国产EA4T车轴钢的缺口疲劳性能
Notch Fatigue Property of Domestic EA4T Axle Steel
摘 要
在国产EA4T车轴钢上截取光滑和缺口疲劳试样, 按照EN13261-2009标准测试了其旋转弯曲疲劳性能, 并观察了断口形貌。结果表明: 国产EA4T车轴钢的光滑和缺口疲劳强度均满足EN13261-2009的要求, 缺口试样的疲劳强度比光滑试样的低30%左右; 光滑试样的裂纹萌生于试样表面, 呈单源开裂, 缺口试样的裂纹萌生于缺口根部, 呈多源开裂; 未断缺口试样的缺口根部存在非扩展性裂纹。
旋转弯曲疲劳
缺口
非扩展裂纹
EA4T axle steel
rotating bending fatigue
notch
non propagating crack
Abstract
The rotating bending fatigue property of smooth and notched specimens cut from domestic EA4T axle steel was tested according to the standard of EN13261-2009 and the fracture morphology was observed. The results show that the fatigue strength of the domestic EA4T axle steel met the requirements of EN13261-2009, and the fatigue strength of the notched specimen was 30% less than that of the smooth specimen; the rotating bending fatigue cracks initiated from a single source on the surface of the smooth specimen, while the cracks in notched specimen were originated from several points around the notch root; non propagating cracks were also observed at the notch root of the non fractured notched specimen.
中图分类号 TH117.3 DOI 10.11973/jxgccl201510023
所属栏目 物理模拟与数值模拟
基金项目 国家科技支撑计划项目(2009BAG12A07-C02)
收稿日期 2014/7/29
修改稿日期 2015/8/28
网络出版日期
作者单位点击查看
备注景启明(1988-), 男, 湖北十堰人, 硕士研究生。
引用该论文: JING Qi-ming,QU Shun-de,JI Ya-qi,HAN Wei-xin,WANG Qun-di,ZHAO Xing-long. Notch Fatigue Property of Domestic EA4T Axle Steel[J]. Materials for mechancial engineering, 2015, 39(10): 106～110
景启明,曲顺德,季亚奇,韩维新,王群娣,赵兴龙. 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
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参考文献
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【2】NOVOSAD M, FAJKO R, EHA B, et al. Fatigue tests of railway axles［J］. Procedia Engineering, 2010, 2(1): 2259-2268.
【3】MADIA M, BERETTA S, SCHDEL M. Stress intensity factor solutions for cracks in railway axles［J］. Engineering Fracture Mechanics, 2011, 78(5): 764-792.
【4】张俊清, 周素霞, 谢基龙.缺口对车轴钢疲劳性能的影响［J］.北京交通大学学报, 2010, 34(4): 132-135.
【5】黄国, 黄海明, 王超, 等. 45#车轴钢疲劳性能试验研究［J］. 中国铁道科学, 2013, 35(4): 71-76.
【6】何忠, 姚伟伟. LZ50钢车轴的旋转弯曲疲劳性能［J］.机械工程材料, 2012, 36(1): 94-96.
【7】PILKEY W D. Peterson′s Stress Concentration Factors［M］. Second Edition. New York: John Wiley & Sons Inc., 1997: 123-123.
【8】SURESH S, RITCHIE R O.Propagation of short fatigue cracks［J］.International Metals Reviews, 1984, 29(1): 445-475.
【9】HADDAD M H E, TOPPER T H, SMITH K N.Prediction of non propagation cracks［J］.Engineering Fracture Mechanics, 1979, 11(3): 573-584.
【10】李锋, 何宇廷, 范超华, 等.疲劳小裂纹理论及其应用［J］.机械工程材料, 2007, 31(11): 6-9.
【11】ELBER W. The significance of fatigue crack closure［J］. ASTM STP, 1971, 486: 230-242.
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