Influence of Heat Treatment on Mechanical Characteristics of Al7075/Al2O3/TiC Hybrid Metal Matrix Composite

Baba, E Sai; Vinitha, M.; Prasad, D.V.V. Krishna

doi:10.1088/1757-899x/1112/1/012015

“…The two-stage stir casting process is used to cast monolithic and hybrid composites; homogenous distribution is achieved within the matrix because of the effective stirring parameters [30]. As-cast samples are machined for hardness tests, and samples are machined for tensile tests as per ASTM E8 standards [27].…”

Section: Hardness and Ultimate Tensile Strengthmentioning

confidence: 99%

Prediction of age-hardening behaviour of LM4 and its composites using artificial neural networks

Gowrishankar,

Doddapaneni,

Sharma

et al. 2023

Mater. Res. Express

0

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This research work highlights the prediction of hardness behaviour of age-hardened LM4 and its composites fabricated using a two-stage stir casting method with TiB2 and Si3N4. MATLAB - Artificial Neural Networks is used to predict the age-hardening behaviour of LM4 and its composites. Experiments (hardness and tensile tests) are conducted to collect data for training an ANN model as well as to investigate the effect of reinforcements and age-hardening treatment on LM4 and its composites. The results show that with an increment in the reinforcement wt.%, there is an enhancement in hardness and ultimate tensile strength (UTS) values within the monolithic composites. As-cast hybrid composites display a 37 to 54% improvement in hardness compared to as-cast LM4. Heat-treated samples, specifically those treated with peak aging with MSHT and 100°C aging, perform better than as-cast samples and other heat-treated samples in terms of UTS and hardness. Compared to as-cast LM4, MSHT, and 100°C aged samples display an 85 to 202% increment in VHN. Hybrid composites perform better in terms of hardness, while composites with 3 wt.% of TiB2 (L3TB) perform better in terms of UTS, peak aged (MSHT and 100°C aging) L3TB display 68% increment in UTS when compared to as-cast LM4. ANN model is developed and trained with five inputs (wt.% of TiB2, wt.% of Si3N4, type of solutionizing, aging temperature, and aging time) and one output (VHN) using different algorithms and a different number of hidden neurons to predict the age hardening behaviour of composites. Among them, Lavenberg-Marquardt (LM) training algorithm with normalized data and 30 hidden neurons performs well and shows a least average error of 1.588364. The confirmation test confirms that the trained ANN model can predict the output with an average %error of 0.14 using unseen data.

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“…The heat treatment has further enhanced the wear resistance of the composite. The surface morphologies of the wear surfaces indicate that the presence of larger grooves means lower wear resistance [5,23].…”

Section: Worn Surface Morphologymentioning

confidence: 99%

“…Aluminium metal matrix composites (Al-MMCs) have advantages over conventional engineering materials like ferrous materials especially in the reduction of weight which leads to lower moment inertia, less consumption of fuel and better corrosion and wear resistance. Thus, Al-MMC has substituted several conventional materials in engineering spheres, mostly in aerospace, automotive and structural applications [4,5,6].…”

Section: Introductionmentioning

confidence: 99%

Tribological Behaviour of Aluminium-Copper-Cullet Metal Composite

Hussain Nuhu,

Jikan,

Asman

et al. 2023

Preprint

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An Aluminium composite metal, Al-Cu-CP was fabricated from recycled raw materials. The composite was fabricated by means of stir casting method due to its simplicity and economic worth. The composite and the unreinforced Al were both analysed for chemical and mechanical properties. The Al-Cu-CP metal composite produced has shown appreciable level of wear resistance and corrosion resistance in artificial seawater (3.5 g/L NaCl) and allowed to stand for 96 h at room temperature. Different loads were considered for the wear resistance tests, 5 N, 10 N, 15 N and 20 N while 150 rpm, 250 rpm, 350 rpm and 450 rpm were the speeds selected for the adhesive wear resistance test. Improved properties were observed after heat treatment of the Al-Cu-CP metal composite. The heat treated composite was more resistant to corrosion than the untreated composite and it has been confirmed that the corrosion resistance of the materials under study has direct relationship with the immersion period. When the maximum load was applied to the three (3) sets of the samples (unreinforced, treated and treated composites), severe degrees of wear manifested on their various surfaces. Optical images from morphological analysis revealed that wear severity was highest on the surface of the unreinforced matrix, followed by the untreated metal composite and the heat-treated composite was found to be the least affected. Due to these enhanced properties of the Al-Cu-CP metal composite, it could be recommended where high strength with light density product is required such as automobile brake shoes and brake disc as a result of its upgraded mechanical properties.

show abstract

“…The heat treatment has further enhanced the wear resistance of the composite. The surface morphologies of the wear surfaces indicate that the presence of larger grooves means lower wear resistance [5,23].…”

Section: Worn Surface Morphologymentioning

confidence: 99%

“…Aluminium metal matrix composites (Al-MMCs) have advantages over conventional engineering materials like ferrous materials especially in the reduction of weight which leads to lower moment inertia, less consumption of fuel and better corrosion and wear resistance. Thus, Al-MMC has substituted several conventional materials in engineering spheres, mostly in aerospace, automotive and structural applications [4,5,6].…”

Section: Introductionmentioning

confidence: 99%

Tribological Behaviour of Aluminium-Copper-Cullet Metal Composite

Hussain Nuhu,

Jikan,

Asman

et al. 2023

Preprint

0

View full text Add to dashboard Cite

An Aluminium composite metal, Al-Cu-CP was fabricated from recycled raw materials. The composite was fabricated by means of stir casting method due to its simplicity and economic worth. The composite and the unreinforced Al were both analysed for chemical and mechanical properties. The Al-Cu-CP metal composite produced has shown appreciable level of wear resistance and corrosion resistance in artificial seawater (3.5 g/L NaCl) and allowed to stand for 96 h at room temperature. Different loads were considered for the wear resistance tests, 5 N, 10 N, 15 N and 20 N while 150 rpm, 250 rpm, 350 rpm and 450 rpm were the speeds selected for the adhesive wear resistance test. Improved properties were observed after heat treatment of the Al-Cu-CP metal composite. The heat treated composite was more resistant to corrosion than the untreated composite and it has been confirmed that the corrosion resistance of the materials under study has direct relationship with the immersion period. When the maximum load was applied to the three (3) sets of the samples (unreinforced, treated and treated composites), severe degrees of wear manifested on their various surfaces. Optical images from morphological analysis revealed that wear severity was highest on the surface of the unreinforced matrix, followed by the untreated metal composite and the heat-treated composite was found to be the least affected. Due to these enhanced properties of the Al-Cu-CP metal composite, it could be recommended where high strength with light density product is required such as automobile brake shoes and brake disc as a result of its upgraded mechanical properties.

show abstract

Influence of Heat Treatment on Mechanical Characteristics of Al7075/Al2O3/TiC Hybrid Metal Matrix Composite

Cited by 5 publications

References 15 publications

Prediction of age-hardening behaviour of LM4 and its composites using artificial neural networks

Prediction of age-hardening behaviour of LM4 and its composites using artificial neural networks

Tribological Behaviour of Aluminium-Copper-Cullet Metal Composite

Tribological Behaviour of Aluminium-Copper-Cullet Metal Composite

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