Investigating the Effect of Electrode Pressure on Nugget Size, Microstructure and Tensile Shear Strength of Resistance Spot Welded Advanced High Strength Dual Phase Steel Joints

The main objective of this investigation is to study the effect of electrode pressure on nugget formation, microstructural features and tensile shear strength (TSS) properties of resistance spot welded advanced high strength steel lap joints. The tensile shear strength (TSS) properties were evaluate...

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Veröffentlicht in:Metallography, microstructure, and analysis microstructure, and analysis, 2022-06, Vol.11 (3), p.472-483
Hauptverfasser: Rajarajan, Chakkaravarthi, Sonar, Tushar, Sivaraj, Paramasivam, Raja, Selvaraj, Mathiazhagan, Nallusamy
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container_issue 3
container_start_page 472
container_title Metallography, microstructure, and analysis
container_volume 11
creator Rajarajan, Chakkaravarthi
Sonar, Tushar
Sivaraj, Paramasivam
Raja, Selvaraj
Mathiazhagan, Nallusamy
description The main objective of this investigation is to study the effect of electrode pressure on nugget formation, microstructural features and tensile shear strength (TSS) properties of resistance spot welded advanced high strength steel lap joints. The tensile shear strength (TSS) properties were evaluated in straight lap (SL-TSS) and cross lap (CL-TSS) joint configuration. Results showed that TSS of joints increases with increase in electrode pressure up to 4.0 MPa. Further increase results in drastic reduction in TSS of spot joints. The DP-800 steel spot joints developed using the electrode pressure of 4.0 MPa exhibited superior SL-TSS of 830 MPa and CL-TSS of 684 MPa extending straight lap and cross lap joint efficiency upto 99.71 and 82.17%. It is attributed to the evolution of finer needle like martensitic structure in nugget zone.
doi_str_mv 10.1007/s13632-022-00862-x
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subjects Characterization and Evaluation of Materials
Chemistry and Materials Science
Dual phase steels
Electrodes
High strength steels
Lap joints
Materials Science
Metallic Materials
Microstructure
Nanotechnology
Peer-Reviewed Paper
Pressure effects
Resistance spot welding
Shear strength
Structural Materials
Surfaces and Interfaces
Thin Films
title Investigating the Effect of Electrode Pressure on Nugget Size, Microstructure and Tensile Shear Strength of Resistance Spot Welded Advanced High Strength Dual Phase Steel Joints
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