactions associated with dynamic strain aging (DSA). Microstructures deformed at temperatures up to 1050 A degrees C consist of numerous deformation twins and highly dense dislocations, which are attributed to the high activation energy for deformation and the relatively low strain-rate sensitivity m in the temperature range of 950 A degrees C to 1200 A degrees C. Dynamic recrystallization (DRX), which is dependent on the strain rate, occurs at T = 1000 A degrees C, 1050 A degrees C, 1100 A degrees C, 1150 A degrees C, and 1200 A degrees C.
引用
收藏
页码：1457 / 1468
页数：12
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