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缺陷对EA4T车轴钢疲劳性能的影响

李行 张继旺 徐俊生 苏凯新 张金鑫 鲁连涛 吴明泽

李行, 张继旺, 徐俊生, 苏凯新, 张金鑫, 鲁连涛, 吴明泽. 缺陷对EA4T车轴钢疲劳性能的影响[J]. 西南交通大学学报, 2021, 56(3): 627-633. doi: 10.3969/j.issn.0258-2724.20190373
引用本文: 李行, 张继旺, 徐俊生, 苏凯新, 张金鑫, 鲁连涛, 吴明泽. 缺陷对EA4T车轴钢疲劳性能的影响[J]. 西南交通大学学报, 2021, 56(3): 627-633. doi: 10.3969/j.issn.0258-2724.20190373
LI Hang, ZHANG Jiwang, XU Junsheng, SU Kaixin, ZHANG Jinxin, LU Liantao, WU Mingze. Effect of Defect on Fatigue Property of EA4T Axle Steel[J]. Journal of Southwest Jiaotong University, 2021, 56(3): 627-633. doi: 10.3969/j.issn.0258-2724.20190373
Citation: LI Hang, ZHANG Jiwang, XU Junsheng, SU Kaixin, ZHANG Jinxin, LU Liantao, WU Mingze. Effect of Defect on Fatigue Property of EA4T Axle Steel[J]. Journal of Southwest Jiaotong University, 2021, 56(3): 627-633. doi: 10.3969/j.issn.0258-2724.20190373

缺陷对EA4T车轴钢疲劳性能的影响

doi: 10.3969/j.issn.0258-2724.20190373
基金项目: 国家自然科学基金(51675445,U1534209);
详细信息
    作者简介:

    李行(1995—),男,博士研究生,研究方向为材料和结构的疲劳与断裂,E-mail:1115994062@qq.com

    通讯作者:

    张继旺(1983—),男,研究员,研究方向为材料和结构的疲劳与断裂,E-mail:zhangjiwang@swjtu.cn

  • 中图分类号: U467.497

Effect of Defect on Fatigue Property of EA4T Axle Steel

  • 摘要: 为了研究和准确评估不同尺寸的缺陷对EA4T车轴钢疲劳性能的影响,采用钻孔法在光滑试样表面人为引入缺陷,使用旋转弯曲疲劳试验机对光滑试样和不同尺寸缺陷的试样进行疲劳试验,以获得不同试样的疲劳极限;使用扫描电镜(SEM)观察断口形貌,使用Neuber公式(基于缺口敏感性)和修正的El-Haddad模型(基于断裂力学方法)评估带缺陷试样的疲劳极限. 研究结果表明:当试样等效缺陷尺寸小于59.64 μm时,其疲劳极限与光滑试样相同,都为360 MPa;当等效缺陷尺寸大于59.64 μm时,缺陷会降低光滑试样的疲劳极限,并且引入缺陷尺寸越大,疲劳极限越低;基于Neuber公式预测的疲劳强度能得到较为保守的疲劳强度估算值,而修正的El-Haddad模型可以更好地预测和评估不同尺寸的圆孔型三维缺陷对EA4T车轴钢疲劳强度的影响.

     

  • 图 1  试样显微组织

    Figure 1.  Microstructure of the specimens

    图 2  缺陷试样形状及尺寸

    Figure 2.  Shape and dimension of specimen with defect

    图 3  试样表面不扩展微裂纹

    Figure 3.  Non-propagating crack on the surface of the specimen

    图 4  光滑试样疲劳断口观察

    Figure 4.  Fracture surface observations of the smooth specimen

    图 5  有限元仿真及结果

    Figure 5.  Finite element simulation and results

    图 6  3种模型与试验结果对比

    Figure 6.  Comparison of three models and experimental results

    表  1  EA4T化学成分(质量分数)

    Table  1.   Chemical compositions of EA4T steel %

    元素CSiMnPSCrCuNiMoFe
    质量分数0.270.390.720.00750.00131.110.010.250.25余量
    下载: 导出CSV

    表  2  缺陷尺寸

    Table  2.   Defect size μm

    试样编号dhS
    1 100 50 59.64
    2 100 100 92.50
    3 200 200 185.00
    4 300 300 277.51
    5 500 500 462.51
    6 1000 1000 925.02
    下载: 导出CSV

    表  3  不同试样的疲劳极限

    Table  3.   Fatigue limit of different specimen

    试样编号d/μmh/μmσw/MPa
    光滑试样 0 0 360
    1 100 50 360
    2 100 100 330
    3 200 200 290
    4 300 300 280
    5 500 500 240
    6 1000 1000 190
    下载: 导出CSV

    表  4  模拟结果

    Table  4.   Simulated results

    试样编号F/Nσnom/MPaσpeak/MPa
    1 158.27 390 787.5
    2 146.09 360 778.3
    3 129.86 320 690.5
    4 125.80 310 703.3
    5 109.57 270 639.7
    6 89.28 220 544.6
    下载: 导出CSV

    表  5  疲劳极限预测结果

    Table  5.   Result of fatigue limit prediction

    试样编号qKtKfσest/MPaσw/MPaε/%
    1 0.44 2.02 1.45 249 360 −31
    2 0.44 2.16 1.51 238 325 −27
    3 0.53 2.16 1.61 223 290 −23
    4 0.57 2.26 1.73 208 280 −26
    5 0.64 2.37 1.87 195 240 −20
    6 0.71 2.48 2.05 175 190 −8
    下载: 导出CSV
  • 马利军. 断裂力学的含缺陷车轴服役寿命评估方法研究[D]. 北京: 北京交通大学, 2016.
    徐忠伟. 高速铁路外物损伤车轴疲劳评估方法[D]. 成都: 西南交通大学, 2018.
    吴圣川,徐忠伟,康国政,等. 外物损伤对合金车轴钢疲劳性能的影响[J]. 西南交通大学学报,2018,40(9): 1000-1005.

    WU Shengchuan, XU Zhongwei, KANG Guozheng, et al. Fatigue strength of railway axle used alloy steel due to foreign object damage[J]. Journal of Southwest Jiaotong University, 2018, 40(9): 1000-1005.
    周素霞. 高速列车空心车轴损伤容限理论与方法研究[D]. 北京: 北京交通大学, 2010.
    高杰维,戴光泽,赵君文,等. 压痕对车轴钢疲劳极限的影响[J]. 工程科学学报,2016,38(6): 827-833.

    GAO Jiewei, DAI Guangze, ZHAO Junwen, et al. Indentation effect on the fatigue limit of axle steel[J]. Chinese Journal of Engineering, 2016, 38(6): 827-833.
    景启明,曲顺德,季亚奇,等. 国产EA4T车轴钢的缺口疲劳性能[J]. 机械工程材料,2015,39(10): 106-110. doi: 10.11973/jxgccl201510023

    JING Qiming, QU Shunde, JI Yaqi, et al. Notch fatigue property of domestic EA4T axle steel[J]. Materials for Mechanical Engineering, 2015, 39(10): 106-110. doi: 10.11973/jxgccl201510023
    BERETTA S, GHIDINI A, LOMBARDO F. Fracture mechanics and scale effects in the fatigue of railway axles[J]. Engineering Fracture Mechanics, 2005, 72(2): 195-208. doi: 10.1016/j.engfracmech.2003.12.011
    MURAKAMI Y. Metal fatigue: effects of small defects and nonmetallic inclusions[M]. Tokyo: Elsevier, 2002: 35-55.
    PETERSON R E. Stress concentration design factors[M]. New York: [s.n.], 1953: 28.
    NEUBER H. Theory of notch stresses: principles for exact calculation of strength with reference to structural form and material[M]. Second Edition. Berlin: Springer-Verlag, 1958: 230-238.
    STEPHENS R I, FATEMI A, STEPHENS R R. Metal fatigue in engineering[M]. Second Edition. New York: [s.n.], 2001: 196-200.
    EL-HADDAD M, TOPPER T H, SMITH K N. Prediction of non propagating cracks[J]. Engineering Fracture Mechanics, 1979, 11(3): 573-584. doi: 10.1016/0013-7944(79)90081-X
    KITAGAWA H, TAKAHASHI S. Applicability of fracture mechanics to very small cracks or the cracks in the early stage[C]//Proceedings of The Second International Conference on Mechanical Behavior of Materials. Metals Park: ASM International, 1976: 627-631.
    ATZORI B, LAZZARIN P, MENEGHETTI G. Fracture mechanics and notch sensitivity[J]. Fatigue & Fracture of Engineering Materials & Structures, 2010, 26(3): 257-267.
    MURAKAMI Y, ENDO M. Quantitative evaluation of fatigue strength of metals containing various small defects or cracks[J]. Engineering Fracture Mechanics, 1983, 17(1): 1-15. doi: 10.1016/0013-7944(83)90018-8
    REGAZZI D, BERETTA S, CARBONI M. An investigation about the influence of deep rolling on fatigue crack growth in railway axles made of a medium strength steel[J]. Engineering Fracture Mechanics, 2014, 131: 587-601. doi: 10.1016/j.engfracmech.2014.09.016
    POKORNY P, VOJTEK T, NÁHLÍK L, et al. Crack closure in near-threshold fatigue crack propagation in railway axle steel EA4T[J]. Engineering Fracture Mechanics, 2017, 185: 2-19. doi: 10.1016/j.engfracmech.2017.02.013
    WU S C, XU Z W, KANG G Z, et al. Probabilistic fatigue assessment for high-speed railway axles due to foreign object damage[J]. International Journal of Fatigue, 2018, 117: 90-100. doi: 10.1016/j.ijfatigue.2018.08.011
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出版历程
  • 收稿日期:  2019-05-14
  • 修回日期:  2019-10-17
  • 网络出版日期:  2021-02-01
  • 刊出日期:  2021-06-15

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