Hot Deformation Behaviour and Recrystallization Model of GH4169 Nickel Base Superalloy
摘 要
在变形温度900~1 100℃,应变速率0.01~5 s-1条件下对GH4169高温合金进行热压缩试验,研究了其显微组织及热变形行为。基于流变曲线构建了双曲正弦型Arrhenius本构方程,通过Avrami方程构建了临界动态再结晶模型。结果表明:GH4169高温合金在热压缩过程中发生了动态再结晶,且高温、低应变速率下的再结晶行为更显著;热压缩至应变量为0.2时,GH4169高温合金的本构方程为ε=1.37×1018[sinh (0.003 1σ)]6.13exp (-4.63×105/RT);动态再结晶临界值和峰值之间存在线性关系,1 100℃,0.01 s-1变形条件下的Avrami再结晶模型为XDRX=1-exp{-0.049[(ε-0.035 5)/0.089 9]2.132}。
Abstract
GH4169 superalloy was subjected to thermal compression test at deformation temperature of 900-1 100 ℃ and strain rate of 0.01-5 s-1, and the microstructure and hot deformation behaviour were studied. A hyperbolic sinusoidal Arrhenius constitutive equation was constructed on the basis of flow curves and a Avrami critical dynamic recrystallization model was constructed. The results show that GH4169 superalloy underwent dynamic recrystallization during hot compression process, and the recrystallization behaviour was more significant at relatively high temperatures and low strain rates. The constitutive equation of GH4169 superalloy was ε=1.37×1018[sinh(0.003 1σ)]6.13exp(-4.63×105/RT) when the thermal compression strain reached 0.2. There was a linear relationship between the dynamic recrystallization critical values and the peak values. The Avrami recrystallization model was XDRX=1-exp{-0.049[(ε-0.035 5)/0.089 9]2.132} at deformation temperature of 1 100 ℃ and strain rate of 0.01 s-1.
中图分类号 TG142.71 DOI 10.11973/jxgccl202009016
所属栏目 物理模拟与数值模拟
基金项目 江苏省重点研发计划项目(BE2017127);江苏高校“青蓝工程”项目(苏教师[2017]15号);太仓市科技计划(面上)项目(TC2019JC09)
收稿日期 2019/8/12
修改稿日期 2020/7/17
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备注王稳(1977-),女,河北沧县人,副教授,硕士
引用该论文: WANG Wen. Hot Deformation Behaviour and Recrystallization Model of GH4169 Nickel Base Superalloy[J]. Materials for mechancial engineering, 2020, 44(9): 87~91
王稳. GH4169镍基高温合金的热变形行为与再结晶模型[J]. 机械工程材料, 2020, 44(9): 87~91
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【4】李红宇,薛晶晶,刘倚天,等.核电用GH4169合金棒材315℃高周疲劳性能[J]. 材料热处理学报, 2019, 40(3): 82-87.
【5】LV P, SUN X, CAI J, et al. Microstructure and high temperature oxidation resistance of nickel based alloy GH4169 irradiated by high current pulsed electron beam[J]. Surface and Coatings Technology, 2017, 309: 401-409.
【6】吴昊, 孔祥伟, 罗平. GH4169合金高温变形过程本构方程[J]. 机械设计与制造, 2020, (8): 163-167.
【7】庄景云. 变形高温合金GH4169[M]. 北京: 冶金工业出版社, 2006.
【8】杨康, 祝志超, 张雪娇, 等. 镍基617合金的热变形和动态再结晶行为[J]. 材料热处理学报, 2019, 40(10): 151-157.
【9】王春霞. 变形铝硅合金的动态再结晶行为[D]. 沈阳: 东北大学, 2014.
【10】DOHERTY R D, HUGHES D A, HUMPHREYS F J, et al. Current issues in recrystallization: A review[J]. Materials Science and Engineering: A, 1997, 238: 219-274.
【11】HAN Y, YAN S, YIN B G, et al. Effects of temperature and strain rate on the dynamic recrystallization of a medium-high-carbon high-silicon bainitic steel during hot deformation[J]. Vacuum, 2018, 148: 78-87.
【12】MIRZADEH H, NAJAFIZADEH A. Prediction of the critical conditions for initiation of dynamic recrystallization[J]. Materials & Design, 2010, 31(3): 1174-1179.
【13】张云, 曹富荣, 林开珍, 等. GH4742高温合金的动态再结晶行为[J]. 中国有色金属学报, 2013, 23(11): 3091-3099.
【14】陈贵清, 傅高升, 王军德, 等. 3003铝合金热变形流变应力及动态再结晶模型[J]. 材料科学与工程学报, 2019, 37(2):210-232.
【15】谢兴华, 姚泽坤, 宁永权, 等. FGH4096合金的动态再结晶与晶粒细化研究[J]. 航空材料学报, 2011, 31(1): 20-24.
【16】许勇顺, 柳建韬, 聂明, 等. 金属热变形应力-应变曲线数学模型的研究与应用[J]. 应用科学学报, 1997(4): 379-384.
【17】SELLARS C M, MCTEGART W J. On the mechanism of hot deformation[J]. Acta Metallurgica, 1966, 14(9): 1136-1138.
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【22】MIRZADEH H, PARSA M H. Hot deformation and dynamic recrystallization of NiTi intermetallic compound [J]. Journal of Alloys and Compounds, 2014, 614: 56-59.
【23】权国政, 施瑞菊, 赵江, 等. AlCu4SiMg合金的动态再结晶体积分数模型构建及其在有限元模型中的应用[J]. 中国有色金属学报(英文版), 2019, 29(6): 1138-1151.
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