Comparison of disc brake pads for truck front wheels based on SAE standard experiments

Polat Topuz; Zekeriya Yaşar Cömert; Ahmet Topuz

doi:10.1515/mt-2024-0511

Article

Comparison of disc brake pads for truck front wheels based on SAE standard experiments

Polat Topuz
Polat Topuz completed his undergraduate education at Marmara University, Technical Education Faculty, Mechanical Education Department, and then he completed his Master and Doctorate education at the same university, at the Department of Metallurgy Education. After working as a “specialist” in the Metallurgical and Materials Engineering Department of Yıldız Technical University between 1999 and 2010, at the end of 2010, he started to work as a faculty member at Istanbul Gedik University. He continues to work as an Associate Professor. His areas of expertise include materials science, materials testing methods, welding, composites, and coating processes.
, Zekeriya Yaşar Cömert
Zekeriya Yaşar Cömert completed his undergraduate education in Yıldız Technical University, Metallurgical and Materials Engineering Department and continues his Doctoral studies. Since 1999, he has been working as a research assistant at the Metallurgical and Materials Engineering Department of Yıldız Technical University. His areas of expertise include destructive tests of materials, heat treating, and coating processes.
and Ahmet Topuz
Ahmet Topuz completed his undergraduate education in Mechanical Engineering at Yıldız University, and his Masters and Doctorate in Mechanical Engineering at the same university. From 1974 to 2016, he retired after serving as the Head of Department, Founding Dean at Yıldız Technical University and then as the Rector of Istanbul Gedik University. He is currently a faculty member at Istanbul Arel University, Department of Mechanical Engineering. His areas of expertise include materials science, composites, heat treating, failure analysis, materials testing methods, and coating technologies.

Published/Copyright: June 11, 2025

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From the journal Materials Testing Volume 67 Issue 8

Abstract

In this study, trials of disc brake pads, which have different compositions and are used in the front brake systems of trucks, were carried out by SAE-J 661 (Brake Lining Quality Test Procedure), SAE-J 866 (Friction Coefficient Identification and Environmental Marking System for Brake Linings), and SAE-J 2975 (Measurement of Copper and Other Elements in Brake Friction Materials) standards. As a result of the experiments, the superiorities or weaknesses of the brake pads relative to each other were evaluated. In the experimental studies, first, EDS (energy dispersive spectroscopy) analyses were carried out with the help of scanning electron microscopy (SEM) and XRF (X-ray fluorescence) analyses to determine the compositions of three different disk brake pads. After the brake pad compositions were determined, friction-wear tests were carried out following the standards. Apart from these, TG (thermogravimetric) analyses, hardness, density, and internal shear strength measurements were carried out.

Keywords: truck; disk brake pad; composition; friction-wear test; TG analysis

Corresponding author: Polat Topuz, Vocational School, İstanbul Gedik University, Istanbul, Türkiye, E-mail: polat.topuz@gedik.edu.tr

About the authors

Polat Topuz

Polat Topuz completed his undergraduate education at Marmara University, Technical Education Faculty, Mechanical Education Department, and then he completed his Master and Doctorate education at the same university, at the Department of Metallurgy Education. After working as a “specialist” in the Metallurgical and Materials Engineering Department of Yıldız Technical University between 1999 and 2010, at the end of 2010, he started to work as a faculty member at Istanbul Gedik University. He continues to work as an Associate Professor. His areas of expertise include materials science, materials testing methods, welding, composites, and coating processes.

Zekeriya Yaşar Cömert

Zekeriya Yaşar Cömert completed his undergraduate education in Yıldız Technical University, Metallurgical and Materials Engineering Department and continues his Doctoral studies. Since 1999, he has been working as a research assistant at the Metallurgical and Materials Engineering Department of Yıldız Technical University. His areas of expertise include destructive tests of materials, heat treating, and coating processes.

Ahmet Topuz

Ahmet Topuz completed his undergraduate education in Mechanical Engineering at Yıldız University, and his Masters and Doctorate in Mechanical Engineering at the same university. From 1974 to 2016, he retired after serving as the Head of Department, Founding Dean at Yıldız Technical University and then as the Rector of Istanbul Gedik University. He is currently a faculty member at Istanbul Arel University, Department of Mechanical Engineering. His areas of expertise include materials science, composites, heat treating, failure analysis, materials testing methods, and coating technologies.

Research ethics: Not applicable.
Informed consent: Not applicable.
Author contributions: The authors have accepted responsibility for the entire content of this manuscript and approved its submission.
Use of Large Language Models, AI and Machine Learning Tools: None declared.
Conflict of interest: The authors state no conflict of interest.
Research funding: None declared.
Data availability: Not applicable.

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Published Online: 2025-06-11

Published in Print: 2025-08-26

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https://doi.org/10.1515/mt-2024-0511

Keywords for this article

truck; disk brake pad; composition; friction-wear test; TG analysis