Performance Analysis of Friction Stir Welded Lightweight Aluminum Alloy Sheet

Friction stir spot welding (FSSW) was applied to lap joining of aluminum alloy sheets and steel sheets. A 1.2 mm-thick non-plated carbon steel sheet and plated steel sheets with zinc alloy (ZAM), pure zinc (GI), zinc alloy including Fe (GA) and Al-Si alloy (AS) were prepared. The melting temperature of the plated layer is 330, 420, 880 and 640°C, respectively. A 1.1 mm-thick 6022 aluminum alloy sheet was overlapped on the steel sheet. A rotating tool was inserted from the aluminum alloy sheet side and the probe tip was kept at the position of 0.2 mm above the lapped interface for 3 seconds. For ZAM and GI, original plated layers were removed from the interface and intermediate layers were formed at the joint interface. This is because the melting temperature of the plated layer was lower than the interface temperature under the rotating probe tip during the FSSW. In contrast to that, the partial original plated layer remained after welding, and additional layer formed at the plated layer /aluminum alloy interface for GA. For AS, Al-Fe intermetallic compound layer, which was formed at the original Al-Si alloy plated steel surface remained.

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Superplastic forming of 5083 aluminum alloy sheet joined using friction stir welding

Journal of Japan Institute of Light Metals ◽

10.2464/jilm.54.143 ◽

2004 ◽

Vol 54 (4) ◽

pp. 143-147 ◽

Cited By ~ 2

Author(s):

Nobuyuki SUZUKI ◽

Toru JINISHI

Keyword(s):

Aluminum Alloy ◽

Friction Stir Welding ◽

Superplastic Forming ◽

Alloy Sheet ◽

Aluminum Alloy Sheet ◽

Friction Stir ◽

5083 Aluminum Alloy

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Microstructure and Mechanical Properties of TIG and Friction Stir Welded Joints of Sc-contained High Strength Aluminum Alloy Sheet

Journal of Mechanical Engineering ◽

10.3901/jme.2020.06.221 ◽

2020 ◽

Vol 56 (6) ◽

pp. 221

Author(s):

YANG Chao ◽

WANG Yingjun ◽

XU Yanli ◽

CAI Jing ◽

YU Baohai ◽

...

Keyword(s):

Mechanical Properties ◽

Aluminum Alloy ◽

Welded Joints ◽

High Strength ◽

Alloy Sheet ◽

Aluminum Alloy Sheet ◽

Friction Stir ◽

High Strength Aluminum Alloy ◽

Microstructure And Mechanical Properties

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Improvement of Microstructure and Mechanical Properties of 7050-T7451 Aluminum by a Novel Double-Sided Friction Stir Processing

Materials Science Forum ◽

10.4028/www.scientific.net/msf.838-839.385 ◽

2016 ◽

Vol 838-839 ◽

pp. 385-391

Author(s):

Wen Jing Yang ◽

Ji Zhong Li ◽

Xue Wen ◽

Hua Ding

Keyword(s):

Mechanical Properties ◽

Aluminum Alloy ◽

Friction Stir Processing ◽

Surface Friction ◽

Alloy Sheet ◽

Bottom Surface ◽

Aluminum Alloy Sheet ◽

Friction Stir ◽

Average Grain Size ◽

Double Surface

Recently, friction stir processing (FSP), as an effective tool, has been employed to modify microstructures and mechanical properties of metal sheet. A novel technique of double surface friction stir processing (FSP) was proposed in this study. A 7050-T7451 aluminum alloy sheet of 6.5mm in thickness was processed by FSP with 30% overlap in each side. The position deviation of the stir pin from the upper surface to the bottom surface is 35%. Significant grain refinement with an average grain size of 2.5μm from the as-received 50μm, can be obtained after double-sided FSP. In comparison with the conventional FSP, no HAZ (heat affected zone) or TMAZ (thermal mechanical affected zone) was formed between the adjacent stir zones of the aluminum alloy sheet. At a strain rate of 10-3 s-1, a maximum elongation of 29.8% and 327% in transverse direction of FSP passes have been achieved at room temperature and 400°C, respectively.

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