FV520B-I在不同介质的疲劳失效分析  

Fatigue failure analysis of FV520B-I in different test media

作　　者：王金龙 高斯博 杨宇星 鲍永杰 彭文杰[3] WANG Jinlong;GAO Sibo;YANG Yuxing;BAO Yongjie;PENG Wenjie(Marine Engineering College,Dalian Maritime University,Dalian 116026,China;Dalian Scientific Test and Control Technology Institute,Dalian 116013,China;Research Institute of Wuhan Iron and Steel(Group)Company,Wuhan 430080,China)

机构地区：[1]大连海事大学轮机工程学院,辽宁大连116026 [2]大连测控技术研究所,辽宁大连116013 [3]武汉钢铁(集团)公司研究院,湖北武汉430080

出　　处：《哈尔滨工程大学学报》2022年第8期1163-1168,共6页Journal of Harbin Engineering University

基　　金：博士后自然自然科学基金项目(2020M670734,2020M680937);兴辽英才计划(XLYC1907196);海底工程技术与装备国际联合研究中心开放基金项目(3132022353).

摘　　要：为了研究FV520B-I在腐蚀环境下的疲劳失效行为与机理,本文在不同介质条件下对FV520B-I做了的疲劳失效分析的工作。利用超声疲劳试验系统对FV520B-I进行空气、水及3.5%NaCl溶液环境下的疲劳试验,使用扫描电镜显微镜对断口表面进行观察,分析不同试验环境、不同寿命范围的断口形貌特征,确定引起失效的损伤形式。根据断口能谱分析结果研究腐蚀介质对FV520B-I疲劳失效行为,分析不同的试验环境对疲劳寿命的影响。结果发现:在小应力幅值条件下,腐蚀介质在疲劳失效过程中起主导作用。应用经典幂函数公式建立超高频率载荷作用下不同环境的FV520B-I的应力-寿命曲线模型。研究内容对FV520B-I零部件维护及失效研究具有积极意义。To study the fatigue failure behavior and mechanism of FV520B-I in a corrosive environment,this paper conducted a fatigue failure analysis of FV520B-I in different test media.The ultrasonic fatigue test system is used to conduct fatigue tests of FV520B-I in air,water,and 3.5%NaCl solution.A scanning electron microscope is employed to observe the fracture surface for the analysis of the fracture morphology characteristics in different test environments and life ranges and for determining the defect forms that cause failure.The effects of corrosion media on the fatigue failure behavior of FV520B-I are studied according to the results of fracture energy spectrum analysis.The influence of different test environments on fatigue life is analyzed based on the test result.Results show that corrosion media play a leading role in the fatigue failure process under a small stress amplitude.The stress-life curve model of FV520B-I in different environments at an ultra-high frequency load is established by using the classical power function formula.The research content has positive significance for FV520B-I parts maintenance and failure research.

关 键 词：FV520B-I 高强度钢 超高周疲劳 腐蚀疲劳 疲劳寿命 失效特征 疲劳试验 NaCl溶液环境 

分 类 号：V263[航空宇航科学与技术—航空宇航制造工程]