F690海洋工程钢在大气中不同应力条件下的疲劳极限及裂纹扩展行为
Fatigue Limit and Crack Propagation Behavior of F690 Marine Steel inAir under Different Stress Conditions
摘 要
在大气中不同应力条件下对F690钢进行高频疲劳试验和基于直流电压降的疲劳裂纹扩展速率试验，结合断口分析，对比研究了应力幅和应力比对F690钢疲劳性能和裂纹萌生、扩展的影响。结果表明：F690钢在应力比为-1，0.1，0.2，0.3时的条件疲劳极限分别约为313，264，250，246 MPa，条件疲劳极限随应力比的增大而减小；F690钢中的疲劳裂纹以条带机制扩展，断裂方式为穿晶断裂；随着应力幅的增大，疲劳辉纹间距和二次裂纹尺寸增加，疲劳裂纹扩展速率增大；随着应力比的增大，F690钢的疲劳裂纹扩展速率增大，且在裂纹扩展中后期变化较大，疲劳裂纹扩展门槛值减小。
高频疲劳
应力幅
应力比
裂纹扩展速率
marine steel
high frequency fatigue
stress amplitude
stress ratio
crack growth rate
Abstract
The high frequency fatigue test and fatigue crack growth rate test based on DC voltage drop were conducted on F690 steel in air under different stress conditions. Combined with fracture surface analysis, effects of stress amplitude and stress ratio on fatigue properties and initiation and growth of cracks of F690 steel were studied and compared. The results show that the conditional fatigue limit of F690 steel at stress ratios of -1, 0.1, 0.2, 0.3 was 313, 264, 250, 246 MPa, respectively, which decreased with increasing stress ratio. The fatigue cracks in F690 steel propagated with band mechanism and the mode of fracture was transgranular fracture. As the stress amplitude increased, the fatigue crack spacing and secondary crack size increased, and the fatigue crack growth rate also increased. With increasing stress ratio, the fatigue crack growth rate of F690 steel increased and changed significantly at the middle and later stages of crack growth, and the fatigue crack growth threshold decreased.
中图分类号 TG172.5 DOI 10.11973/jxgccl202009003
所属栏目 试验研究
基金项目 江苏省大学生创新创业训练计划项目（201911276004Z， 202011276066Y）；国家自然科学基金青年科学基金资助项目（51801098）；江苏省高等学校自然科学研究面上项目（18KJB130003）
收稿日期 2019/9/23
修改稿日期 2020/8/6
网络出版日期
作者单位点击查看
备注王琪(1997-),男,江苏丹阳人,硕士研究生
引用该论文: WANG Qi,ZHANG Zhen,YANG Yang,GUO Mengyu,HU Zhengfei,GAO Shan. Fatigue Limit and Crack Propagation Behavior of F690 Marine Steel inAir under Different Stress Conditions[J]. Materials for mechancial engineering, 2020, 44(9): 17～23
王琪,张振,杨阳,郭孟雨,胡正飞,高珊. F690海洋工程钢在大气中不同应力条件下的疲劳极限及裂纹扩展行为[J]. 机械工程材料, 2020, 44(9): 17～23
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参考文献
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【2】RONG Y M, LEI T, XU J J, et al. Residual stress modelling in laser welding marine steel EH36 considering a thermodynamics-based solid phase transformation[J]. International Journal of Mechanical Sciences, 2018, 146:180-190.
【3】张振, 王琪, 张才毅,等. 海洋工程用D36、F460和F690钢在模拟海水中的电化学腐蚀行为[J].机械工程材料, 2019,43(8):27-34.
【4】张杰, 蔡庆伍, 武会宾,等. 快速加热回火对690 MPa级海洋工程用钢组织和性能的影响[J].金属学报, 2013,49(12):1549-1557.
【5】MA H C, LIU Z Y, DU C W, et al. Effect of cathodic potentials on the SCC behavior of E690 steel in simulated seawater[J].Materials Science and Engineering: A, 2015,642:22-31.
【6】梁永梅, 黄一, 吴智敏.加载波形对D36钢腐蚀疲劳裂纹扩展速率的影响[J].腐蚀与防护, 2016,37(4): 289-293.
【7】王恒, 苏波泳, 花国然, 等. 海洋工程装备材料E690高强钢腐蚀疲劳裂纹扩展实验研究[J].热加工工艺, 2016,45(16): 48-51.
【8】ZHAO T L, LIU Z Y, DU C W, et al. Corrosion fatigue crack initiation and initial propagation mechanism of E690 steel in simulated seawater[J]. Materials Science and Engineering: A, 2017,708: 181-192.
【9】IGWEMEZIE V, DIRISU P, MEHMANPARAST A. Critical assessment of the fatigue crack growth rate sensitivity to material microstructure in ferrite-pearlite steels in air and marine environment [J]. Materials Science and Engineering: A, 2019,754:750-765.
【10】DU D H, CHEN K, YU L, et al. SCC crack growth rate of cold worked 316L stainless steel in PWR environment [J]. Journal of Nuclear Materials, 2015,456:228-234.
【11】张敏, 慕二龙, 许桓瑞,等. 显微组织对0Cr13Ni5Mo不锈钢高周疲劳的影响机制[J].兵器材料科学与工程,2018,41(5):103-107.
【12】谢洪吉,李嘉荣,韩梅.应力比对单晶高温合金高周疲劳行为的影响[J].稀有金属材料与工程, 2018,47(11):3381-3386.
【13】高倩倩, 胡本润, 陈勃, 等.合金钢室、高温高周疲劳性能的研究[J].热加工工艺, 2017, 46(14):93-95.
【14】许天旱,杨宝,王党会,等.应力比对S135钻杆钢腐蚀疲劳行为的影响[J].机械工程材料,2016,40(8):72-75.
【15】许天旱,王荣,冯耀荣,等.应力比对K55套管钻井钢疲劳裂纹扩展性能的影响[J].材料工程, 2015,43(6):79-84.
【16】焦晋峰, 贾朋朋, 刘勇, 等. 临界应力比下M24高强螺栓的常幅疲劳性能试验研究[J].太原理工大学学报, 2019, 50(6):749-755.
【17】许罗鹏, 曹小建, 李久楷, 等. 铝锂合金2198-T8高周疲劳性能及其裂纹萌生机理[J].稀有金属材料与工程, 2017,46(1):83-89.
【18】韦龙, 王时越, 刘国寿, 等.不同应力比下ADB610钢疲劳裂纹扩展速率的试验研究[J].机械强度,2016,38(1):64-68.
【19】何建英, 崔云龙, 张仁航, 等. 301L不锈钢药芯焊丝MAG焊接头高周疲劳性能研究[J].热加工工艺,2018,47(21):226-229.
【20】ELBER W. The significance of fatigue crack closure[M]//Damage Tolerance in Aircraft Structures. PA: ASTM International, 1971.
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