DZ411定向凝固镍基合金蠕变性能的快速评估方法
A Rapid Evaluation Method for Creep Properties of Directionally Solidified Nickel-Based Alloy DZ411
摘 要
研究了预应变(0.5%,1.0%,1.5%,2.0%,2.5%)、加载应变速率(4.0×10-5,1.2×10-4,4.0×10-4 s-1)和连续温度应力松弛试验的初始温度(750,900 ℃)对DZ411定向凝固镍基合金应力松弛行为的影响;基于加工硬化和回复软化动态平衡的稳态变形,假设稳态松弛应变速率与传统蠕变持久试验的最小蠕变速率随应力的变化规律一致,通过短时应力松弛试验对最小蠕变速率进行预测,并进行验证。结果表明:试验合金在加工硬化和回复软化动态平衡时开始松弛,当预应变不低于1.0%时能快速达到稳态松弛;初始温度对稳态松弛行为的影响较小;加载应变速率会影响起始松弛应变速率,但对稳态松弛应变速率随应力变化的影响较小;通过稳态松弛应变速率主曲线可以预测不同温度、应力下的最小蠕变速率,蠕变持久试验结果均落在稳态松弛应变速率主曲线的99%可靠度曲线内。
高温应力松弛
蠕变
最小蠕变速率
松弛应变速率
directional solidified nickel-based alloy
stress relaxation test
creep
minimum creep rate
relaxation strain rate
Abstract
Effects of pre-strains (0.5%, 1.0%, 1.5%, 2.0%, 2.5%), loading strain rates (4.0×10-5, 1.2×10-4, 4.0×10-4 s-1) and initial temperatures (750, 900 ℃) of continuous temperature stress relaxation tests on directionally solidified nickel-based alloy DZ411 were studied. Based on steady-state deformation obtained by dynamic equilibrium of work hardening and recovery softening, assuming that the change of the steady-state relaxation strain rate with stress was consistent with that of the minimum creep rate of the traditional creep rupture test, the minimum creep rate was predicted and verified by short-term stress relaxation tests. The results show that the test alloy was relaxed when the work hardening and recovery softening were in dynamic equilibrium. When the pre-strain was not less than 1.0%, the steady-state relaxation could be quickly achieved. The initial temperature had little effect on the steady-state relaxation behavior. The loading strain rate affected the initial relaxation strain rate, but had little effect on the change of steady-state relaxation strain rate with stress. The minimum creep rates under different temperatures and stresses could be predicted by the master curve of steady-state relaxation strain rate. The creep rupture test results were located in the range of 99% reliable curve of the master curve of steady-state relaxation strain rate.
中图分类号 TG146.1 DOI 10.11973/jxgccl202307009
所属栏目 材料性能及应用
基金项目
收稿日期 2022/3/1
修改稿日期 2023/3/13
网络出版日期
作者单位点击查看
备注曹铁山(1985-),男,辽宁大连人,副教授,博士
引用该论文: CAO Tieshan,CHEN Qiao,WANG Wei,CHI Qingxin,CHENG Congqian,ZHAO Jie. A Rapid Evaluation Method for Creep Properties of Directionally Solidified Nickel-Based Alloy DZ411[J]. Materials for mechancial engineering, 2023, 47(7): 55～61
曹铁山,陈巧,王威,迟庆新,程从前,赵杰. DZ411定向凝固镍基合金蠕变性能的快速评估方法[J]. 机械工程材料, 2023, 47(7): 55～61
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【2】徐振,孙国栋,贾贺泽,等.Larson-Miller常数的优化求解及在持久寿命预测中的应用[J].热加工工艺,2015,44(4):94-96. XU Z,SUN G D,JIA H Z,et al.Optimization method for Larson-Miller constant and its application on rupture life prediction[J].Hot Working Technology,2015,44(4):94-96.
【3】许军,李会芳,程从前,等.基于应力松弛实验对服役25Cr35Ni型耐热钢的高温性能评估[J].材料工程,2017,45(8):96-101. XU J,LI H F,CHENG C Q,et al.High temperature performance evaluation of as-serviced 25Cr35Ni type heat-resistant steel based on stress relaxation tests[J].Journal of Materials Engineering,2017,45(8):96-101.
【4】SINHA N K,SINHA S.Stress relaxation at high temperatures and the role of delayed elasticity[J].Materials Science and Engineering:A,2005,393(1/2):179-190.
【5】BOSE S C, SINGH K,JAYARAMAN G.Application of stress relaxation test methodology for predicting creep life of a large steam turbine rotor steel (1CrMoV)[J].Journal of Testing and Evaluation,2003,31(3):19074.
【6】DALEO J A,ELLISON K A,WOODFORD D A.Application of stress relaxation testing in metallurgical life assessment evaluations of GTD111 alloy turbine buckets[J].Journal of Engineering for Gas Turbines and Power,1999,121(1):129-137.
【7】郭进全,轩福贞,王正东,等.基于短时应力松弛试验的蠕变行为预测方法[J].中国电机工程学报,2009,29(11):92-95. GUO J Q,XUAN F Z,WANG Z D,et al.Creep performance prediction method through short-term stress relaxation tests[J].Proceedings of the CSEE,2009,29(11):92-95.
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【9】WOODFORD D A.Evolution of a modern mechanical testing and design standard for high temperature materials[J].Materials Research Innovations,2016,20(5):379-389.
【10】WOODFORD D A.Performance-based creep strength and intrinsic ductility for a cast nickel-based superalloy[J].Materials at High Temperatures,2018,35(5):399-409.
【11】张健,王莉,王栋,等.镍基单晶高温合金的研发进展[J].金属学报,2019,55(9):1077-1094. ZHANG J,WANG L,WANG D,et al.Recent progress in research and development of nickel-based single crystal superalloys[J].Acta Metallurgica Sinica,2019,55(9):1077-1094.
【12】郭建亭.高温合金在能源工业领域中的应用现状与发展[J].金属学报,2010,46(5):513-527. GUO J T.The current situation of application and development of superalloys in the fields of energy industry[J].Acta Metallurgica Sinica,2010,46(5):513-527.
【13】袁超,郭建亭,杨洪才.定向凝固镍基高温合金的高温恒载拉伸蠕变行为[J].中国有色金属学报,1998,8(增刊2):202-205. YUAN C,GUO J T,YANG H C.Tensile creep behavior of directionally solidified nickel-base superalloy under high temperature and constant load[J].The Chinese Journal of Nonferrous Metals,1998,8(S2):202-205.
【14】李辉,楼琅洪,史学军,等.DZ411(DSM11)合金γ'粗化与持久性能[C]//第十一届中国高温合金年会论文集:动力与能源用高温结构材料.北京:中国学术期刊电子出版社,2007:402-404. LI H,LOU L H,SHI X J,et al.Coarsening of γ' precipitates and rupture life of DZ411 (DSM11) during long term thermal exposure[C]//Proceedings of the 11th China Annual Conference on Superalloys:High Temperature Structural Materials for Power and Energy.Beijing:China Academic Journal Electronic Publishing House,2007:402-404.
【15】曹铁山,方旭东,程从前,等.应力松弛方法研究2种HR3C耐热钢的高温蠕变行为[J].金属学报,2014,50(11):1343-1349. CAO T S,FANG X D,CHENG C Q,et al.Creep behavior of two kinds of HR3C heat resistant steels based on stress relaxation tests[J].Acta Metallurgica Sinica,2014,50(11):1343-1349.
【16】朱智,张立文,顾森东.Hastelloy C-276合金应力松弛试验及蠕变本构方程[J].中国有色金属学报,2012,22(4):1063-1067. ZHU Z,ZHANG L W,GU S D.Stress relaxation test of Hastelloy C-276 alloy and its creep constitutive equation[J].The Chinese Journal of Nonferrous Metals,2012,22(4):1063-1067.
【17】郭进全,田龙,张勇,等.基于蠕变数据的应力松弛行为预测模型与方法[J].机械强度,2011,33(5):685-689. GUO J Q,TIAN L,ZHANG Y,et al.Prediction models and methodology of stress relaxation property from creep data[J].Journal of Mechanical Strength,2011,33(5):685-689.
【18】LIN Y C,WEN D X,DENG J,et al.Constitutive models for high-temperature flow behaviors of a Ni-based superalloy[J].Materials & Design,2014,59:115-123.
【19】ORUGANTI R,SHUKLA A,NALAWADE S,et al.A microstructure-based model for creep of gamma prime strengthened nickel-based superalloys[J].Journal of Engineering Materials and Technology,2019,141(1):011001.
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