Mechanical and Corrosion Behavior of Al7075 (Hybrid) Metal Matrix Composites by Two Step Stir Casting Process

Aluminum metallic composites (AMCs) have been recognized as promising material exhibiting excellent functional and structural properties that can be significantly tailored to meet the industrial demands as well as to meet the design criteria for many applications such as aerospace, automobiles, marine, defense, and so on. Herein, an effort is made to provide an extensive overview of the various processing techniques adopted for the development of AMCs. Various processing kinetics of stir casting technique are elaborated comprehensively in terms of existing challenges, conceivable modifications incorporated in it. Considering the critical assessment on mechanical properties made through various kinds of literature, an electromagnetic stir-squeeze casting synergically equipped with ultrasonic transducing probe and bottom pouring attachments is recommended as the most appropriate processing technique for the development of AMCs. Moreover, appropriate recommendations regarding process variables and additives/modifiers, and potential future research opportunities are also addressed significantly to encourage the ongoing and upcoming researchers, which lead this critical Review toward novelty and uniqueness.

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“…Enhanced two way stir casting. [219] Figure 25. Synergetic stir-squeeze casting with bottom pouring.…”

Section: Furnace Designmentioning

confidence: 99%

A Critical Review on Synthesis of Aluminum Metallic Composites through Stir Casting: Challenges and Opportunities

2020

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“…Sambathkumar et al 17 fabricated an Al7075+SiC+ TiC composite to investigate the mechanical and corrosion characteristics. An increase in the reinforcements up to 15 % by volume increased the microhardness.…”

Section: Attemptedmentioning

confidence: 99%

Study of the microstructures and mechanical properties of aluminium hybrid composites with SiC and Al2O3

Pugalenthi¹,

Jayaraman²,

Subburam³

2019

Mater. Tehnol.

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Aluminium metal-matrix composites are widely produced with different ceramic compounds as reinforcements to enhance their properties and to suit various structural applications. The present work involves the fabrication of Al7075 composites with silicon carbide (SiC) and aluminum oxide (Al2O3) as reinforcements through stir casting. Four specimens were produced with different compositions comprising SiC (3, 5, 7 and 9 w/%) and Al2O3 2 w/% in all the combinations. Mechanical properties like ultimate tensile strength (UTS), yield strength (YS), percentage of elongation (% of elongation) and hardness (VHN) were examined, along with fractography studies. The microstructural characterization of the composites was also studied through micrographs obtained from the scanning electron microscope (SEM). The test results revealed that the increase in the w/% fractions of the reinforcement materials caused an increase in the tensile strength, yield strength and hardness of the aluminium composite, except for the % of elongation, which is reduced with the addition of ceramic particles.Kompoziti s kovinsko osnovo iz aluminija se pogosto izdelujejo z razli~nimi kerami~nimi spojinami kot oja~itveno fazo, in s tem postanejo uporabni za izdelavo razli~nih strukturnih aplikacij. V pri~ujo~i raziskavi so avtorji izdelali kompozite na osnovi Al zlitine 7075 z dodatkom delcev silicijevega karbida (SiC) in aluminijevega oksida (Al2O3) kot oja~itveno fazo med preme{avanjem taline. Izdelali so {tiri vzorce z razli~no vsebnostjo SiC (3, 5, 7 in 9 w/%) in v vseh primerih {e z dodatkom 2 w/% Al2O3. Dolo~ili so mehanske lastnosti izdelanih kompozitov -natezno trdnost pri pretrgu (UTS), mejo plasti~nosti (YS), raztezek (%) in trdoto (VHN). Nato so izvedli {e analize prelomov (fraktografijo) nateznih preizku{ancev s pomo~jo vrsti~nega elektronskega mikroskopa (SEM). Rezultati preiskav so pokazali, da pove~anje dodatka oja~itvene faze v obliki kerami~nih delcev povzro~i zvi{anje natezne trdnosti, meje plasti~nosti in trdote, zmanj{a pa se raztezek. Klju~ne besede: metoda litja s preme{avanjem, hibridni kompoziti, mehanske lastnosti in mikrostruktura

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“…In recent decades, metal matrix composites (MMCs) are used to replace the emergent stipulate for light density with high performance materials in advanced manufacturing industries [1]. Among the MMCs, aluminium matrix composites (AMCs) are widely used as an attractive option for aviation, transportation, sports industries and defence applications owing to their favourable characteristics such as high strength-to-weight ratio, high specific modulus, good wear and corrosion resistance and low thermal expansion coefficient [2]. The aluminium and its alloys exhibit very poor tribological properties.…”

Section: Introductionmentioning

confidence: 99%

Parametric studies on dry sliding wear behaviour of Al-7075 alloy matrix composite using S/N ratio and ANOVA analysis

Alagarsamy¹,

Ravichandran²

2020

Mater. Res. Express

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Al7075/10 wt% TiO 2 alloy composite has been fabricated by the stir casting method to investigate the influence of wear parameters. The microstructure of the produced composite was analyzed by scanning electronic microscopy. A pin-on-disc rig was used to carry out the wear test on produced composite under dry sliding conditions. The three wear control parameters such as load, sliding velocity and sliding distance were chosen to study the effects on the wear rate and coefficient of friction of composite. The experiments were planned as per L9 orthogonal array based on Taguchi's design of experiments. The signal-to-noise ratio and analysis of variance techniques were employed to determine the optimum combination of parameters and the significant contribution of each parameter on the responses. The results exposed that the load was the most predominant factor affecting the wear rate and coefficient of friction followed by the sliding distance and sliding velocity. Finally, the regression equations were developed to predict the responses. The worn surface morphology of composite noticed that TiO 2 reinforcement protects the matrix alloy from removal of material at all conditions. This investigation revealed that the wear resistance of the Al7075 alloy can be enhanced by the incorporation of TiO 2 particles.

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Mechanical and Corrosion Behavior of Al7075 (Hybrid) Metal Matrix Composites by Two Step Stir Casting Process

Cited by 102 publications

References 25 publications

A Critical Review on Synthesis of Aluminum Metallic Composites through Stir Casting: Challenges and Opportunities

A Critical Review on Synthesis of Aluminum Metallic Composites through Stir Casting: Challenges and Opportunities

Study of the microstructures and mechanical properties of aluminium hybrid composites with SiC and Al2O3

Parametric studies on dry sliding wear behaviour of Al-7075 alloy matrix composite using S/N ratio and ANOVA analysis

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