Experimental investigation on the effect of microstructure modifiers and heat treatment influence on A356 alloy

Baskaran, J.; Raghuvaran, P.; Ashwin, S.

doi:10.1016/j.matpr.2020.08.719

Cited by 10 publications

(6 citation statements)

References 12 publications

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“…At a microstructural level, for both metal foams can be observed the presence of α-AlFeSi together with β-AlSiFe phase, and even though the presence of phases such as Si and Mg 2 Si remains, they occur in different morphologies. This may be attributed to differences in the cooling rate during the solidification process of the foams, compared to that of raw material (Andoko et al, 2020;Baskaran et al, 2021;Gecu et al, 2018;Kashyap & Chandrasekhar, 2001;Mohamed & Samuel, 2012).…”

Section: Discussionmentioning

confidence: 99%

Microstructural and corrosion study of aluminum foams obtained by space holder process using low-cost removable preforms

Fernández‐Morales¹,

Marulanda-Zapata²,

Vásquez-Rendón³

2021

JART

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The space holder process (SHP) is a useful and common technique to obtain metal foams. However, an important question remains unsolved: Would the quality of the salt affect the properties of the aluminum foam obtained? In this paper, removable preforms of two types of salt (refined and unrefined) were infiltrated with A356 aluminum alloy to obtain metal foams with different pore sizes. The interaction preform-metal was studied from analyzing the morphological structure of the foams, the metal microstructure, and the corrosion resistance of the Al356 alloy. It was observed that, although the two types of salt exhibited some differences, they did not show variations in relation to the porous structure and metal microstructure in the aluminum foams obtained. Additionally, the electrochemical analyses did not show significant effects on the corrosion behavior of aluminum foams caused by the interaction with the salt preforms.

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Section: Discussionmentioning

confidence: 99%

Microstructural and corrosion study of aluminum foams obtained by space holder process using low-cost removable preforms

Fernández‐Morales¹,

Marulanda-Zapata²,

Vásquez-Rendón³

2021

JART

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“…Al-Si alaşımları, genel döküm alaşımlarının yaklaşık olarak %90'ını oluşturmaktadır ve bu alaşım grubunda, genellikle ilk olarak ötektik altı Al-7Si-0.3Mg (A356) alaşımı akla gelmektedir. Alaşıma ilave edilen Mg sayesinde, T6 ısıl işlemi uygulanarak mukavemet değerlerinde etkili bir artış sağlanmaktadır [5][6][7].…”

Section: Giriş *unclassified

Al-7Si-0.3Mg Alaşımının Isıl İşlem Prosesinin Calphad Metodolojisi ile Modellenmesi ve Simülasyonu

AKYILDIZ¹,

SİMSAR

Kutsal

et al. 2022

Kocaeli Üniversitesi Fen Bilimleri Dergisi

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Al-Si-Mg alaşımlarında çökelti sertleşmesi yöntemi ile mukavemet artışı sağlanabilmektedir. Çökelti sertleşmesi prosesinde sıcaklık ve süre önemli bir parametredir. Su verme prosesi sonrasında, aşırı doymuş yapının belirli bir sıcaklıkta belli bir süre tutulması ile denge dışı çökeltiler oluşturularak mukavemet artışı sağlanmaktadır. Bu modelleme ve simülasyon çalışmasında Al-7Si-0.3Mg alaşımının Thermo-Calc yazılımı ile sıcaklığa bağlı faz fraksiyonları analiz edilmiştir. Alaşım içerisindeki fazların kritik dönüşüm sıcaklıkları hesaplanmıştır. Ayrıca TC-Prisma yazılımı ile 180°C’de farklı yaşlandırma süreleri (2, 4, 6 ve 8 saat) ile çökelti boyutu ve mukavemet analizleri yapılmıştır. Böylece alüminyum alaşımlarına sık uygulanan ısıl işlem prosesinin modelleme ve simülasyon çalışmaları ile analizleri yapılarak proses dizaynı konusunda öngörüler ortaya konmuştur. Çalışmanın çıktıları ile Türkçe literatüre katkı sunulması amaçlanmıştır.

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“…Na maioria dos casos, metais puros não possuem elevada resistência mecânica. A combinação de outros elementos químicos, como exemplo o Si metálico, proporciona ganhos expressivos nas propriedades mecânicas devido seu maior limite de resistência à tração (BASKARAN et al, 2021). A liga AlSi é usualmente empregada em muitos setores industriais, como aeroespacial e automobilístico, devido a sua excelente capacidade de ser fundida, baixa massa específica, resistência à corrosão, boas propriedades mecânicas e baixo índice de contração proveniente da solidificação (WAVE, 2020).…”

Section: Objetivos Específicosunclassified

“…Grande parte das ligas em alumínio fundido são aplicadas nos setores automotivo e aeroespacial, pois estas ligas proporcionam fundições de peças de geometrias complexas e paredes finas utilizando-se moldes permanentes (BASKARAN et al, 2021).…”

Section: Fundição De Ligas A356unclassified

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Avaliação da corrosão da liga fundida A356 e análise da microestrutura e propriedades mecânicas antes e após o tratamento térmico T6

Luis

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The A356 alloy, due to its corrosive and mechanical properties, is widely used in the manufacture of wheels within the automotive sector. The present work has two main objectives, namely: -to evaluate the corrosion resistance of the A356 alloy without heat treatment, at room temperature (27±2 o C), in the presence and absence of light and; -to investigate the influence of time and temperature variables applied to the T6 heat treatment on the mechanical properties and microstructural properties of the A356 alloy. The first stage of the work was the removal of specimens (CPs) from the manufactured automotive wheels, these CPs were evaluated for corrosion behavior through the immersion test in saline NaCl environment (3.5%, m/v). Mass loss and surface analysis were the parameters obtained as a function of immersion time (6072 h, ~8 months). In addition, analysis of the corrosive solution was performed for pH variation and visual changes in color and presence of ions. The second step was the T6 heat treatment of the samples taken from the automotive wheel by the solubilization process for 300 min at 540°C. After solubilization, the CPs were immediately immersed in water at 30°C, 60°C and 80°C, using separate containers. Then, aging treatment was carried out at 160°C (140 min), 180°C, 200°C and 220°C (300 min). After T6, the PCs were characterized by X-ray diffractometry (XRD), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), mechanical tensile test (LRT) and Vickers hardness.The corrosive behavior results showed low mass loss, less than 1%, under different light conditions, but with considerable morphological changes during the study time. However, there were no significant changes in the pH and appearance of the NaCl corrosive solution after each PC removal. After T6, the XRD and DSC analyzes do not show changes in behavior caused by the heat treatment. The aging process after quenching at 30°C showed better behavior in relation to mechanical properties (LRT ~240 MPa and 92 HV). By increasing the aging temperature in an attempt to achieve the superaging of the A356 alloy, it was identified that the CPs aged at 220°C for 300 min showed a decrease in LRT (206 MPa and hardness (82 HV), suggesting that they had reached the stage for these conditions. The characterization of the fracture corroborated that the increase in the aging temperature decreased the mechanical properties of the A356 alloy.

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Experimental investigation on the effect of microstructure modifiers and heat treatment influence on A356 alloy

Cited by 10 publications

References 12 publications

Microstructural and corrosion study of aluminum foams obtained by space holder process using low-cost removable preforms

Microstructural and corrosion study of aluminum foams obtained by space holder process using low-cost removable preforms

Al-7Si-0.3Mg Alaşımının Isıl İşlem Prosesinin Calphad Metodolojisi ile Modellenmesi ve Simülasyonu

Avaliação da corrosão da liga fundida A356 e análise da microestrutura e propriedades mecânicas antes e após o tratamento térmico T6

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