Effect of microstructure and stress ratio on fatigue crack propagation behavior of A7N01 aluminum alloy fiber laser-VPTIG hybrid butt welded

被引：7
作者：
Wu, Shikai [1 ,3 ]
Qiao, Junnan [2 ,3 ]
Zou, Jianglin [3 ]
机构：
[1] Qilu Univ Technol, Laser Inst, Shandong Acad Sci, Jinan 250353, Peoples R China
[2] Tsinghua Univ, Dept Mech Engn, Beijing 100084, Peoples R China
[3] Beijing Univ Technol, Inst Laser Engn, Fac Mat & Mfg, Beijing 100124, Peoples R China
来源：
OPTICS AND LASER TECHNOLOGY | 2023年 / 162卷
基金：
中国国家自然科学基金;
关键词：
Laser-VPTIG hybrid welding; Fatigue crack; Stress ratio; Microstructure; HEAT-TREATMENT; RESIDUAL-STRESS; GROWTH-BEHAVIOR; ELECTRON-BEAM; STRENGTH; RESISTANCE; ARC;
D O I：
10.1016/j.optlastec.2023.109296
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
In this paper, the fatigue crack growth rates of A7N01 aluminum alloy welded joint in weld zone (WZ) and heat affected zone (HAZ) are compared under the stress ratio of 0.1. At the same time, the fatigue crack growth rate of WZ under different stress ratios is studied. The results show that the difference of microstructure leads to different fatigue crack growth rates in different areas of welded joints. The HAZ shows better fatigue crack growth resistance and slower fatigue crack growth rate. However, due to the burning loss of Zn element in the WZ, the precipitation of strengthening phase after solidification in the molten pool is less, and the fatigue crack propagation resistance is weak. After 60 days of natural aging, the number of precipitated phases in the WZ and HAZ increased, and the fatigue crack propagation resistance is improved compared with that in the welded condition. Compared with grain boundary strengthening, precipitation strengthening is more important. With the increase of stress ratio, the fatigue crack closure effect in WZ gradually weakens, and the fatigue crack propagation rate increases.
引用
收藏
页数：7
相关论文
共 29 条
[1]   Recent advances in ageing of 7xxx series aluminum alloys: A physical metallurgy perspective [J].
Azarniya, Abolfazl ;
Taheri, Ali Karimi ;
Taheri, Kourosh Karimi .
JOURNAL OF ALLOYS AND COMPOUNDS, 2019, 781 :945-983
[2]   Influences of pulsed current welding and post weld aging treatment on fatigue crack growth behaviour of AA7075 aluminium alloy joints [J].
Balasubramanian, V. ;
Ravisankar, V. ;
Reddy, G. Madhusudhan .
INTERNATIONAL JOURNAL OF FATIGUE, 2008, 30 (03) :405-416
[3]   Fatigue crack propagation in friction stir welded and parent AA6082 [J].
Ericsson, Mats ;
Sandstrom, Rolf .
STEEL RESEARCH INTERNATIONAL, 2006, 77 (06) :450-455
[4]   Grain size effects on the fatigue response of nanocrystalline metals [J].
Hanlon, T ;
Kwon, YN ;
Suresh, S .
SCRIPTA MATERIALIA, 2003, 49 (07) :675-680
[5]   Influences of post weld heat treatment on fatigue crack growth behavior of TIG welding of 6013 T4 aluminum alloy joint (Part 1. Fatigue crack growth across the weld metal) [J].
Haryadi, Gunawan Dwi ;
Kim, Seon Jin .
JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY, 2011, 25 (09) :2161-2170
[6]   Inhibiting weld cracking in high-strength aluminium alloys [J].
Hu, Yanan ;
Wu, Shengchuan ;
Guo, Yi ;
Shen, Zhao ;
Korsunsky, Alexander M. ;
Yu, Yukuang ;
Zhang, Xu ;
Fu, Yanan ;
Che, Zhigang ;
Xiao, Tiqiao ;
Lozano-Perez, Sergio ;
Yuan, Qingxi ;
Zhong, Xiangli ;
Zeng, Xiaoqin ;
Kang, Guozheng ;
Withers, Philip J. .
NATURE COMMUNICATIONS, 2022, 13 (01)
[7]   Fine equiaxed zone induced softening and failure behavior of 7050 aluminum alloy hybrid laser welds [J].
Hu, Yanan ;
Wu, Shengchuan ;
Shen, Zhao ;
Cao, Huatang ;
Zhong, Xiangli ;
Withers, Philip J. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2021, 821
[8]   Friction-stir welding effects on microstructure and fatigue of aluminum alloy 7050-T7451 [J].
Jata, KV ;
Sankaran, KK ;
Ruschau, JJ .
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2000, 31 (09) :2181-2192
[9]   Microstructure and fatigue crack growth behavior in welding joint of Al-Mg alloy [J].
Jian, Haigen ;
Wang, Yedong ;
Yang, Xiaomei ;
Xiao, Kemou .
ENGINEERING FAILURE ANALYSIS, 2021, 120
[10]   Influence of heat treatment on the strength and fracture toughness of 7N01 aluminum alloy [J].
Li, Bo ;
Wang, Xiaomin ;
Chen, Hui ;
Hu, Jie ;
Huang, Cui ;
Gou, Guoqing .
JOURNAL OF ALLOYS AND COMPOUNDS, 2016, 678 :160-166
123