Nugget formation, microstructural features and strength of resistance spot welded cold-rolled dual-phase steel lap joints for automotive applications
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Chakkaravarthi Rajarajan
,
Paramasivam Sivaraj
,
Tushar Sonar
,
Selvaraj Raja
Abstract
The main objective of this research paper is to investigate the nugget formation, microstructure and strength performance of DP 800 steel joints developed using resistance spot welding (RSW) process for automotive application. The influence of RSW parameters on nugget formation was studied using one variable at a time approach. The RSW joint showing optimum nugget area was further characterized for microstructural features and strength performance. The microstructural features of nugget were studied using optical and scanning electron microscopy (SEM). The lap tensile shear fractured specimens were analyzed using SEM for optimized condition. The microstructural features were correlated to the tensile shear strength and hardness of RSW joints. Results showed that welding current significantly influences the nugget formation than electrode force and welding time. The DP 800 RSW joints made using a welding current of 5.5 kA, an electrode pressure of 4.0 MPa and a welding time of 2.0 s disclosed defect free weld nugget of 7.28 mm diameter. It showed a higher tensile shear strength of 20 kN and microhardness of 564 HV thereby satisfying the requirement of automotive applications.
Acknowledgement
The authors express sincere gratitude to Director, Centre for Materials Joining and Research, CEMAJOR, Annamalai University, Annamalai Nagar, Tamil Nadu State, India for providing the resistance spot welding facility. The authors are also grateful to the Alagppa University, Karaikudi for providing the material testing facility.
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Author contribution: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
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Research funding: None declared.
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Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
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Artikel in diesem Heft
- Frontmatter
- Effect of heat treatment on the electrical and mechanical properties of a Cu–Ni–Si cast alloy
- Effect of isothermal heat treatments under Ms temperature on the microstructures and mechanical properties of commercial high-silicon spring steel
- Effect of austenitizing temperature on microstructure and properties of a high-speed cobalt steel
- Effect of hot rolling process parameters on the microstructure and mechanical properties of continuously cooled low-carbon high-strength low-alloy (HSLA) steel
- Mechanical and tribological properties of a WC-based HVOF spray coated brake disc
- Microstructure and mechanical properties of AISI 304/DUROSTAT 500 steel double-sided TIG welds
- A Nelder Mead-infused INFO algorithm for optimization of mechanical design problems
- Modeling of hexagonal honeycomb hybrids for variation of Poisson’s ratio
- Effect of elevated test temperature on the tensile strength and failure mechanism of hot-pressed dissimilar joints of laser ablation-treated AA5754-H111 and thermoplastic composite
- Steel shot peening effects on friction stir welded AA2014-T6 aluminum alloys
- Improvement of incremental sheet metal forming with the help of a pressurised fluid system
- Nugget formation, microstructural features and strength of resistance spot welded cold-rolled dual-phase steel lap joints for automotive applications
- African vultures optimization algorithm for optimization of shell and tube heat exchangers
- Effect of welding current on properties of activated gas tungsten arc super duplex stainless steel welds
Artikel in diesem Heft
- Frontmatter
- Effect of heat treatment on the electrical and mechanical properties of a Cu–Ni–Si cast alloy
- Effect of isothermal heat treatments under Ms temperature on the microstructures and mechanical properties of commercial high-silicon spring steel
- Effect of austenitizing temperature on microstructure and properties of a high-speed cobalt steel
- Effect of hot rolling process parameters on the microstructure and mechanical properties of continuously cooled low-carbon high-strength low-alloy (HSLA) steel
- Mechanical and tribological properties of a WC-based HVOF spray coated brake disc
- Microstructure and mechanical properties of AISI 304/DUROSTAT 500 steel double-sided TIG welds
- A Nelder Mead-infused INFO algorithm for optimization of mechanical design problems
- Modeling of hexagonal honeycomb hybrids for variation of Poisson’s ratio
- Effect of elevated test temperature on the tensile strength and failure mechanism of hot-pressed dissimilar joints of laser ablation-treated AA5754-H111 and thermoplastic composite
- Steel shot peening effects on friction stir welded AA2014-T6 aluminum alloys
- Improvement of incremental sheet metal forming with the help of a pressurised fluid system
- Nugget formation, microstructural features and strength of resistance spot welded cold-rolled dual-phase steel lap joints for automotive applications
- African vultures optimization algorithm for optimization of shell and tube heat exchangers
- Effect of welding current on properties of activated gas tungsten arc super duplex stainless steel welds
