Corrosion behaviour of friction stir welded AZ61A magnesium alloy welds immersed in NaCl solutions

Dhanapal, A.; Boopathy, S. Rajendra; Balasubramanian, V.

doi:10.1016/s1003-6326(11)61247-8

Cited by 27 publications

(13 citation statements)

References 20 publications

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“…Many microcracks are observed in the corrosion products (see Figure b). Based on previous studies, corrosion products of Mg alloys might be Mg(OH) 2 . They can form a protective layer deposited on the corrosion surface, and retard the development of corrosion .…”

Section: Resultsmentioning

confidence: 99%

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

Liu

Shen

Tang

et al. 2019

Materials & Corrosion

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Multipass friction stir processing (FSP) is an effective method to produce a homogeneous microstructure and enhance the mechanical properties of magnesium (Mg) alloys. However, few studies have concentrated on the variation of corrosion resistance of Mg alloys during multipass FSP. Electrochemical alternating current (AC) impedance, polarization behavior, hydrogen evolution, and corrosion morphology were used to investigate the effects of subsequent passes on the corrosion resistance of FSP AZ31 plates. A quasi‐in‐situ observation of the growth of corrosion products was carried out to further study the corrosion behaviors of FSP AZ31 alloy. It is found that subsequent passes could further reduce the grain size of FSP AZ31 alloy and result in an increase in the hardness compared with the first pass. Moreover, subsequent passes are beneficial to the improvement in the corrosion resistance of AZ31 alloy. Pitting corrosion occurs in FSP AZ31 plates, which has not changed after subsequent passes.

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Section: Resultsmentioning

confidence: 99%

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

Liu

Shen

Tang

et al. 2019

Materials & Corrosion

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“…Limited Investigations have been carried out on the FSW of Mg alloys under various conditions and process parameters [42][43][44][45][46][47][48][49][50][51][52] and a close review of these investigations reveals us that, majority of these investigations have done w.r.t. AZ31B Mg alloy [42 -46] and limited investigations on joining of AZ61 [47 -49], ZK60 [50,51] etc.…”

Section: Survey Of Literaturementioning

confidence: 99%

Experimental investigation on the improvement of the properties of the AZ80A Mg alloy joints using friction stir welding process

Sevvel¹,

Mahadevan²,

Sateš³

et al. 2019

FME Transactions

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An experimental investigation was conducted with the basic objective of demonstrating the feasibility of joining the AZ80A Mg alloys using the technique of friction stir welding (FSW). Good quality joints free from defects were obtained for 5mm thickness AZ80A Mg alloy flat plates at a speed of rotation of 750 rpm with a traversing speed of 1.5 mm/min, by employing a FSW tool fabricated out of M35 grade High Speed Steel(HSS). It was experimetally observed that, the nugget zone (NZ) of the defect free weldments were found with fine sized, equally spaced & uniformly distributed grains when compared with that of the parent metal. Apart from this, the heat affected zone (HAZ) lying beside the NZ was found to possess larger sized near equaxied grains due to the effect of annealing. The weld zones were found to possess regions of slight softening nature when compared to that of the parent metal, arising from the dislocation of the lower densities. Moreover, the tensile strength of the defect free weldments was found to be around 78% of the parent metal, which seems to better than that of the strengths obtained using conventional joining techniques.

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“…As a result, special care & consideration should be given, while choosing a appropriate process for joining com-ponents composed of AZ80A Mg alloy. Few & unlimited experimental works and investigations have been done on joining of wrought Mg alloys (like AZ31, AZ61, ZK60, AM60 etc) using the FSW process [42][43][44][45][46][47][48][49][50][51].…”

Section: Literature Reviewmentioning

confidence: 99%

“…It was found during the investigation that the post-weld compression has increased the precipitates number in the fabricated ZK60 Mg alloy joints during the consequent aging. Another researcher Dhanapal et al [49] investigated the corrosion performance of the wrought AZ61A Mg alloy joints fabricated using the technique of FSW. The corrosion performance of the fabricated joints was validated by immersing the joints in solutions of NaCl with different values of pH, different concentrations of chloride ion & at various time intervals of immersion.…”

Section: Literature Reviewmentioning

confidence: 99%

Experimental study on the role of tool geometry in determining the strength & soundness of wrought Az80a Mg alloy joints during FSW process

Thangaiah¹,

Sevvel²,

Satheesh³

et al. 2018

FME Transactions

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An investigation was conducted to find out the influencing role of the geometry of the FSW tool on the tensile strength, corrosion resistance, wear rate of the wrought AZ80A Mg alloy joints during the FSW process. FSW tools with two uniquely different geometries, namely stepped cylindrical shoulder tool and stepless cylindrical shoulder tool were employed at different combinations of speeds of rotation and traversing speed. Comprehensive observations & investigations were also carried out regarding the tensile strength, wear losses & corrosion resistance of the fabricated joints. The joints fabricated using stepped cylindrical shoulder tool exhibited appreciable tensile strength values at combinations of higher traversing feeds and low values of rotational speeds of the FSW tool. At the same time, the joints possessing fine sized refined grains in their nugget zone have been found to exhibit higher wear losses.

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Corrosion behaviour of friction stir welded AZ61A magnesium alloy welds immersed in NaCl solutions

Cited by 27 publications

References 20 publications

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

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

Experimental investigation on the improvement of the properties of the AZ80A Mg alloy joints using friction stir welding process

Experimental study on the role of tool geometry in determining the strength & soundness of wrought Az80a Mg alloy joints during FSW process

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