Evaluation of corrosion resistance of multipass friction stir processed AZ31 magnesium alloy

Liu, Dejia; Shen, Mingxue; Tang, Yanchuan; Hu, Yong; Zhao, Longzhi

doi:10.1002/maco.201910834

Cited by 7 publications

(2 citation statements)

References 45 publications

(84 reference statements)

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“…As is known, precipitate particles are not the major factor affecting the corrosion resistance of AZ31 Mg alloy. [16,19,20] Postweld plastic deformations produce twin structures, grain refinement, dislocation density, and texture changes, which have an impact on the corrosion resistance of Mg alloys. [41,43] Aung et al [27] found that twins can speed up intragranular corrosion and increase the corrosion rate of AZ31 Mg alloy.…”

Section: Corrosion Behaviorsmentioning

confidence: 99%

“…A recent study found that owing to the further grain refinement in stir zones, multiple passes of friction stir processing (FSP) can reduce the corrosion rate of AZ31 Mg alloy. [ 19 ] However, multiple passes have adverse effects on the corrosion resistance of the ZK60 alloy. [ 20 ] The main reason is attributed to the increase in grain size of the WZ during the subsequent passes of FSP.…”

Section: Introductionmentioning

confidence: 99%

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Corrosion behavior of friction stir‐welded AZ31 Mg alloy after plastic deformation

Liu

Zhang

et al. 2021

Materials & Corrosion

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Postweld plastic deformation was reported to be able to largely enhance the mechanical properties of friction stir‐welded (FSW) Mg alloys by changing microstructures in the regions with a soft‐oriented texture. However, few studies have concentrated on the effects of postweld plastic deformations on the corrosion behavior of FSW Mg alloys, which has an impact on their application. In the present study, electrochemical measurements, hydrogen evolution, and mass loss tests were used to study the influences of postweld compression along the transverse direction and subsequent annealing on the corrosion rate of FSW AZ31 Mg alloys. It was found that owing to the grain refinement in the weld zones, an improvement in the corrosion resistance and hardness was observed in the FSW AZ31 sample compared to the base metal (BM) sample. Postweld compression was very harmful to the corrosion resistance of the FSW AZ31 alloys. On the basis of the mass loss results, the corrosion rate of the compressed FSW sample was ~17.62 mm/year, which was ~8.99 times that of the FSW sample (~1.96 mm/year). Subsequent annealing could slightly reduce the corrosion rate of the compressed FSW AZ31 plates, whereas the corrosion rate of the FSW‐C‐T sample (~13.63 mm/year) was much worse than that of the BM sample (~4.73 mm/year).

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Section: Corrosion Behaviorsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Corrosion behavior of friction stir‐welded AZ31 Mg alloy after plastic deformation

Liu

Zhang

et al. 2021

Materials & Corrosion

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Enhanced corrosion behavior and mechanical properties of AZ91 magnesium alloy developed by ultrasonic‐assisted friction stir processing

Baradarani

Mostafapour

Shalvandi

2019

Materials & Corrosion

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In this study, ultrasonic‐assisted friction stir processing (UaFSP) and friction stir processing (FSP) were conducted on AZ91 magnesium alloy sheets, and their microstructure, corrosion behavior, and mechanical properties were comparatively investigated. Scanning electron microscopy, open‐circuit potential, and potentiodynamic polarization were used to study the corrosion behavior of the material. Electrochemical measurements reveal that employing UaFSP, the corrosion rate of the AZ91 magnesium alloy was significantly reduced where lower corrosion current density for UaFSP specimens was obtained (2.09 µA/cm2) compared with 3.42 µA/cm2 for the FSP and 6.82 µA/cm2 for the base metal. This is mainly attributed to the alteration of morphology and better distribution of the β‐Mg17Al12 phase during UaFSP. By using ultrasonic vibration in FSP, a finer grain structure was obtained, which improved the tensile strength and hardness of the AZ91 Mg alloy.

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A Comprehensive Survey on Friction-Based Processing of AZ Series Magnesium Alloys

Kumar

Arulmurugan

Muthukumaran

et al. 2022

Advances in Processing of Lightweight Metal Alloys and Composites

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Evaluation of corrosion resistance of multipass friction stir processed AZ31 magnesium alloy

Cited by 7 publications

References 45 publications

Corrosion behavior of friction stir‐welded AZ31 Mg alloy after plastic deformation

Corrosion behavior of friction stir‐welded AZ31 Mg alloy after plastic deformation

Enhanced corrosion behavior and mechanical properties of AZ91 magnesium alloy developed by ultrasonic‐assisted friction stir processing

A Comprehensive Survey on Friction-Based Processing of AZ Series Magnesium Alloys

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