Effect of pre-treatment on hot deformation behavior and processing map of an aged nickel-based superalloy

被引：74
作者：
He, Dao-Guang [1 ,2 ]
Lin, Y. C. [1 ,2 ,3 ]
Chen, Ming-Song [1 ,3 ]
Chen, Jian [4 ]
Wen, Dong-Xu [1 ,3 ]
Chen, Xiao-Min [1 ,3 ]
机构：
[1] Cent S Univ, Sch Mech & Elect Engn, Changsha 410083, Peoples R China
[2] Cent S Univ, Light Alloy Res Inst, Changsha 410083, Peoples R China
[3] State Key Lab High Performance Complex Mfg, Changsha 410083, Peoples R China
[4] Changsha Univ Sci & Technol, Sch Energy & Power Engn, Key Lab Efficient & Clean Energy Utilizat, Changsha 410114, Hunan, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2015年 / 649卷
基金：
美国国家科学基金会;
关键词：
Alloy; Hot deformation; Processing map; Microstructure; Pre-treatment; NI-BASED SUPERALLOY; DYNAMIC RECRYSTALLIZATION BEHAVIOR; MODIFIED JOHNSON-COOK; HIGH-TEMPERATURE DEFORMATION; AZ80 MAGNESIUM ALLOY; MG-CU ALLOY; CONSTITUTIVE MODEL; 42CRMO STEEL; FLOW BEHAVIOR; MICROSTRUCTURAL EVOLUTION;
D O I：
10.1016/j.jallcom.2015.07.213
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：
Hot deformation behaviors of two pre-treated nickel-based superalloys are investigated over wide ranges of strain rate and temperature. Based on the theory of dynamic material model (DMM), the processing maps are developed and correlated with the deformed microstructures. The effects of pre-treatment, including water-cooling and furnace-cooling pre-treatments, on the hot deformation behavior and processing maps are discussed in detail. It is found that the hot deformation behavior and processing map of the aged superalloy are sensitive to pre-treatment. The peak stress of the aged superalloy after furnace-cooling pre-treatment is larger than that after water-cooling pre-treatment. Considering the coupled effects of deformation temperature, strain and strain rate, the phenomenological constitutive models of two pre-treated nickel-based superalloys are established. Meanwhile, the flow instability domains of the aged superalloy after furnace-cooling pre-treatment are narrower than those after water-cooling pre-treatment. At the true strain of 0.6, the flow instability domain of the aged superalloy after water-cooling pre-treatment is (920-1010 degrees C, 0.1-1s(-1)), while that after furnace-cooling pre-treatment is (930-970 degrees C, 0.1-1s(-1)). Additionally, the dynamic recrystallized grain size of the studied superalloy after furnace-cooling pre-treatment is smaller than that after water-cooling pre-treatment. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：1075 / 1084
页数：10
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