High temperature rheological behavior and microstructure evolution of GH3128 alloy

doi:10.13251/j.issn.0254-6051.2020.06.030

Abstract

Abstract: Rheological characteristics of the GH3128 alloy at deformation temperature of 950-1150 ℃, strain rate of 0.01-10 s^-1 and strain rate of 30%-70% were studied by means of thermal simulation compression test. The constitutive equation of the GH3128 alloy was established based on the flow stress curves of the alloy and the Arrhenius model, and the hot processing map with deformation of 30%-65% was obtained. The relationship between the microstructure evolution and the plastic deformation parameters of the alloy during high temperature deformation was determined by combining the complete recrystallization condition diagram. Through the metallographic analysis, the evolution of carbides during hot deformation was investigated. The results show that the activation energy for hot working of the alloy is about 305 kJ/mol, and the reasonable processing zone is: deformation temperature 1050-1100 ℃, strain rate about 0.1 s^-1, in which the carbide in the alloy is substantially dissolved back, the microstructure is recrystallized sufficiently, and the grain size can be controlled to be less than 10 μm.

Key words: GH3128 alloy, constitutive equation, hot processing map, dynamic recrystallization, carbide

CLC Number:

TG146

Liu Tingyao, Lai Yu, Fu Jianhui, Wei Yujun, He Yunhua, Pei Binghong. High temperature rheological behavior and microstructure evolution of GH3128 alloy[J]. Heat Treatment of Metals, 2020, 45(6): 141-148.

References

[1]傅宏镇, 陈玉平, 魏育环, 等. 碳、钨、钼和铁对GH128合金显微组织和性能的影响[J]. 钢铁研究总院学报, 1985, 5(1): 75-82.
Fu Hongzheng, Chen Yuping, Wei Yuhuan, et al. Influence of C, W, Mo and Fe on the microstructure and properties of alloy GH318[J]. Central Iron and Streel Research Institute Technical Bulletin, 1985, 5(1): 75-82.
[2]赵熹, 原鲲, 周羽. GH3128高温拉伸强度设计方法的优化[J]. 清华大学学报(自然科学版), 2015, 55(9): 998-1002.
Zhao Xi, Yuan Kun, Zhou Yu. Optimization of the high temperature tensile strength design method for the GH3128 alloy[J]. Journal of Tsinghua University (Science and Technology), 2015, 55(9): 998-1002.
[3]傅宏镇, 张旭瑶, 吴长钧, 等. GH128合金的析出相及其对力学性能的影响[J]. 钢铁研究总院学报, 1985, 5(4): 307-404.
Fu Hongzhen, Zhang Xuyao, Wu Changjun, et al. Precipitated phases and their influence on the mechanical properties of superalloy GH128[J]. Central Iron and Streel Research Institute Technical Bulletin, 1985, 5(4): 307-404.
[4]吴常钧, 金哲学. 长期时效和晶粒度对GH333和GH128合金热疲劳的影响[J]. 钢铁研究总院学报, 1986, 6(2): 38-46.
Wu Changjun, Jin Zhexue. Influence of long-term aging and grain size on thermal fatigue property of GH333 and GH128 alloys[J]. Central Iron and Streel Research Institute Technical Bulletin, 1986, 6(2): 38-46.
[5]原鲲, 赵熹, 叶萍, 等. 确定GH3128高温拉伸性能设计许用值的方法[J]. 清华大学学报(自然科学版), 2014, 54(9): 1236-1239.
Yuan Kun, Zhao Xi, Ye Ping, et al. Methodology for determining high temperature tensile design allowable strengths of alloy GH3128[J]. Journal of Tsinghua University(Science and Technology), 2014, 54(9): 1236-1239.
[6]王哲仁, 邵焕平, 张红英. 不同固溶处理对GH128晶粒度和显微组织的影响[J]. 机械工程材料, 1994, 18(4): 26-28.
Wang Zheren, Shao Huanping, Zhang Hongying. Effects of different solution treatments on microstructure and grain size of GH138 surperalloy[J]. Materials for Mechanical Engineering, 1994, 18(4): 26-28.
[7]冯贞伟, 高腾飞, 邵天威, 等. C/C复合材料与镍基高温合金GH3128钎焊[J]. 焊接学报, 2015, 36(12): 105-108.
Feng Zhenwei, Gao Tengfei, Shao Tianwei, et al. Brazing of C/C composite and Ni-based high temperature alloy GH3128[J]. Transactions of the China Welding Institution, 2015, 36(12): 105-108.
[8]董建新. 镍基合金管材挤压及组织控制[M]. 北京: 冶金工业出版社, 2014.
[9]Shi C, Mao W, Chen X G. Evolution of activation energy during hot deformation of AA7150 aluminum alloy[J]. Materials Science and Engineering A, 2013, 571(9): 83-91.
[10]Sakthivel T, Laha K, Nandagopal M, et al. Effect of temperature and strain rate on serrated flow behaviour of Hastelloy X[J]. Materials Science and Engineering A, 2012, 534(3): 580-587.
[11]Mcqueen H J, Yue S, Ryan N D, et al. Hot working characteristics of steels in austenitic state[J]. Journal of Materials Processing Technology, 1995, 53(1/2): 293-310.
[12]Jonas J J, Sellars C M, Tegart W J M. Strength and structure under hot-working conditions[J]. Metallurgical Reviews, 1969, 14(1): 1-24.
[13]Oh S I. Finite element analysis of metal forming processes with arbitrarily shaped dies[J]. International Journal of Mechanical Sciences, 1982, 24(8): 479-493.
[14]Prasad Y V R K, Gegel H L, Doraivelu S M, et al. Modeling of dynamic material behavior in hot deformation: Forging of Ti-6242[J]. Metallurgical Transactions A, 1984, 15(10): 1883-1892.
[15]Murty S V S N, Rao B N, Kashyap B P. Development and validation of a processing map for zirconium alloys[J]. Modelling and Simulation in Materials Science and Engineering, 2002, 10(5): 503-520.
[16]俞年年, 项金钟, 郑文杰. Monel K-500合金的热变形行为及热加工图[J]. 热加工工艺, 2018, 47(7): 172-176.
Yu Niannian, Xiang Jinzhong, Zheng Wenjie. Hot deformation behavior and hot processing map of Monel K-500 alloy[J]. Hot Working Technology, 2018, 47(7): 172-176.