拉伸保载对2.25Cr1MoV钢高温低周疲劳行为的影响
Effect of Tensile Holding on High Temperature Low Cycle Fatigue Behavior of 2.25Cr1MoV Steel
摘 要
利用液压疲劳试验机, 采用轴向应变控制方法在455 ℃下对2.25Cr1MoV钢进行高温低周疲劳试验, 通过在峰值应变拉伸时保载0,60,600 s, 研究了拉伸保载时间对该钢低周疲劳行为的影响, 并用扫描电镜对断口形貌进行了观察。结果表明: 2.25Cr1MoV钢呈明显的循环软化特性, 拉伸保载会明显降低循环应力幅, 但保载时间对循环应力幅的影响不大; 拉伸保载使该钢的疲劳寿命降低, 但保载时间超过60 s后, 疲劳寿命基本不受保载时间的影响; 拉伸保载没有改变试验钢的疲劳断裂模式。
低周疲劳
循环软化
拉伸保载
蠕变-疲劳
2.25Cr1MoV steel
low cycle fatigue
cyclic softening
tensile holding load
creep-fatigue
Abstract
High temperature low cycle fatigue test was carried out on 2.25Cr1MoV steel by using a hydraulic fatigue testing system under strain-controlled mode at 455 ℃. Different tensile hold time (0, 60, 600 s) was imposed at peak strain to study the effect of tensile holding load time on low cycle fatigue behavior of the steel. The fracture morphology of the steel was observed by scanning electron microscopy. The results reveal that the steel showed cyclic softening characteristics. The applied tensile holding load caused the stress amplitude obviously reduced, but the holding load time had little effect on cyclic stress amplitude. The fatigue life of the steel decreased because of tensile holding, but the life changed little when holding time exceeded 60 s.The fracture mode was not changed by the tensile holding load.
中图分类号 TG142.73 DOI 10.11973/jxgccl201603001
所属栏目 试验研究
基金项目 国家自然科学基金资助项目(51435012);教育部博士点基金资助项目(20130032110018)
收稿日期 2015/2/2
修改稿日期 2015/11/30
网络出版日期
作者单位点击查看
备注田阳(1988-), 男, 河南南阳人, 硕士研究生。
引用该论文: TIAN Yang,ZHAO Zi-zhen,CHEN Wei-feng,CHEN Xu. Effect of Tensile Holding on High Temperature Low Cycle Fatigue Behavior of 2.25Cr1MoV Steel[J]. Materials for mechancial engineering, 2016, 40(3): 1～5
田阳,赵姿贞,陈巍峰,陈旭. 拉伸保载对2.25Cr1MoV钢高温低周疲劳行为的影响[J]. 机械工程材料, 2016, 40(3): 1～5
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【3】杨易坤. 2.25Cr1Mo0.25V钢厚壁锻件性能热处理研究［J］. 大型铸锻件, 2014(3): 16-19.
【4】ELLIS J R, JAKUB M T, JASKE C E, et al. Elevated temperature fatigue and creep-fatigue properties of annealed 2.25Cr1Mo steel［M］//Structural materials for service at elevated temperatures in nuclear power generation. ［S.l.］:［s.n］,1975.
【5】BRINKMAN C R, STRIZAK J P, BOOKER M K, et al. Time-dependent strain-controlled fatigue behavior of annealed 2.25Cr1Mo steel for use in nuclear steam generator design［J］. Journal of Nuclear Materials, 1976, 62(2): 181-204.
【6】CHALLENGER K D, MILLER A K, BRINKMAN C R. An explanation for the effects of hold periods on the elevated temperature fatigue behavior of 2.25Cr1Mo Steel［J］. Journal of Engineering Materials and Technology,1981,103(1):7-14.
【7】KSCHINKA B A, STUBBINS J F. Creep-fatigue-environment interaction in a bainitic 2.25Cr1Mo steel forging［J］. Materials Science and Engineering: A, 1989, 110: 89-102.
【8】OGATA T, YAGUCHI M. Damage mechanism in weldment of 2.25Cr1Mo steel under creep-fatigue loading［J］. Engineering Fracture Mechanics, 2007, 74(6): 947-955.
【9】叶小松, 刘应虎, 田洪波,等. 采用窄间隙埋弧焊焊接 2.25 Cr-1Mo-0.25 V 钢的试验及应用研究［J］. 大型铸锻件, 2009 (5): 30-33.
【10】宋立平, 孙荣禄. 2.25Cr1Mo0.25 V钢焊缝的性能研究［J］. 热加工工艺, 2012,41(21):15-17.
【11】闫佳佳, 安红萍. 锻态 2.25 Cr1Mo0.25V钢奥氏体晶粒长大规律的研究［J］. 大型铸锻件, 2013 (4): 23-26.
【12】薛永栋, 晋帅勇, 汪勇, 等. 2.25 Cr1Mo0.25V加氢模拟环锻件钢的冶炼［J］. 大型铸锻件, 2013(2): 48-50.
【13】于涛, 施惠基. 长期高温使用后2.25 Cr1Mo 钢焊接接头热影响区的蠕变损伤［J］. 机械工程材料, 2011, 35(4): 1-3.
【14】EFEBVRE D L, ELLYIN F. Cyclic response and inelastic strain energy in low cycle fatigue［J］. International Journal of Fatigue, 1984, 6(1): 9-15.
【15】SHI D, LIU J, YANG X, et al. Experimental investigation on low cycle fatigue and creep-fatigue interaction of DZ125 in different dwell time at elevated temperatures［J］. Materials Science and Engineering: A, 2010, 528(1): 233-238.
【16】GOSWAMI T, HNNINEN H. Dwell effects on high temperature fatigue behavior-part I［J］. Materials & Design, 2001, 22(3): 199-215.
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