Impact of Aging Time on the Metallurgical Properties and Hardness Characteristics of an Al-Si-Mg-Cr Hypoeutectic Alloy Intended for Automotive Applications

• Autorzy: Ramalingam V. V. , Shankar K. V. , Shankar B. , Abhinandan R. , Dineshkumar A. , Adhithyan P.A. , Velusamy K. , Kapilan A. , Sudheer N.

Identyfikatory

DOI

10.24425/afe.2024.149281

• Języki publikacji: EN

Abstrakty

EN

This research investigates the microstructural evolution and mechanical properties of LM25 (Al-Si-Mg) alloy and Cr-modified LM25-Cr (Al-Si-Mg-Cr) alloy. Microstructural analysis reveals distinctive ε-Si phase morphologies, with Cr addition refining dendritic structures and reducing secondary dendrite arm spacing in the as-cast condition. Cr modification results in smaller-sized grains and a modified ε-Si phase, enhancing nucleation sites and reducing ε-Si size. Microhardness studies demonstrate significant increases in hardness for both alloys after solutionising and aging treatments. Cr-enriched alloy exhibits superior hardness due to solid solution strengthening, and prolonged aging further influences ε-Si particle size and distribution. The concurrent rise in microhardness, attributed to refined dendritic structures and unique ε-Si morphology, underscores the crucial role of Cr modification in tailoring the mechanical properties of aluminium alloys for specific applications.

Słowa kluczowe

EN

AlSiMg; microstructure; metallurgical properties; hypoeutectic alloy; aging time; hardness

PL

AlSiMg; mikrostruktura; właściwości metalurgiczne; stop podeutektyczny; czas starzenia; twardość

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2024
• Tom: Vol. 24, iss. 2
• Strony: 137--142
• Opis fizyczny: Bibliogr. 27 poz., il., tab., wykr.

Twórcy

autor

Ramalingam V. V.

• Amrita School of Engineering, Amrita Vishwa Vidyapeetham, Coimbatore, India

autor

Shankar K. V.

• Amrita Vishwa Vidyapeetham, Amritapuri, India
• Centre for Flexible Electronics and Advanced Marerials, A V V, Amritapuri, India

• https://orcid.org/0000-0001-6066-4990+

autor

Shankar B.

• Department of Mechanical Engineering, Amrita Vishwa Vidyapeetham, Amritapuri, India
• Centre for Flexible Electronics and Advanced Marerials, A V V, Amritapuri, India

autor

Abhinandan R.

• Department of Mechanical Engineering, Amrita Vishwa Vidyapeetham, Amritapuri, India

autor

Dineshkumar A.

• Department of Mechanical Engineering, Amrita Vishwa Vidyapeetham, Amritapuri, India

autor

Adhithyan P.A.

• Department of Mechanical Engineering, Amrita Vishwa Vidyapeetham, Amritapuri, India

autor

Velusamy K.

• Department of Mechanical Engineering, Amrita Vishwa Vidyapeetham, Amritapuri, India

autor

Kapilan A.

• Department of Mechanical Engineering, Amrita Vishwa Vidyapeetham, Amritapuri, India

autor

Sudheer N.

• Department of Mechanical Engineering, Amrita Vishwa Vidyapeetham, Amritapuri, India

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