The Influence of Heat Treatment on the Microstructure, Surface Roughness and Shear Tensile Strength of AISI 304 Clinch Joints

A.T. Zeuner, L. Ewenz, J. Kalich, S. Schöne, U. Füssel, M. Zimmermann, Metals 12 (2022).

Journal Article | Published | English
Author
Zeuner, André Till; Ewenz, Lars; Kalich, Jan; Schöne, Sebastian; Füssel, Uwe; Zimmermann, Martina
Abstract
Clinching is the manufacturing process of joining two or more metal sheets under high plastic deformation by form and force closure without thermal support and auxiliary parts. Clinch connections are applicable to difficult-to-join hybrid material combinations, such as steel and aluminum. Therefore, this technology is interesting for the application of AISI 304 components, as this material is widely used as a highly formable sheet material. A characteristic feature of AISI 304 is its metastability, i.e., the face-centered cubic (fcc) γ-austenite can transform into a significantly stronger body-centered cubic (bcc) α’-martensite under plastic deformation. This work investigates the effect of heat treatment—a process that involves the formation of an oxidation layer on the sheet surface—on the forming process during joining and the resulting mechanical properties of clinch joints made from AISI 304. For this purpose, different joints made from non-heat treated and heat-treated sheets were examined using classical metallography and advanced SEM techniques, accompanied by further investigations, such as hardness and feritscope measurements. The shear tensile strength was determined, and the fracture behavior of the samples was investigated. Clear influences of heat-treatment-induced surface roughness on the joint geometry and strength were observed.
Publishing Year
Journal Title
Metals
Volume
12
Issue
9
Article Number
1514
ISSN
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Cite this

Zeuner AT, Ewenz L, Kalich J, Schöne S, Füssel U, Zimmermann M. The Influence of Heat Treatment on the Microstructure, Surface Roughness and Shear Tensile Strength of AISI 304 Clinch Joints. Metals. 2022;12(9). doi:10.3390/met12091514
Zeuner, A. T., Ewenz, L., Kalich, J., Schöne, S., Füssel, U., & Zimmermann, M. (2022). The Influence of Heat Treatment on the Microstructure, Surface Roughness and Shear Tensile Strength of AISI 304 Clinch Joints. Metals, 12(9), Article 1514. https://doi.org/10.3390/met12091514
@article{Zeuner_Ewenz_Kalich_Schöne_Füssel_Zimmermann_2022, title={The Influence of Heat Treatment on the Microstructure, Surface Roughness and Shear Tensile Strength of AISI 304 Clinch Joints}, volume={12}, DOI={10.3390/met12091514}, number={91514}, journal={Metals}, publisher={MDPI AG}, author={Zeuner, André Till and Ewenz, Lars and Kalich, Jan and Schöne, Sebastian and Füssel, Uwe and Zimmermann, Martina}, year={2022} }
Zeuner, André Till, Lars Ewenz, Jan Kalich, Sebastian Schöne, Uwe Füssel, and Martina Zimmermann. “The Influence of Heat Treatment on the Microstructure, Surface Roughness and Shear Tensile Strength of AISI 304 Clinch Joints.” Metals 12, no. 9 (2022). https://doi.org/10.3390/met12091514.
A. T. Zeuner, L. Ewenz, J. Kalich, S. Schöne, U. Füssel, and M. Zimmermann, “The Influence of Heat Treatment on the Microstructure, Surface Roughness and Shear Tensile Strength of AISI 304 Clinch Joints,” Metals, vol. 12, no. 9, Art. no. 1514, 2022, doi: 10.3390/met12091514.
Zeuner, André Till, et al. “The Influence of Heat Treatment on the Microstructure, Surface Roughness and Shear Tensile Strength of AISI 304 Clinch Joints.” Metals, vol. 12, no. 9, 1514, MDPI AG, 2022, doi:10.3390/met12091514.
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