Startseite Enhancing weld strength in high-strength steels: the role of regional preheating in RSW
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Enhancing weld strength in high-strength steels: the role of regional preheating in RSW

  • Kemal Aydin

    Kemal Aydin was born in Trabzon. He graduated with a doctoral degree in Manufacturing Engineering from Karabuk University. Currently, he is a lecturer at Karadeniz Technical University, where he continues his research in the field of welding.

     ORCID logo EMAIL logo     , Mehtap Hıdıroğlu

    Mehtap Hıdıroğlu was born in Bursa. She graduated with a doctoral degree in Manufacturing Engineering from Karabuk University. Currently, she is employed as a Research and Development Specialist in Advanced Manufacturing Joining Technologies at an automotive company that produces automotive body and chassis parts.

         und Nizamettin Kahraman

    Nizamettin Kahraman was born in Bursa. He is a professor and concurrently serves as the Head of the Department of Manufacturing Engineering at Karabuk University. Her main research areas are welding technology, additive manufacturing and spray coating.
Veröffentlicht/Copyright: 24. Januar 2024
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Abstract

In this study, automotive in sector use STRENX 700 CR and DP 800 steels were joined by resistance spot welding using medium frequency direct current. Some parts were joined under atmospheric conditions, while others were joined by applying regional preheating to their heat-affected zones before welding. The design, manufacturing, and adaptation of the preheating system to the welding machine were carried out as part of this study, considering it as a new system. After the joining process, nondestructive and destructive tests were performed on resistance spot welding connections between STRENX 700 CR and DP 800 steels. Hardness tests revealed that the preheating applied to the heat-affected zones before welding reduced the hardness of the weld metal by approximately 8 %, while the microstructure analysis showed that the regional preheating increased both the weld metal and the heat-affected zones width. The tensile-shear strength increased by about 7 %, and the cross-tension test strength increased by about 5 % with the preheating applied to the heat-affected zones before welding. In both the tensile-shear and cross-tension tests, all failures occurred in the form of button shearing from the heat-affected zones. The regional preheating treated specimens showed the highest fatigue life, with an average of 947,632 cycles.

Keywords: resistance spot welding; MFDC; AHSS; STRENX 700 CR; DP 800; fatigue
Corresponding author: Kemal Aydin, Department of Metallurgical and Materials Engineering, Engineering Faculty, Karadeniz Technical University, Trabzon, Türkiye, E-mail:

Funding source: Karabük University Rectorate and the BAP Coordinator

Award Identifier / Grant number: FDK-2020-2132

About the authors

Kemal Aydin

Kemal Aydin was born in Trabzon. He graduated with a doctoral degree in Manufacturing Engineering from Karabuk University. Currently, he is a lecturer at Karadeniz Technical University, where he continues his research in the field of welding.

Mehtap Hıdıroğlu

Mehtap Hıdıroğlu was born in Bursa. She graduated with a doctoral degree in Manufacturing Engineering from Karabuk University. Currently, she is employed as a Research and Development Specialist in Advanced Manufacturing Joining Technologies at an automotive company that produces automotive body and chassis parts.

Nizamettin Kahraman

Nizamettin Kahraman was born in Bursa. He is a professor and concurrently serves as the Head of the Department of Manufacturing Engineering at Karabuk University. Her main research areas are welding technology, additive manufacturing and spray coating.

  1. Research ethics: Not applicable.

  2. Author contributions: All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by Kemal Aydın, Mehtap Hıdıroğlu and Nizamettin Kahraman. The first draft of the manuscript was written by Kemal Aydın and all authors commented on previous versions of the manuscript. All authors read and approved the Final manuscript.

  3. Competing interests: The authors state no conflict of interest.

  4. Research funding: We would like to thank Karabük University Rectorate and the BAP Coordinator for supporting this study within the scope of the FDK-2020-2132 project.

  5. Data availability: Not applicable.

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Published Online: 2024-01-24
Published in Print: 2024-03-25

© 2024 Walter de Gruyter GmbH, Berlin/Boston

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https://doi.org/10.1515/mt-2023-0241
Schlagwörter für diesen Artikel
resistance spot welding; MFDC; AHSS; STRENX 700 CR; DP 800; fatigue

Artikel in diesem Heft

  1. Frontmatter
  2. Effects of temperature and strain rate on the deformation microstructure and hardness of Al–Zn eutectoid damping alloy
  3. Microstructure and properties of Mn–Si–Cr alloy steel modified by quenching and partitioning
  4. Effect of bonding temperature on microstructure and properties of TLP joined Q355 steel with Cu interlayer
  5. Enhancing weld strength in high-strength steels: the role of regional preheating in RSW
  6. Corrosion cracking resistance of hoisting ropes
  7. Improved tensile properties of Al2O3/Al composite with in-situ generated Al2O3
  8. Effect of welding parameters on cruciform weld joints made of armor steel
  9. Pull-out strength of screws in long bones at different insertion angles: finite element analysis and experimental investigations
  10. Impact performance of unconventional trigger holes
  11. Multi-pass friction hardening treatment of Ti6Al4V alloy toward improved tribological properties
  12. Fe2B layer growth kinetics on ASTM A307 steel evaluated by two diffusion models
  13. Enhanced interface structure of electroformed copper/diamond composites for thermal management applications
  14. Thermal insulation properties of materials for fishing vessel coolboxes
  15. Enhancement of mechanical strength of miter joints in pultruded fiberglass/epoxy composite
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Heruntergeladen am 29.9.2025 von https://www.degruyterbrill.com/document/doi/10.1515/mt-2023-0241/html
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