Enhanced mechanical properties of Sr-modified Al–Mg–Si alloy by thermo-mechanical treatment

Alper Karakoca; Serdar Osman Yılmaz

doi:10.1515/mt-2024-0264

Article

Enhanced mechanical properties of Sr-modified Al–Mg–Si alloy by thermo-mechanical treatment

Alper Karakoca
Alper Karakoca, born in Manisa in 1990, works in Tekirdag Namik Kemal University, Faculty of Engineering, Department of Mechanical Engineering, Tekirdag, Turkey. He graduated in Mechanical Engineering from Istanbul Technical University, Istanbul, Turkey, in 2013. He received his MSc degrees from Tekirdag Namik Kemal University, Tekirdag, Turkey, in 2017 and his Ph.D from Tekirdag Namik Kemal University, Institute of Science, Mechanical Engineering Department, Tekirdag, in 2024. His research interest’s aluminum cast alloys, Si modification and thermomechanical processes.
and Serdar Osman Yılmaz
Prof. Dr. Serdar Osman Yılmaz, born in Elazig in 1966, works in Tekirdag Namık Kemal University, Faculty of Engineering, Department of Mechanical Engineering, Corlu, Tekirdag, Turkey. He received his BSc from METU University, Ankara, Faculty of Engineering, Metallurgy-Materials Engineering Department in 1989, his MSc from the Institute of Science-Technology, Metallurgy Department in 1992, his Ph.D. from the University of Firat, Institute of Science and Technology, Metallurgy Department, Elazig, in 1998. He studied metal coating techniques, surface modification, welding, casting, wear.

Published/Copyright: December 16, 2024

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From the journal Materials Testing Volume 67 Issue 1

Abstract

In this study, the effect of thermomechanical treatments applied to strontium-modified A360 alloy on the microstructure and mechanical properties of the alloy was investigated. Optical microscopy, XRD, and SEM were employed to examine the microstructural properties, while tensile and hardness tests were conducted on the samples to evaluate the mechanical properties. It was observed that the strength values increased as the deformation amount increased, and subsequently, optimum conditions (tensile strength and ductility) were determined after the subsequent aging treatment. Following cold deformation, dendritic structure shifted towards the direction of deformation along with the eutectic silicon structure. After aging, it was found that the dendritic structure transformed into equiaxed grains at certain temperature. The highest tensile strength of 383 MPa was achieved in the sample with a deformation amount of 70 %. In this case, the ductility value was 2.85 %. Subsequently, the optimum conditions after aging were determined as 160 °C & 4 h, resulting in a tensile strength of 341 MPa and ductility of 3.62 %.

Keywords: A360; thermomechanical treatment; X-ray diffraction; mechanical properties; deformation

Corresponding author: Alper Karakoca, Faculty of Engineering, Department of Mechanical Engineering, 162334 Tekirdag Namik Kemal University , 59000, Çorlu-Tekirdag, Türkiye, E-mail: akarakoca@nku.edu.tr

Funding source: Tekirdag Namik Kemal University Scientific Research Unit

Award Identifier / Grant number: Grant number: NKUBAP.06.DR.21.310.

About the authors

Alper Karakoca

Alper Karakoca, born in Manisa in 1990, works in Tekirdag Namik Kemal University, Faculty of Engineering, Department of Mechanical Engineering, Tekirdag, Turkey. He graduated in Mechanical Engineering from Istanbul Technical University, Istanbul, Turkey, in 2013. He received his MSc degrees from Tekirdag Namik Kemal University, Tekirdag, Turkey, in 2017 and his Ph.D from Tekirdag Namik Kemal University, Institute of Science, Mechanical Engineering Department, Tekirdag, in 2024. His research interest’s aluminum cast alloys, Si modification and thermomechanical processes.

Serdar Osman Yılmaz

Prof. Dr. Serdar Osman Yılmaz, born in Elazig in 1966, works in Tekirdag Namık Kemal University, Faculty of Engineering, Department of Mechanical Engineering, Corlu, Tekirdag, Turkey. He received his BSc from METU University, Ankara, Faculty of Engineering, Metallurgy-Materials Engineering Department in 1989, his MSc from the Institute of Science-Technology, Metallurgy Department in 1992, his Ph.D. from the University of Firat, Institute of Science and Technology, Metallurgy Department, Elazig, in 1998. He studied metal coating techniques, surface modification, welding, casting, wear.

Acknowledgments

The authors would like to thank the Şirvanlı Alüminyum Döküm ve Metal İşleme Sanayi A.Ş. and Turaş Gaz Armatürleri A.Ş. for the casting and processing of the samples.

Research ethics: Not applicable.
Informed consent: Not applicable.
Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Use of Large Language Models, AI and Machine Learning Tools: None declared.
Conflict of interest: No potential conflict of interest was reported by the authors.
Research funding: This study was supported by Tekirdag Namik Kemal University Scientific Research Unit (Grant number: NKUBAP.06.DR.21.310).
Data availability: Not applicable.

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Published Online: 2024-12-16

Published in Print: 2025-01-29

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Articles in the same Issue

https://doi.org/10.1515/mt-2024-0264

Keywords for this article

A360; thermomechanical treatment; X-ray diffraction; mechanical properties; deformation