Dynamic recrystallization behavior of a typical nickel-based superalloy during hot deformation

被引：493
作者：
Chen, Xiao-Min
Lin, Y. C. [1 ]
Wen, Dong-Xu
Zhang, Jin-Long
He, Min
机构：
[1] Cent South Univ, Sch Mech & Elect Engn, Changsha 410083, Hunan, Peoples R China
来源：
MATERIALS & DESIGN | 2014年 / 57卷
基金：
中国国家自然科学基金;
关键词：
Dynamic recrystallization; Nickel-based superalloy; Microstructure; Grain size; MARTENSITIC STAINLESS-STEEL; MICROSTRUCTURE EVOLUTION; 42CRMO STEEL; STATIC RECRYSTALLIZATION; ISOTHERMAL COMPRESSION; HIGH-TEMPERATURE; MAGNESIUM ALLOY; KINETICS MODEL; FLOW-STRESS; STRAIN-RATE;
D O I：
10.1016/j.matdes.2013.12.072
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The dynamic recrystallization (DRX) behavior of a typical nickel-based superalloy is investigated by the hot compression tests. Based on the conventional DRX kinetics model, the volume fractions of DRX are firstly estimated. Results show that there is an obvious deviation between the experimental and predicted volume fractions of DRX when the forming temperature is below 980 degrees C, which is induced by the slow dynamic recrystallization rate under low forming temperatures. Therefore, the segmented models are proposed to describe the kinetics of DRX for the studied superalloy. Comparisons between the experimental and predicted results indicate that the proposed segmented models can give an accurate and precise estimation of the volume fractions of DRX for the studied superalloy. In addition, the optical observation of the deformed microstructure confirms that the dynamically recrystallized grain size can be well characterized by a power function of Zener-Hollumon parameter. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：568 / 577
页数：10
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