超声冲击强度对焊接接头疲劳寿命的影响
Effect of ultrasonic impact strength on fatigue life of welded joints
-
摘要: 采用超声冲击处理方法对Q345B钢十字接头进行处理，对比分析了两种振幅下焊接接头疲劳寿命的变化. 结果表明，在25 μm振幅下焊接接头的疲劳寿命相较18 μm振幅下焊接接头的疲劳寿命提高了4.3~7.6倍，从超声冲击处理后的宏观形貌、微观断口、冲击区域表层组织等方面比较分析了不同振幅下超声冲击疲劳延寿差异的原因，并建立有限元模型进行焊接温度场、应力场和超声冲击的数值模拟，将试验结果与有限元计算结果进行综合对比分析. 结果表明，同等冲击条件下振幅越大，压应力层更深，试件表面压应力值更大.Abstract: The fatigue life of Q345B steel cross joint was treated by ultrasonic impact treatment, and the fatigue life of the welded joint under two kinds of amplitudes was compared and analyzed. The results showed that the fatigue life of welded joints at 25 micron amplitude is 4.3~7.6 times higher than that at 18 micron amplitude. The reasons for the difference of ultrasonic impact fatigue life extension under different amplitudes were compared and analyzed in terms of macro-morphology, micro-fracture and surface structure of impact area after ultrasonic impact treatment, and the finite element model was established to simulate the stress field of welding temperature field and stress field. By comprehensively comparing and analyzing the test results with the finite element calculation results, the results showed that the greater the amplitude, the deeper the compressive stress layer and the greater the surface compressive stress of the specimen under the same impact condition.
-
-
[1] Sonsino C M, Muller F, Back J D, et al. Influence of stress relieving by vibration on the fatigue behavior of welded joints in comparison to post-weld heat treatment[J]. Fatigue and Fracture of Engineering Structures, 1996, 19(6):703-708. [2] 饶德林, 陈立功, 倪纯珍, 等. 超声冲击对焊接结构残余应力的影响[J]. 焊接学报, 2005, 26(4):48-50
Rao Delin, Chen Ligong, Nie Chunzhen, et al. Effect of ultrasonic impact treatment on residual stress of welded structure[J]. Transactions of the China Welding Institution, 2005, 26(4):48-50[3] Malaki M, Ding H. A review of ultrasonic peening treatment[J]. Materials and Design, 2015, 87(8):1072-1086. [4] Cheng X, Fisher J W, Prask H J, et al. Residual stress modification by post-weld treatment and its beneficial effect on fatigue strength of welded structures[J]. International Journal of Fatigue, 2003, 25:1259-1269. [5] Yekta R T, Ghahremani K, Walbridge S. Effect of quality control parameter variations on the fatigue performance of ultrasonic impact treated welds[J]. International Journal of Fatigue, 2013, 55:245-256. [6] Gao Y K, Wu X R. Experimental investigation and fatigue life prediction for 7475-T7351 aluminum alloy with and without shot peening-induced residual stresses[J]. Acta Materialia, 2011, 59:3737-3747. [7] He B L, Wei K, Yu Y X, et al. Fatigue life analysis of SMA490BW steel welded butt joint for train bogie based on ABAQUS/FE-SAFE[J]. China Welding, 2016(4):5-12. [8] ⅡW Collection. ⅡW recommendations for the HFMI treatment:for improving the fatigue strength of welded joints:ISSN 2365-4368[S].France:International Institute of Welding, 2016. [9] Epprecht W. Tire track formation on fatigue fracture surfaces; mechanisms and experiments[J]. Scripta Metallurgica, 1982, 16:555-560. [10] Foehrenbach J, Hardenacke V, Farajian M. High frequency mechanical impact treatment (HFMI) for the fatigue improvement numerical and experimental investigations to describe the condition in the surface layer[J]. Welding in the World, 2016, 60:749-755. -
期刊类型引用(4)
1. 孔玲，王玉辉，杨浩坤，彭艳. Fe-Mn-Al-C系奥氏体基低密度钢使役性能研究进展. 机械工程学报. 2024(08): 34-47 . 
百度学术
2. 万亚雄，唐立志，武学俊，章小峰，张朋彦，黄贞益. Fe-Mn-Al-C低密度高强钢焊接技术的研究与进展. 焊接. 2020(08): 45-51+63-64 . 百度学术
3. 宫唤春. 视觉传感技术在大功率光纤激光焊接焊缝宽度特征提取的应用. 激光杂志. 2019(04): 158-160 . 百度学术
4. 邵天巍，薛俊良，万占东，郭伟. QP980-DP980异种先进高强钢激光焊接头微观组织及力学性能. 焊接. 2019(07): 5-9+65 . 百度学术
其他类型引用(2)
计量
- 文章访问数: 346
- HTML全文浏览量: 6
- PDF下载量: 41
- 被引次数: 6
下载:
