GH4169镍基高温合金的高温低周疲劳损伤机理
Low Cycle Fatigue Damage Mechanism of GH4169 Nickel-based Superalloy at Elevated Temperature
摘 要
对经过固溶+双时效热处理后的GH4169镍基高温合金进行650℃高温低周疲劳试验，研究了不同应力幅（550，600，650 MPa）下的循环响应特性，并观察了疲劳断口和二次裂纹形貌，分析了不同应力幅下的损伤机理。结果表明：不同应力幅下试验合金均表现出循环软化特性，且随着应力幅的增加，循环软化程度增强；当应力幅为550 MPa时，裂纹的扩展模式为穿晶扩展，二次裂纹主要在夹杂物和滑移带处萌生；当应力幅为650 MPa时，裂纹的扩展模式为穿晶-沿晶混合扩展，二次裂纹主要萌生于晶界和滑移带处；试验合金的变形机制由低应力幅时的平面滑移向高应力幅的交滑移转变。
应力幅值
循环软化
二次裂纹
GH4169 nickel-base superalloy
stress amplitude
cyclic softening
secondary crack
Abstract
Low cycle fatigue tests at elevated temperature of 650℃ were conducted on GH4169 nickel-based superalloy after solid solution and double aging treatments. The cyclic response characteristics at different stress amplitudes (550, 600, 650 MPa) were studied. The morphology of fatigue fracture and secondary cracks was observed. The damage mechanism at different stress amplitudes was analyzed. The results show that the tested alloy showed cyclic softening characteristics at different stress amplitudes, and the degree of softening increased with the increase of stress amplitude. The crack propagation showed the transgranular propagation mode at the stress amplitude of 550 MPa, and the secondary cracks were mainly generated at inclusions and slip bands. When the stress amplitude reached 650 MPa, the crack propagation mode became transgranular-intergranular mixed propagation, and the secondary cracks were mainly generated at grain boundaries and slip bands. The deformation mechanism of the tested alloy changed from planar slip at a low stress amplitude to cross slip at a high amplitude.
中图分类号 TG142.71 TG113.25 DOI 10.11973/jxgccl201901010
所属栏目 材料性能及应用
基金项目 东北大学航空动力装备振动及控制教育部重点实验室研究基金资助项目（VCAME201701）
收稿日期 2017/11/1
修改稿日期 2018/12/1
网络出版日期
作者单位点击查看
备注王磊(1981-),男,江苏徐州人,副教授,博士
引用该论文: WANG Lei,LIU Yanming,CHEN Gang,LIU Jun. Low Cycle Fatigue Damage Mechanism of GH4169 Nickel-based Superalloy at Elevated Temperature[J]. Materials for mechancial engineering, 2019, 43(1): 45～49
王磊,刘颜铭,陈刚,刘俊. GH4169镍基高温合金的高温低周疲劳损伤机理[J]. 机械工程材料, 2019, 43(1): 45～49
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参考文献
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【2】TAKAHASHI Y. Effect of cyclic loading on subsequent creep behaviour and its implications in creep-fatigue life assessment[J]. High Temperature Technology, 2015, 32:492-501.
【3】PINEAU A, ANTOLOVICH S D. High temperature fatigue of nickel-base superalloys-A review with special emphasis on deformation modes and oxidation[J]. Engineering Failure Analysis, 2009,16:2668-2697.
【4】QU S, FU C M, DONG C, et al. Failure analysis of the 1st stage blades in gas turbine engine[J]. Engineering Failure Analysis, 2013, 32:292-303.
【5】PRZYBYLA C P, MCDOWELL D L. Microstructure-sensitive extreme value probabilities for high cycle fatigue of Ni-base superalloy IN100[J]. International Journal of Plasticity, 2010, 26:372-394.
【6】MIAO J, POLLOCK T M, JONES J W. Crystallographic fatigue crack initiation in nickel-based superalloy René 88DT at elevated temperature[J]. Acta Materialia, 2009, 57(20):5964-5974.
【7】XU J H, HUANG Z W, JIANG L. Effect of heat treatment on low cycle fatigue of IN718 superalloy at the elevated temperatures[J]. Materials Science and Engineering:A, 2017, 690:137-145.
【8】FOURNIER D, PINEAU A. Low cycle fatigue behavior of Inconel 718 at 298 K and 823 K[J]. Metallurgical Transactions A, 1977, 8(7):1095-1105.
【9】PRASAD K, SARKAR R, GHOSAL P, et al. High temperature low cycle fatigue deformation behaviour of forged IN718 superalloy turbine disc[J]. Materials Science and Engineering:A, 2013, 568:239-245.
【10】ZHANG X C, LI H C, ZENG X, et al. Fatigue behavior and bilinear Coffin-Manson plots of Ni-based GH4169 alloy with different volume fractions of δ phase[J]. Materials Science and Engineering:A, 2017, 682:12-22.
【11】PRAVEEN K V U, SINGH V. Effect of heat treatment on Coffin-Manson relationship in LCF of superalloy IN718[J]. Materials Science and Engineering:A, 2008, 485(1):352-358.
【12】CHEN G, ZHANG Y, XU D K, et al. Low cycle fatigue and creep-fatigue interaction behavior of nickel-base superalloy GH4169 at elevated temperature of 650℃[J]. Materials Science and Engineering:A, 2016, 655:175-182.
【13】XIAO L, CHEN D L, CHATURVEDI M C. Cyclic deformation mechanisms of precipitation-hardened Inconel 718 superalloy[J]. Materials Science and Engineering:A, 2008, 483/484:369-372.
【14】ZHANG H Y, ZHANG S H, CHENG M, et al. Deformation characteristics of δ phase in the delta-processed Inconel 718 alloy[J]. Materials Characterization, 2010, 61(1):49-53.
【15】AZADIAN S, WEI L, WARREN R. Delta phase precipitation in Inconel 718[J]. Materials Characterization, 2004, 53(1):7-16.
【16】RUIZ C, OBABUEKI A, GILLESPIE K. Evaluation of the microstructure and mechanical properties of delta processed alloy 718[C]//Superalloys 1992. Warrendale, PA:TMS, 1992:33-42.
【17】秦承华,叶申,张显程,等. 晶粒尺寸对GH4169镍基合金疲劳小裂纹扩展的影响[J]. 机械工程材料,2016,40(2):11-20.
【18】MERRICK H F. The low cycle fatigue of three wrought nickel-base alloys[J]. Metallurgical Transactions, 1974, 5(4):891-897.
【19】MADERBACHER H, OBERWINKLER B, GÄNSER H P, et al. The influence of microstructure and operating temperature on the fatigue endurance of hot forged Inconel© 718 components[J]. Materilas Science and Engineering:A, 2013, 585:123-131.
【20】DENG G J, TU S T, ZHANG X C, et al. Small fatigue crack initiation and growth mechanisms of nickel-based superalloy GH4169 at 650℃ in air[J]. Engineering Fracture Mechanics, 2016, 134:433-450.
【21】曾旭,张显程,涂善东,等. 热处理对GH4169合金组织及低周疲劳寿命的影响[J].机械工程材料,2016,40(4):21-24.
【22】LIU Y H, NING Y Q, YAO Z K, et al. Plastic deformation and dynamic recrystallization of a powder metallurgical nickel-based superalloy[J]. Journal of Alloy and Compounds, 2016, 675:73-80.
【23】CHEN W, CHATURVEDI M C. Dependence of creep fracture of Inconel 718 on grain boundary precipitates[J]. Acta Materialia, 1997, 45(7):2735-2746.
【24】KUO C M, YANG Y T, BOR H Y, et al. Aging effects on the microstructure and creep behavior of Inconel 718 superalloy[J]. Materials Science and Engineering:A, 2009, 510(18):289-294.
【25】WEI D S, YANG X G. Investigation and modeling of low cycle fatigue behaviors of two Ni-based superalloys under dwell conditions[J]. International Journal of Pressure Vessels and Piping, 2009, 86(9):616-621.
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