Formability, microstructure and mechanical properties of nano-treated Al-Zn-Mg-Cu alloy fabricated by wire arc additive manufacturing

TIAN Rui; JIANG Zhe; LIU Jun; LIU Weiqing; CHI Yuanqing; ZHANG Yongkang

doi:10.12073/j.hjxb.20231216001

TRANSACTIONS OF THE CHINA WELDING INSTITUTION > 2024 > 45(8): 110-120. > DOI: 10.12073/j.hjxb.20231216001

TIAN Rui, JIANG Zhe, LIU Jun, LIU Weiqing, CHI Yuanqing, ZHANG Yongkang. Formability, microstructure and mechanical properties of nano-treated Al-Zn-Mg-Cu alloy fabricated by wire arc additive manufacturing[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2024, 45(8): 110-120. DOI: 10.12073/j.hjxb.20231216001

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Formability, microstructure and mechanical properties of nano-treated Al-Zn-Mg-Cu alloy fabricated by wire arc additive manufacturing

TIAN Rui^{1, 3,},
JIANG Zhe²,
LIU Jun^{1, 3},
LIU Weiqing^1, ,,
CHI Yuanqing²,
ZHANG Yongkang²

1.
China-Ukraine Institute of Welding, Guangdong Academy of Sciences, Guangdong Provincial Key Laboratory of Material Joining and Advanced Manufacturing, Guangzhou, 510650, China
2.
School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou, 510006, China
3.
School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing 401331, China

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Received Date: December 15, 2023
Available Online: June 16, 2024

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Abstract

Abstract

Wire arc additive manufacturing(WAAM) was utilized to fabricate the nano-treated Al-Zn-Mg-Cu alloy. Effects of fabrication parameters on WAAM formability are systematically investigated. The results show that the nano-treated Al-Zn-Mg-Cu alloy is well formed by alternative path under the following parameters: welding current 190 A, welding speed 350 mm/min, dwell time 90 s. Post-deposition heat treatment is employed to further modify the microstructure and the mechanical performance. The WAAMed Al-Zn-Mg-Cu alloys at both as-deposited and heat-treated states exhibit homogeneous microstructure composed of fine equiaxed grains without preferred orientation. T6 heat treatment significantly improves the microhardness and mechanical properties of the as-deposited alloy. The microhardness of the T6 treated alloy reaches 178.3 HV, which is 61% higher than that of the as-deposited sample. The ultimate tensile strength, yield strength, elongation of the T6 treated alloy along horizontal and vertical directions are 469.7(±5.1) MPa, 366.3(±1.4) MPa, 6.4 (±0.4) % and 454.3(±18.8) MPa, 364.7(±16.7) MPa, 5.9 (±0.5)% respectively, demonstrating that the WAAMed nano-treated Al-Zn-Mg-Cu alloy has excellent mechanical isotropy.
- wire arc additive manufacturing,
- nano-treating,
- Al-Zn-Mg-Cu alloy,
- formability,
- microstructure and mechanical properties

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References (26)

References

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Formability, microstructure and mechanical properties of nano-treated Al-Zn-Mg-Cu alloy fabricated by wire arc additive manufacturing