Microstructure, mechanical properties, and corrosion resistance of friction stir welded Mg-Al-Zn alloy thick plate joints

Liu, Fenjun; Li, Jianbo; Yan, Ji; Bai, Yanxia

doi:10.1007/s40194-020-01012-z

Cited by 10 publications

(2 citation statements)

References 42 publications

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“…This joint is very fragile, and the fracture has occurred during the preparation of the metallographic specimen. For thicker FSW joints [102][103][104][105][106], on the one hand, there are brittle IMCs and the LMPEs, which are also two key problems with thin sheets. On the other hand, the upper of the thick Al/Mg joint produces more heat while the bottom of this joint has less heat, which causes the IMCs and LMPEs to appear in the upper while the lower has not form a reliable metallurgical bond.…”

Section: Bms Thicknessmentioning

confidence: 99%

Friction stir welding of aluminium to magnesium: A critical review

Mao

et al. 2022

Materials Science and Technology

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Aluminium/magnesium hybrid structure has been paid increasing attention recently due to its excellent lightweight. However, aluminium/magnesium is easy to form pores, cracks, and massive intermetallic compounds when fusion welding is used. Friction stir welding is as solid-state method, which avoids the above-mentioned problems caused by fusion welding. This article systematically reviews recent progress in friction stir welding of aluminium/magnesium from temperature field, metal flow and weld composition. Moreover, the effects of control parameters on the temperature field, metal flow and weld composition are discussed objectively, respectively. Finally, this work puts forward some problems that need to be solved urgently in the future based on summarising the recent progress of friction stir welding of aluminium/magnesium.

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Section: Bms Thicknessmentioning

confidence: 99%

Friction stir welding of aluminium to magnesium: A critical review

Mao

et al. 2022

Materials Science and Technology

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“…They observed that the corrosion rate is more in both acidic medium and high concentrations of chloride ions, but it is less when spraying time is more. Liu et al [ 22 ] suggested that the size and distribution of precipitates are more influencing factors for corrosion instead of the size of grains in FSWed‐thick AZ31 Mg alloys. Longgang et al [ 23 ] observed that dominating corrosion mode in Zn‐modified Al‐Mg alloy was pitting corrosion, which was changed from the intergranular mode.…”

Section: Introductionmentioning

confidence: 99%

Microstructure, mechanical and corrosion behaviours in friction stir welding of dissimilar magnesium alloys

Singh

Dubey

2023

Materials & Corrosion

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Using magnesium alloys reduce the weight of a vehicle considerably, but the available fusion welding methods impose restrictions on the fabrication of magnesium alloy components. Friction stir welding is an efficient method to weld magnesium alloys, but due to extreme plasticization and stirring of materials, the microstructures are transformed. Similar to other alloys, friction stir welded magnesium alloys are also susceptible to corrosion. In the present work, dissimilar AZ31 and AZ91 Mg alloys were friction stir welded at varying welding conditions. The variable presence of small cracks with a high amount of oxide, and microstructural and textural differences result in varying joint strength, that is, joint efficiency, which has a maximum value of approximately 90% of a stronger base material. The maximum corrosion potential obtained in welded zones is approximately equal to a base material that conveys similar electrochemical behaviour. The minimum corrosion rate of 0.22 mm/year is observed in the sample welded at 700 rpm tool rotational speed, 30 mm/min welding speed and 18 mm shoulder diameter.

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