Microstructural, mechanical and nondestructive characterization of X60 grade steel pipes welded by different processes

Onur Altuntaş; Emre Özer; Demet Zalaoğlu; Mustafa Übeyli

doi:10.1515/mt-2024-0121

Artikel

Microstructural, mechanical and nondestructive characterization of X60 grade steel pipes welded by different processes

Onur Altuntaş
MSc Engineer Onur Altuntaş was born in 1981. He completed his undergraduate education at Zonguldak Karaelmas University Mechanical Engineering Department in 2003 and his Master’s degree at Osmaniye Korkut Ata University Mechanical Engineering Department in 2017. He has been a maintenance engineer at BOTAŞ Petroleum Enterprises Regional Directorate since 2008, repairing pipes, valves, pumps, etc., caused by corrosion and different types of damage. He continues his career in matters related to the maintenance and repair of mechanical systems.
, Emre Özer
Asst. Prof. Dr. Emre Özer, born in 1985, acquired his BSc at Çukurova University in 2009 and his MSc and PhD at Osmaniye Korkut Ata University in Mechanical Engineering in 2015 and 2020. His studies include ballistic, metal matrix composites and nanocomposites, powder metallurgy, heat treatment, microwave sintering, mechanical characterization, wear, welding and continuous casting.
, Demet Zalaoğlu
Asst. Prof. Dr. Demet Zalaoğlu, born in 1987, acquired her BSc at Atatürk University in 2009, her MSc at Selçuk University in 2013 and her PhD at Osmaniye Korkut Ata University in Mechanical Engineering in 2020. Her studies include metal matrix composites, heat treatment, sintering, mechanical characterization, corrosion, welding and continuous casting.
und Mustafa Übeyli
Prof. Dr. Mustafa Übeyli received his BSc at Metallurgical Engineering, Middle East Technical University (1994), M.S. at Mechanical Engineering, Niğde University (1999), PhD at Metallurgical and Materials Engineering, Middle East Technical University (2005). He also completed another PhD on nuclear energy at Mechanical Education, Gazi University (2004). He has been working at Mechanical Engineering, Osmaniye Korkut Ata University since 2010. His main research fields are composite materials, steel technology, powder metallurgy, materials characterization, nuclear reactor analysis and nuclear materials.

Veröffentlicht/Copyright: 9. August 2024

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Abstract

In this paper, the welding quality of API 5L X60 steel pipes was investigated after the application of three different welding scenarios by applying submerged arc welding (SMAW), tungsten inert gas (TIG) and hybrid (TIG + SMAW) welding methods with an average heat input of ca. 1 kJ mm⁻¹ for all passes. For this purpose, the ultrasonic and radiographic tests were done to detect possible discontinuities such as crack and porosity in the welding zones. In addition, the macro and microstructures of weld zones were made to examine different zones in terms of weld quality and phases. Moreover, the hardness, impact toughness and tensile tests were carried out to determine the mechanical properties of the weldments. The tensile strength of the pipe weldments was recorded to be ∼603, 610 and 625 MPa after the welding of pipes by SMAW, TIG + SMAW and TIG welding, respectively. In addition, the impact toughness of the welds was obtained to be 48, 76 and 66 J, for these welding methods, successively. According to the experimental findings, all three welding plans were successfully applied to the steel pipes and found to be suitable regarding the relevant international standards.

Keywords: pipe welding; TIG welding; SMAW welding; nondestructive testing; mechanical properties

Corresponding author: Mustafa Übeyli, Department of Mechanical Engineering, Osmaniye Korkut Ata University, Osmaniye, 80000, Osmaniye, Türkiye, E-mail: mubeyli@gmail.com

About the authors

Onur Altuntaş

MSc Engineer Onur Altuntaş was born in 1981. He completed his undergraduate education at Zonguldak Karaelmas University Mechanical Engineering Department in 2003 and his Master’s degree at Osmaniye Korkut Ata University Mechanical Engineering Department in 2017. He has been a maintenance engineer at BOTAŞ Petroleum Enterprises Regional Directorate since 2008, repairing pipes, valves, pumps, etc., caused by corrosion and different types of damage. He continues his career in matters related to the maintenance and repair of mechanical systems.

Emre Özer

Asst. Prof. Dr. Emre Özer, born in 1985, acquired his BSc at Çukurova University in 2009 and his MSc and PhD at Osmaniye Korkut Ata University in Mechanical Engineering in 2015 and 2020. His studies include ballistic, metal matrix composites and nanocomposites, powder metallurgy, heat treatment, microwave sintering, mechanical characterization, wear, welding and continuous casting.

Demet Zalaoğlu

Asst. Prof. Dr. Demet Zalaoğlu, born in 1987, acquired her BSc at Atatürk University in 2009, her MSc at Selçuk University in 2013 and her PhD at Osmaniye Korkut Ata University in Mechanical Engineering in 2020. Her studies include metal matrix composites, heat treatment, sintering, mechanical characterization, corrosion, welding and continuous casting.

Mustafa Übeyli

Prof. Dr. Mustafa Übeyli received his BSc at Metallurgical Engineering, Middle East Technical University (1994), M.S. at Mechanical Engineering, Niğde University (1999), PhD at Metallurgical and Materials Engineering, Middle East Technical University (2005). He also completed another PhD on nuclear energy at Mechanical Education, Gazi University (2004). He has been working at Mechanical Engineering, Osmaniye Korkut Ata University since 2010. His main research fields are composite materials, steel technology, powder metallurgy, materials characterization, nuclear reactor analysis and nuclear materials.

Research ethics: The paper reflects the authors’ own research and analysis in a truthful and complete manner.
Author contributions: The authors have accepted responsibility for the entire content of this manuscript and approved its submission.
Competing interests: The authors state no conflict of interest.
Research funding: None declared.
Data availability: The raw data can be obtained on request from the corresponding author.

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Published Online: 2024-08-09

Published in Print: 2024-09-25

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Artikel in diesem Heft

https://doi.org/10.1515/mt-2024-0121

Schlagwörter für diesen Artikel

pipe welding; TIG welding; SMAW welding; nondestructive testing; mechanical properties