Correlation between microstructure and properties of 2219/5A06 dissimilar aluminum alloy welded joint

被引：0
|
作者：
Li H. [1 ]
Xu G. [1 ]
Zhang Y. [1 ]
Wu S. [1 ]
Wang F. [2 ]
机构：
[1] Tianjin Key Laboratory of Advanced Joining Technology, Tianjin University, Tianjin
[2] Shanghai University of Engineering Science, School of Materials Engineering, Shanghai
来源：
Hanjie Xuebao/Transactions of the China Welding Institution | 2020年 / 41卷 / 09期
关键词：
Dissimilar aluminum alloy; Mechanical properties; Microstructure; Plused VP-TIG welding;
D O I：
10.12073/j.hjxb.20200328001
中图分类号：
学科分类号：
摘要：
Two different aluminum alloys of 2219-T87 and 5A06-H112 with thickness of 5.5 mm were jointed using plused VP-TIG butt welding. The microstructure and mechanical properties of the joint was investigated. The results show that the microstructure in heat-affected zone on the 5A06 side is equiaxed crystal, the strip structure in the heat-affected zone on the 2219 side is getting coarser, and the welding seam is composed of equiaxed crystal. The fine equiaxed crystal band and porosity defects near the fusion line on the 2219 side, and the low angle grain boundary near the fusion line on the 2219 side is less than that near the fusion line on the 5A06 side, which lead to the failure of the fusion line on the 2219 side during the tensile texts. During the tensile texts, the fracture of the specimen occurred along the maximum strain near the fusion line of 2219 side. The tensile strength of the joint reached 63.6% and 75.3% of the base material of 2219 and 5A06, and the elongation reached 30.5% and 29.8% of the base material of 2219 and 5A06, respectively. Copyright © 2020 Transactions of the China Welding Institution. All rights reserved.
引用
收藏
页码：8 / 15
页数：7
相关论文
共 12 条
  • [1] Sun Zhuanping, Yang Xinqi, Liu Kaixuan, Et al., Study of technology and structure property on friction plug welding of dissimilar aluminum alloy, Transactions of the China Welding Institution, 40, 9, pp. 145-150, (2019)
  • [2] Yang Jiajia, Wang Kehong, Cao Hui, Et al., Microstructure and mechanical properties of thick 5A06 aluminum alloy weld joint in tandem PMIG welding, Transactions of the China Welding Institution, 36, 6, pp. 23-26, (2015)
  • [3] Li Rui, Research on welding technology of 2A14/5A06 dissimilar material, (2015)
  • [4] Zhu Z Y, Deng C Y, Wang Y, Et al., Effect of post weld heat treatment on the microstructure and corrosion behavior of AA2219 aluminum alloy joints welded by variable polarity tungsten inert gas welding, Materials & Design (1980-2015), 65, pp. 1075-1082, (2015)
  • [5] Zhang Jing, Feng Xiaosong, Xu Hui, Et al., Mechanical properties and microstructures of laser coaxially assisted friction stir welded 2219-T6 aluminum, Transactions of the China Welding Institution, 39, 8, pp. 82-86, (2018)
  • [6] Srinivasan P B, Arora K S, Dietzel W, Et al., Characterisation of microstructure, mechanical properties and corrosion behaviour of an AA2219 friction stir weldment, Journal of Alloys and Compounds, 492, 1-2, pp. 631-637, (2010)
  • [7] Wang Hanping, Yang Xiaoyi, Chen Hui, Et al., Micro-area organization and performance of 130 mm Al alloy scanning laser filler wire welded joint, Transactions of the China Welding Institution, 40, 11, pp. 87-92, (2019)
  • [8] Guo N, Fu Y, Wang Y, Et al., Microstructure and mechanical properties in friction stir welded 5A06 aluminum alloy thick plate, Materials & Design, 113, pp. 273-283, (2017)
  • [9] Yuan Huating, Xu Yanli, Li Rui, Et al., Study on welding technique for dissimilar aluminum alloys of 2A14/5A06, Aerospace Manufacturing Technology, 1, pp. 23-25, (2015)
  • [10] Wang W, Cao Z, Liu K, Et al., Fabrication and mechanical properties of tungsten inert gas welding ring welded joint of 7A05-T6/5A06-O dissimilar aluminum alloy, Materials, 11, 7, (2018)
12