Microstructure and properties of friction stir welded joints for 6061-T6/7075-T6 dissimilar aluminum alloy

GAO Shikang; ZHOU Li; ZHANG Xinmeng; ZHANG Junfeng; LI Gaohui; ZHAO Hongyun

doi:10.12073/j.hjxb.20210616003

TRANSACTIONS OF THE CHINA WELDING INSTITUTION > 2022 > 43(6): 35-42. > DOI: 10.12073/j.hjxb.20210616003

GAO Shikang, ZHOU Li, ZHANG Xinmeng, ZHANG Junfeng, LI Gaohui, ZHAO Hongyun. Microstructure and properties of friction stir welded joints for 6061-T6/7075-T6 dissimilar aluminum alloy[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2022, 43(6): 35-42. DOI: 10.12073/j.hjxb.20210616003

Citation:

PDF (7294 KB)

Microstructure and properties of friction stir welded joints for 6061-T6/7075-T6 dissimilar aluminum alloy

GAO Shikang^{1, 2,},
ZHOU Li^{1, 2, ,},
ZHANG Xinmeng³,
ZHANG Junfeng²,
LI Gaohui^{1, 2},
ZHAO Hongyun^{1, 2}

1.
State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, China
2.
Shandong Provincial Key Laboratory of Special Welding Technology, Harbin Institute of Technology at Weihai, Weihai, 264209, China
3.
CRRC Changchun Railway Vehicles Co., Ltd., Changchun, 130062, China

More Information

Received Date: June 15, 2021
Available Online: May 29, 2022

Graphical Abstract

Abstract

Abstract

Friction stir welding technique was applied to 2 mm thick 7075-T6/6061-T6 dissimilar aluminum alloys. The influence of rotating speed and material placement on the joint formation, microstructure and properties were studied. The results indicated that when the 7075-T6 aluminum alloy was placed on the advancing side, it is more conducive to material migration. The plates were joined successfully without welding defects and good surface formation when the welding speed is 150 mm/min and the rotating speed is 1000 r/min. Compared with the base metal, the thermo-mechanically affected zone had an increased content of low-angle boundaries. In the nugget zone, the low-angle boundaries converted to curve high-angle boundaries because of dynamic recrystallization. With the increase of rotating speed, the tensile properties of the joint firstly increased and then decreased. The ultimate tensile strength of the joint reached 231 MPa, and the elongation reached 4.0%. the fracture locations of the joints all located in the nugget zone at the 6061-T6 side, which coincided with the position with the minimum hardness.
- dissimilar aluminum alloys,
- friction stir welding,
- microstructure,
- mechanical property

FullText(HTML)

References (14)

References

李桓, 徐光霈, 张宇辉, 等. 2219/5A06异种铝合金焊接接头组织与性能相关性[J]. 焊接学报, 2020, 41(9): 8 − 15. doi: 10.12073/j.hjxb.20200328001

Li Huan, Xu Guangpei, Zhang Yuhui, et al. Correlation between microstructure and properties of 2219/5A06 dissimilar aluminum alloy welded joint[J]. Transactions of the China Welding Institution, 2020, 41(9): 8 − 15. doi: 10.12073/j.hjxb.20200328001

张津, 计鹏飞, 周俊, 等. 轴肩尺寸对异种铝合金材料搅拌摩擦焊接头显微组织的影响规律[J]. 焊接学报, 2016, 37(11): 51 − 54.

Zhang Jin, Ji Pengfei, Zhou Jun, et al. Effect of shoulder diameter on microstructure of dissimilar Al alloys friction stir welding joint[J]. Transactions of the China Welding Institution, 2016, 37(11): 51 − 54.

郑敏, 申志康, 杨新岐, 等. 异种铝合金回填式搅拌摩擦点焊缺陷及力学性能[J]. 焊接学报, 2016, 37(8): 87 − 90.

Zheng Min, Shen Zhikang, Yang Xinqi, et al. Defects and mechanical properties of refill friction stir spot welded joint of dissimilar aluminum alloys[J]. Transactions of the China Welding Institution, 2016, 37(8): 87 − 90.

Ma Z W, Li Q H, Ma L, et al. Process parameters optimization of friction stir welding of 6005A-T6 aluminum alloy using taguchi technique[J]. Transactions of the Indian Institute of Metals, 2019, 72(7): 1721 − 1731. doi: 10.1007/s12666-019-01639-7

姜贤峰. 2AL2铝合金搅拌摩擦焊研究[J]. 农机使用与维修, 2019(3): 25.

Jiang Xianfeng. Study on friction stir welding of 2AL2 aluminum alloy[J]. Farm Machinery Using & Maintenance, 2019(3): 25.

Doley J K, Kore S D. A study on friction stir welding of dissimilar thin sheets of aluminum alloys AA5052–AA6061[J]. Journal of Manufacturing Science and Engineering-transactions of the Asme, 2016, 138(11): 114502. doi: 10.1115/1.4033691

韩丽娟, 薛根奇, 郭福军, 等. 5083/5052异种铝合金搅拌摩擦焊接头组织及力学性能[J]. 热加工工艺, 2016, 45(11): 236 − 238, 241.

Han Lijuan, Xue Genqi, Guo Fujun, et al. Microstructure and properties of friction stir welding joint of dissimilar 5083 and 5052 aluminum alloy[J]. Hot Working Technology, 2016, 45(11): 236 − 238, 241.

Guo J F, Chen H C, Sun C N, et al. Friction stir welding of dissimilar materials between AA6061 and AA7075 Al alloys effects of process parameters[J]. Materials & Design, 2014, 56(4): 185 − 192.

Yu C, Hua D, Cai Z, et al. Microstructural and mechanical characterization of a dissimilar friction stir-welded AA5083-AA7B04 butt joint[J]. Journal of Intelligent Manufacturing, 2016, 26(2): 1 − 10.

佘思越, 张德芬, 韩金理, 等. 2A12/7075异种铝合金搅拌摩擦焊接头成形及力学性能[J]. 有色金属工程, 2019, 9(5): 17 − 22. doi: 10.3969/j.issn.2095-1744.2019.05.003

She Siyue, Zhang Defen, Han Jinli, et al. Forming and mechanical properties of dissimilar 2A12 and 7075 alloy joint by friction stir welding[J]. Nonferrous Metals, 2019, 9(5): 17 − 22. doi: 10.3969/j.issn.2095-1744.2019.05.003

Xie G M, Ma Z Y, Geng L, et al. Microstructural evolution and mechanical properties of friction stir welded Mg-Zn-Y-Zr alloy[J]. Materials Science and Engineering A, 2007, 471(1-2): 63 − 68.

Cho J H, Boyce D E, Dawson P R. Modeling strain hardening and texture evolution in friction stir welding of stainless steel[J]. Materials Science & Engineering A, 2015, 398(1-2): 146 − 163.

Zhang C, Huang G, Cao Y, et al. On the microstructure and mechanical properties of similar and dissimilar AA7075 and AA2024 friction stir welding joints: Effect of rotational speed[J]. Journal of Manufacturing Processes, 2019, 37: 470 − 487. doi: 10.1016/j.jmapro.2018.12.014

Taghiabadi R, Aria N. Statistical strength analysis of dissimilar AA2024-T6 and AA6061-T6 friction stir welded joints[J]. Journal of Materials Engineering & Performance, 2019, 28: 1822 − 1832.

Cited By

Get Citation

PDF

XML

Article views (463) PDF downloads (83)

Turn off MathJax

Article Contents

Abstract

References

Microstructure and properties of friction stir welded joints for 6061-T6/7075-T6 dissimilar aluminum alloy

Abstract

References

Catalog

Export File

Citation

Format

Content