Citation: | JIN Congcong, HUANG Libing, HUANG Wenbin, WANG Dali, MA Yueting, LI Peng, DONG Honggang. Microstructure and mechanical properties of new aluminum alloy MIG welded joint[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2024, 45(7): 74-82. DOI: 10.12073/j.hjxb.20230717001 |
With the development of light weight and fast speed of ships, replacing steel with aluminum has become an inevitable trend of future shipbuilding. A new 10 mm thick aluminum alloy was tested by single-side MIG welding technology, and the effects of two layers and three-pass welding/three layers and four-pass welding on the comprehensive properties of the joint were studied. The results show that the surface and bottom surface of the weld seams have better macroscopic morphology and there are α-Al, Al6(Fe, Mn) and Mg2Si phase. In the heat-affected zone near the fusion line, large equiaxed crystals are formed, and columnar crystals are formed along the direction perpendicular to the fusion line at the edge of the weld. The center of the weld zone is characterized by dendrites, and the grain size of each layer is different, the grain size of the front layer is smaller than that of the back layer. The Fe and Mn elements are segregated in the heat affected zone to form the Al6(Fe, Mn) phase, and Mg tends to precipitate along the weld grain boundary or distributed in the weld microstructure in the form a balanced phase. The average tensile strength of No.1 joint is 294 MPa, reaching 78.4% of the tensile strength of the base material, its elongation is 6.56%; the average tensile strength of No.2 joint is 350 MPa, reaching 93.3% of the tensile strength of the base material, its elongation is 12.3%. The weld zone has the lowest hardness for the joint overall performance, followed by the heat affected zone and the highest in the base metal. For multilayer and multipass welding, the hardness of each layer is related to the welding sequence, and the hardness of the first layer is the highest.
[1] |
陈兴惠, 张洪申. 基于主成分及灰色关联度分析的5083铝合金FSW接头工艺参数优化[J]. 焊接学报, 2023, 44(5): 62 − 69 + 132-133. doi: 10.12073/j.hjxb.20220623001
Chen Xinghui, Zhang Hongshen. Process parameters optimization of 5083 aluminum alloy FSW joint based on principal component analysis and grey correlation analysis[J]. Transactions of the China Welding Institution, 2023, 44(5): 62 − 69 + 132-133. doi: 10.12073/j.hjxb.20220623001
|
[2] |
陈琪昊, 崔山成, 林三宝, 等. 超声频脉冲电信号耦合前后铝合金TIG堆焊接头特点[J]. 焊接学报, 2020, 41(10): 42 − 46 + 99-100.
Chen Qihao, Cui Shancheng, Lin Sanbao, et al. Characteristics of aluminum alloy TIG surfacing joint before and after ultrasonic pulse electrical signal coupling[J]. Transactions of the China Welding Institution, 2020, 41(10): 42 − 46 + 99-100.
|
[3] |
陈澄, 薛松柏, 孙乎浩, 等. 5083铝合金TIG焊接头组织与性能分析[J]. 焊接学报, 2014, 35(01): 37-40 + 114-115.
Chen Cheng, Xue Songbai, Sun Huhao, et al. Microstructure and mechanical properties of 5083 aluminum alloy joint by TIG welding. [J]. Transactions of the China Welding Institution, 2014, 35(01): 37-40 + 114-115.
|
[4] |
Çevilc B, Koç M. The effects of welding speed on the microstructure and mechanical properties of marine-grade aluminium (AA5754) alloy joined using MIG welding[J]. Kovove Materialy, 2019, 57(5): 307 − 316.
|
[5] |
Pu J, Wei Y H, Xiang S Z, et al. Optimization of metal inert-gas welding process for 5052 aluminum alloy by artificial neural network[J]. Russian Journal of Non-Ferrous Metals, 2021, 62(5): 568 − 579. doi: 10.3103/S1067821221050059
|
[6] |
Verma V, Singh A, Pandey A K, et al. Experimental investigation of tensile properties and microstructure of TIG welded dissimilar joints of Al6061/Al5083 Aluminium alloy[J]. Indian Journal of Engineering and Materials Sciences, 2022, 29(2): 262 − 270.
|
[7] |
Vaishnavan SS, Jayakumar K. Performance analysis of TIG welded dissimilar aluminium alloy with scandium added ER5356 filler rods[J]. Journal of the Chinese Institute of Engineers, 2021, 44(7): 718 − 725. doi: 10.1080/02533839.2021.1940298
|
[8] |
Martins M V D, Silveira J L L, D'Almeida J R M. Analysis of the influence of welding parameters on defects and welding characteristics of aluminum-magnesium alloy 5052-H34 in the FSW process[J]. International Journal of Advanced Manufacturing Technology, 2022, 121(9-10): 6137 − 6151. doi: 10.1007/s00170-022-09701-3
|
[9] |
Hao L X, Jia R L, Zhai X W, et al. Effect of friction stir welding parameters on microstructure and properties of welded 5083 aluminium alloy[J]. Journal of Nanoscience and Nanotechnology, 2020, 20(8): 5055 − 5063. doi: 10.1166/jnn.2020.18502
|
[10] |
Chludzinski M, dos Santos R E, Churiaque C, et al. Effect of process parameters on pulsed laser welding of AA5083 alloy using response surface methodology and pulse shape variation[J]. International Journal of Advanced Manufacturing Technology, 2022, 120(7-8): 4635 − 4646. doi: 10.1007/s00170-022-09028-z
|
[11] |
Wang L, Gao M, Zeng X Y. Experiment and prediction of weld morphology for laser oscillating welding of AA6061 aluminium alloy[J]. Science and Technology of Welding and Joining, 2019, 24(4): 334 − 341. doi: 10.1080/13621718.2018.1551853
|
[12] |
祁广斌, 郝晓虎, 董红刚, 等. 6082-T651铝合金板十字接头组织及力学性能[J]. 焊接, 2021(6): 1 − 8 + 61.
Qi Guangbin, Hao Xiaohu, Dong Honggang, et al. Microstructure and mechanical properties of 6082-T651 aluminum alloy cruciform welded joints[J]. Welding & Joining, 2021(6): 1 − 8 + 61.
|
[13] |
李小欣, 薛根奇, 王晓贞, 等. 合金元素对5083铝合金焊接工艺性的影响分析[J]. 热加工工艺, 2019, 48(3): 229 − 231.
Li Xiaoxin, Xue Genqi, Wang Xiaozhen, et al. Effect of alloying elements on welding process of 5083 aluminum alloy[J]. Hot Working Technology, 2019, 48(3): 229 − 231.
|
[14] |
Himarosa R A, Mudjijana, Sudarisman, et al. Effect of MIG welding speed butt-joint on physical and mechanical properties of materials AA5083[J]. Materials Today: proceedings, 2022, 66(5): 3101 − 3106.
|
[15] |
杨得帅. 6061铝合金激光焊接接头组织及力学性能研究[D]. 济南: 山东大学, 2014.
Yang Deshuai. Research on microstructure and mechanical properties of laser welding of 6061 aluminum alloy[D]. Jinan: Shandong University, 2014.
|
[16] |
王家威, 吴巍, 马月婷, 等. 5083铝合金MIG焊接头微观组织与力学性能[J]. 焊接, 2022(11): 20 − 28 + 53.
Wang Jiawei, Wu Wei, Ma Yueting, et al. Microstructure and mechanical properties of 5083 aluminum alloy with MIG welding[J]. Welding & Joining, 2022(11): 20 − 28 + 53.
|
[17] |
Liu Y, Wang W J, Xie J J, et al. Microstructure and mechanical properties of aluminum 5083 weldments by gas tungsten arc and gas metal arc welding[J]. Materials Science and Engineering A, 2012, 549: 7 − 13. doi: 10.1016/j.msea.2012.03.108
|
[18] |
李艳军, 康举, 吴爱萍, 等. TIG焊工艺对LD10铝合金接头气孔的影响[J]. 焊接学报, 2014, 35(4): 37 − 40 + 114-115.
Li Yanjun, Kang Ju, Wu Aiping, et al. Influence of TIG welding parameters on porosity in LD10 aluminum alloy joint[J]. Transactions of the China Welding Institution, 2014, 35(4): 37 − 40 + 114-115.
|
[19] |
Sun J H, Ren W J, Nie P L, et al. Study on the weldability, microstructure and mechanical properties of thick Inconel 617 plate using narrow gap laser welding method[J]. Materials & Design, 2019, 175: 107823.
|
[20] |
Huang B S, Yang J, Lu D H. Study on the microstructure, mechanical properties and corrosion behaviour of S355JR/316L dissimilar welded joint prepared by gas tungsten arc welding multi-pass welding process[J]. Science and Technology of Welding and Joining, 2016, 21(5): 381 − 388. doi: 10.1080/13621718.2015.1122152
|
[1] | CHENG Guangfu, WANG Huiting, JI Shude, FANG Hongyuan. Optimizing of compressive stress region by local treatment technologies on Francis runner[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2012, (8): 97-100. |
[2] | JIANG Wenchun, WANG Bingying, GONG Jianming. Development of welding residual stress during post-welding heat treatment[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2011, (4): 45-48. |
[3] | XU Lianyong, JING Hongyang, ZHOU Chunliang, XU Delu, HAN Yu. Influence of heat treatment on residual stress of P92 steel pipe girth weld[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2010, (3): 13-16. |
[4] | WU Bing, ZHANG Jianxun, GONG Shuili, LIU Chuan. Residual stress distribution of large thickness titanium alloy joints by electron beam welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2010, (2): 10-12. |
[5] | PAN Hua, FANG Hongyuan. Influence of loading of tensile stress on welding residual stress field in plate structure[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2008, (8): 101-104. |
[6] | WANG Zejun, LU Huiping, JING Hongyang. Effect of heated region on stress relief ratio of local heat treatment on spherical tanks[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2008, (3): 125-128. |
[7] | JI Shude, ZHANG Liguo, FANG Hongyuan, LIU Xuesong. Analysis on runner welding residual stress affected by local heating[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2007, (4): 97-100. |
[8] | JI Shude, ZHANG Liguo, FANG Hongyuan, LIU Xue-song. Influence of local heating-cooling on welding residual stress of francis turbine runner[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2007, (2): 71-74. |
[9] | JI Shu-de, ZHANG Li-guo, FANG Hong-yuan, LIU Xue-song. Influence of local peening on welding residual stress of francis turbine runner[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2007, (1): 81-84. |
[10] | WANG Jian-hua, LU Hao, Hidekazu Murakawa. A Direct Assessing Method of Heated Widths During Local PWHT[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2000, (2): 39-42. |