Optimization of the Corrosion Behavior of AA7075 Al/SiCP and Al/Al2O3 Composites Fabricated by Powder Metallurgy

Balasubramanian, V.; Senthilkumar, J.; Balasubramanian, M.

doi:10.1177/0731684407082629

Cited by 7 publications

(4 citation statements)

References 7 publications

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“…This may be due to that the microstructure of the spray deposited MMC is compact and SiC particles are nonmetallic material, the addition of it minimizes the real corrosion area of the alloy. In another study [62], an attempt has been made to fabricate Al-SiC p and Al-Al 2 O 3 composite materials by powder metallurgy technique at different volume percentage of reinforcement (5,10,15,20, and 25%). The corrosion behavior of the composites was analyzed using AC Gill potentiostat with 3.5 wt% NaCl medium.…”

Section: The Recent Past [Since 2000]mentioning

confidence: 99%

The Stretch, Limit and Path Forward for Particle Reinforced Metal Matrix Composites of 7075 Al-Alloys

Dasgupta¹

2010

ENG

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Al-based metal matrix composites [MMCs] have been the research interest of a wide spectrum of material scientists throughout the world for some over two decades now. The present paper has chosen one alloy system namely the 7xxx series and from an extensive literature review concluded that since the beginning of the new millennium nothing note worthy has been added to the knowledge already gained in the last quarter of the last century except confirm the earlier findings that MMCs if properly fabricated by choosing the processing route and with appropriate size and volume fraction of dispersoids can improve most of the mechanical, corrosion and wear resistant properties of the base alloy. The author's own research activities using this alloy system for making MMCs that include attempts to improve upon the properties by making composites, ageing and also secondary processing have been included. An attempt has been made to establish the stretch to which improvement is possible in the alloy system by making composites and trying all other routes known for meaningful improvement in properties. Further, the way forward for such particulate composites has been drawn to realise the material scientists' dream of seeing such MMCs as engineering components. For this, the areas which now need research include mass production of composites, focus on its machining, joining, processing as also reduction in the size of dispersoids are some of the areas that have been identified and discussed in the paper.

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Section: The Recent Past [Since 2000]mentioning

confidence: 99%

The Stretch, Limit and Path Forward for Particle Reinforced Metal Matrix Composites of 7075 Al-Alloys

Dasgupta¹

2010

ENG

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“…The corrosion rate of each specimen was recorded and the values of corrosion fell between 1.31 and 8.231 mm/year. The modeling and optimization of the specimens were discussed elsewhere [10].…”

Section: Conducting the Experimentsmentioning

confidence: 99%

Effect of Metallurgical Factors on Corrosion Behavior of Al-SiCp Composites Fabricated by Powder Metallurgy

Senthilkumar

Balasubramanian²,

Balasubramanian

2008

Journal of Reinforced Plastics and Composites

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The composites are classified as metal matrix composites, polymer matrix composites, and ceramic matrix composites. Many different matrices have been tried over the years in the MMC formulations but aluminum has been most exploited for compositing due to its low density and ease of fabrication. These composites have received considerable attention as a potential advanced material for application in automobile, aerospace, defense, and general engineering sectors. In this investigation, an attempt has been made to fabricate Al-SiC p composite material by powder metallurgy technique at different volume percentage of reinforcements (5, 10, 15, 20, and 25%). The corrosion behavior of the composite was analyzed using AC Gill potentiostat with 3.5 wt% NaCl medium. Four factors, five levels, and a central composite rotatable design matrix is used to minimize the required number of experiments. The effect of metallurgical factors on the corrosion behavior of the composite was analyzed. The factors include volume percentage of reinforcement, particle size, pH, and reverse potential.

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“…If corrosion potential is more positive, pitting corrosion is initiated in aluminium alloy matrix. Mathematical models can be used for the prediction of accurate results [9]. Abhishek Sharma et al reported that Al6061-SiC-graphite hybrid surface composite has an improved corrosion resistance property due to the decrease of interfacial corrosion.…”

Section: Introductionmentioning

confidence: 99%

An Investigation of corrosion of friction welded and post-weld heat-treated AA6061/SiC/graphite hybrid composites

Senthilkumar

Kumar²,

Balasubramanian³

2021

Acta Polytech

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The aluminium-based hybrid metal matrix composites have noteworthy applications in sub-sea installations, structures of deep-sea crawlers, submarine parts, engine cylinders, drum brakes etc., as they possess high strength, corrosion resistance, chemical, and dimensional stability. In this investigation, the pitting corrosion behaviour of friction welded and post-weld heat-treated AA6061/SiC/graphite hybrid composites were analysed. The corrosion rates of AW (as welded), ST (Solution treated), STA (Solution treated and Aged), and AA (Artificially Aged) weld joints were experimentally determined. The corrosion behaviour has been discussed in light of microstructure. The experimental results revealed that the STA joints exhibited better corrosion resistance characteristics as compared to AW, AA, and ST joints. The corrosion rate was high for AW joints, followed by AA and ST joints, respectively. Taking into account the corrosion rates of AW and STA joints, the STA joints have a corrosion rate 34.6% lesser than that of AW joints. A comparison of AA and ST with STA joints reveals that the rate of corrosion for STA joints was 31.1% lesser than that of AA joints and 28.8% lesser than that of ST joints. A lower corrosion rate was observed for STA joints as compared to AA, AW, and ST joints.

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Optimization of the Corrosion Behavior of AA7075 Al/SiC_P and Al/Al₂O₃ Composites Fabricated by Powder Metallurgy

Cited by 7 publications

References 7 publications

The Stretch, Limit and Path Forward for Particle Reinforced Metal Matrix Composites of 7075 Al-Alloys

The Stretch, Limit and Path Forward for Particle Reinforced Metal Matrix Composites of 7075 Al-Alloys

Effect of Metallurgical Factors on Corrosion Behavior of Al-SiCp Composites Fabricated by Powder Metallurgy

An Investigation of corrosion of friction welded and post-weld heat-treated AA6061/SiC/graphite hybrid composites

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