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材料导报  2025, Vol. 39 Issue (20): 24090131-9    https://doi.org/10.11896/cldb.24090131
  金属与金属基复合材料 |
加载频率对EH36/EH690异种高强钢焊接接头腐蚀疲劳裂纹扩展行为的影响
王梦娜1, 高旭东2,*, 邵永波1, 朱海龙3, 杜栖云4
1 西南石油大学土木工程与测绘学院,成都 610500
2 西南石油大学机电工程学院,成都 610500
3 中国海洋石油集团有限公司,北京100010
4 中国石油天然气股份有限公司西南油气田分公司川西北气矿,四川 绵阳 621700
Effect of Loading Frequency on Corrosion Fatigue Crack Growth Behavior of EH36/EH690 Dissimilar High-strength Steel Welded Joints
WANG Mengna1, GAO Xudong2,*, SHAO Yongbo1, ZHU Hailong3, DU Xiyun4
1 School of Civil Engineering and Geomatics, Southwest Petroleum University, Chengdu 610500, China
2 School of Mechatronic Engineering, Southwest Petroleum University, Chengdu 610500, China
3 China National Offshore Oil Corporation, Beijing 100010, China
4 China National Petroleum Corporation Southwest Oil and Gas Field Branch Northwest Sichuan Gas Mine, Mianyang 621700, Sichuan, China
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摘要 为研究海水全浸环境下加载频率对EH36/EH690异种高强钢焊接接头腐蚀疲劳裂纹扩展行为的影响规律,采用不同的加载频率(f=0.2,0.3,0.5和0.7 Hz)分别对靠近EH36母材的热影响区(HAZ36)材料、靠近EH690母材的热影响区(HAZ690)材料和焊缝区(WM)材料进行腐蚀疲劳裂纹扩展试验,得到了焊接接头不同区域材料的裂纹长度-疲劳寿命曲线和腐蚀疲劳裂纹扩展速率-应力强度因子幅值曲线。结果发现,海水腐蚀环境的存在显著加速了焊接接头的疲劳裂纹扩展速率。相同加载频率作用下,焊接接头不同区域材料在海水腐蚀环境中的腐蚀疲劳裂纹扩展速率(Corrosion fatigue crack growth rate,CFCGR)存在差异,表现为CFCGRHAZ36＞CFCGRWM＞CFCGRHAZ690。不同加载频率作用下,HAZ36、HAZ690和WM三个区域的材料均表现出加载频率越低CFCGR越高,疲劳寿命越短。微观断口分析表明,各工况紧凑拉伸(Compact tension,CT)试件的疲劳断口均为穿晶型准解理断裂。
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王梦娜
高旭东
邵永波
朱海龙
杜栖云
关键词:  异种高强钢焊接接头  腐蚀疲劳裂纹扩展  加载频率  海水全浸  断口形貌    
Abstract: To investigate the effect of loading frequency on the corrosion fatigue crack growth behavior of EH36/EH690 dissimilar high-strength steel welded joints in a fully submerged seawater environment, corrosion fatigue crack growth tests were conducted at different loading frequencies (f=0.2, 0.3, 0.5, and 0.7 Hz) on the heat-affected zone (HAZ36) material near the EH36 base metal, the heat-affected zone (HAZ690) material near the EH690 base metal, and the weld metal (WM). The crack length-fatigue life curves and corrosion fatigue crack growth rate-stress intensity factor range curves were obtained for the materials in different regions of the welded joints. The results indicate that the presence of the seawater corrosion environment significantly accelerates the fatigue crack growth rate of the welded joints. Under the same loading frequency, the corrosion fatigue crack growth rates(CFCGR) vary in different regions of the welded joints in the seawater corrosion environment, with an order from largest to smallest of CFCGRHAZ36＞CFCGRWM＞CFCGRHAZ690. Under different loading frequencies, the materials in the HAZ36, HAZ690, and WM regions all exhibit a trend of higher corrosion fatigue crack growth rates and shorter fatigue life as the frequency decreases. Microscopic fracture surface analysis reveals that the fatigue fracture surfaces of CT specimens under all conditions display transgranular quasi-cleavage fracture characteristics.
Key words:  dissimilar high-strength steel welded joint    corrosion fatigue crack growth    loading frequency    seawater immersion    fracture morphology
发布日期:  2025-10-27
ZTFLH:  TG172.5  
基金资助: 国家自然科学基金(52401343;52078441)
通讯作者:  *高旭东,讲师,西南石油大学机械工程专业博士(博士后),主要从事海洋工程结构抗冲击性能、腐蚀疲劳裂纹扩展行为及机理、高低周疲劳行为、高强钢焊接残余应力及变形预测等方向的研究。gxdgao193@163.com   
作者简介:  王梦娜,2022年9月至今在西南石油大学土木工程与测绘学院攻读硕士学位,在邵永波教授的指导下进行研究。目前主要研究领域为疲劳与断裂。
引用本文:    
王梦娜, 高旭东, 邵永波, 朱海龙, 杜栖云. 加载频率对EH36/EH690异种高强钢焊接接头腐蚀疲劳裂纹扩展行为的影响[J]. 材料导报, 2025, 39(20): 24090131-9.
WANG Mengna, GAO Xudong, SHAO Yongbo, ZHU Hailong, DU Xiyun. Effect of Loading Frequency on Corrosion Fatigue Crack Growth Behavior of EH36/EH690 Dissimilar High-strength Steel Welded Joints. Materials Reports, 2025, 39(20): 24090131-9.
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https://www.mater-rep.com/CN/10.11896/cldb.24090131  或          https://www.mater-rep.com/CN/Y2025/V39/I20/24090131
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