X80管线钢疲劳裂纹的扩展行为
Fatigue Crack Growth Behavior of X80 Pipeline Steel
摘 要
对X80管线钢进行了拉伸试验和三点弯曲疲劳试验, 研究了该钢的拉伸断口形貌以及不同应力比(0.1, 0.4, 0.6)对疲劳裂纹扩展行为的影响。结果表明: X80管线钢具有连续屈服特征, 拉伸断口形貌呈韧窝状; 增大应力比会降低X80钢的疲劳寿命, 降低裂纹长度; 以应力强度因子幅值ΔK作为驱动参数, Paris公式可以很好地拟合不同应力比下X80管线钢的疲劳裂纹扩展速率。
疲劳裂纹扩展
应力比
X80 pipeline steel
fatigue crack growth
stress ratio
Abstract
Tensile test and three point bending fatigue test of X80 pipeline steel were carried out, and the tensile farcture and the effect of different stress ratios(0.1,0.4,0.6) on fatigue crack growth behavior were studied. The results show that X80 pipeline steel has the characteristics of continuous yielding and dimple tensile fracture. Increasing stress ration can decrease the fatigue life and the crack length of X80 steel. Paris′s law can well fit the fatigue crack growth rate of X80 pipeline steel at differnt stress ratios with stress intensity factor amplitude ΔK as driving parameter.
中图分类号 TG142.1 DOI 10.11973/jxgccl201508016
所属栏目 材料性能及其应用
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 2013/12/10
修改稿日期 2014/12/23
网络出版日期
作者单位点击查看
备注杨永和(1970-), 男, 甘肃靖远人, 博士研究生。
引用该论文: YANG Yong-he,LI Luo,XU Zhen,CHEN Xu. Fatigue Crack Growth Behavior of X80 Pipeline Steel[J]. Materials for mechancial engineering, 2015, 39(8): 75～78
杨永和,李珞,徐震,陈旭. X80管线钢疲劳裂纹的扩展行为[J]. 机械工程材料, 2015, 39(8): 75～78
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参考文献
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【3】LEVINS I.Causes and frequency of failures on gas mains in the USSR ［J］.Pipes & Pipelines International, 1993, 91(30): 9-13.
【4】BUSSIBA A, DARCIS P D, MCCOLSKEY J D, et al.Fatigue crack growth rates in six pipeline steels［C］// Proceeding of the 6nd International Pipeline Conference.Calgary: ASME, 2007: 475-484.
【5】SHAHANI A R, KASHANI H M, RASTEGAR M,et al. A unified model for the fatigue crack growth rate in variable stress ratio［J］.Fatigue Fract Eng Mater Struct,2009,32: 105-118.
【6】王树人, 崔志新.管线钢Rt0.5的测量误差分析［J］.焊管, 2005, 28(1): 54-56.
【7】高建忠, 马秋荣, 王长安, 等.国产X80管线钢的应变时效行为及预防措施［J］.机械工程材料, 2010, 34(1): 5-8.
【8】王树人, 叶苏锦, 王昱, 等.X80钢级板卷强度的分析与研究［J］.钢管, 2008, 37(6): 22-26.
【9】张亮, 王少刚, 马启慧, 等.2024铝合金电子束焊接接头的显微组织与力学性能［J］.机械工程材料, 2010, 34(12): 48-50.
【10】ZHAO J, MIYASHITA Y, MUTOH Y.Fatigue crack growth behavior of 95Pb-5Sn solder under various stress ratios and frequencies［J］.International Journal of Fatigue, 2000, 22: 665-673.
【11】POLAK J, ZEZULKA P.Short crack growth and fatigue life in austenitic-ferritic duplex stainless steel［J］.Fatigue & Fracture of Engineering Materials & Structures, 2005, 28: 923-935.
【12】KUMAR V, GERMAN M, SHIH C.An engineering approach for elastic-plastic fracture analysis［R］.Palo Alto, California: Electric Power Research Institute,1981.
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