Mechanical and Microstructural Characterization of Class 800 Complex Phase Steel before and after the Laser Welding Process

Neto, Antonio dos Reis de Faria; Dias, Erica Ximenes; Fukugauchi, Cristina Sayuri; Martins, Marcelo Sampaio; Pereira, Marcelo dos Santos

doi:10.3390/jmmp8050232

Open AccessArticle

Mechanical and Microstructural Characterization of Class 800 Complex Phase Steel before and after the Laser Welding Process

by

Antonio dos Reis de Faria Neto

^1,*

,

Erica Ximenes Dias

¹,

Cristina Sayuri Fukugauchi

²,

Marcelo Sampaio Martins

¹ and

Marcelo dos Santos Pereira

³

¹

Department of Mechanical Engineering, School of Engineering and Sciences, São Paulo State University (UNESP), Guaratinguetá 12516-410, Brazil

²

Federal Institute of São Paulo (IFSP), São José dos Campos 12223-201, Brazil

³

Department of Materials and Technology, School of Engineering and Sciences, São Paulo State University (UNESP), Guaratinguetá 12516-410, Brazil

^*

Author to whom correspondence should be addressed.

J. Manuf. Mater. Process. 2024, 8(5), 232; https://doi.org/10.3390/jmmp8050232

Submission received: 5 August 2024 / Revised: 18 September 2024 / Accepted: 23 September 2024 / Published: 15 October 2024

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Abstract

Complex phase steels, known for their high levels of conformability, energy absorption, and deformation capacity, are among the more advanced high-strength steels. The objective of this study was to compare the mechanical properties of CPW 800-class complex phase steels, with and without laser welding. The analysis involved determining tensile strength, yield strength, elongation, and area reduction through tensile tests, in scenarios both with and without laser welding. Additionally, the number of cycles was assessed via fatigue tests, and absorbed energy was measured using impact tests. The non-parametric Kruskal–Wallis test, at a 5% significance level, revealed that tensile strength, yield strength, area reduction, and absorbed energy were statistically similar regardless of laser welding. However, elongation and the number of cycles showed significant differences. The fractured surface from axial fatigue tests exhibited ductile characteristics, with the additional presence of dimples or alveoli.

Keywords: complex phase steel; laser welding; mechanical properties; non-parametric test

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MDPI and ACS Style

Neto, A.d.R.d.F.; Dias, E.X.; Fukugauchi, C.S.; Martins, M.S.; Pereira, M.d.S. Mechanical and Microstructural Characterization of Class 800 Complex Phase Steel before and after the Laser Welding Process. J. Manuf. Mater. Process. 2024, 8, 232. https://doi.org/10.3390/jmmp8050232

AMA Style

Neto AdRdF, Dias EX, Fukugauchi CS, Martins MS, Pereira MdS. Mechanical and Microstructural Characterization of Class 800 Complex Phase Steel before and after the Laser Welding Process. Journal of Manufacturing and Materials Processing. 2024; 8(5):232. https://doi.org/10.3390/jmmp8050232

Chicago/Turabian Style

Neto, Antonio dos Reis de Faria, Erica Ximenes Dias, Cristina Sayuri Fukugauchi, Marcelo Sampaio Martins, and Marcelo dos Santos Pereira. 2024. "Mechanical and Microstructural Characterization of Class 800 Complex Phase Steel before and after the Laser Welding Process" Journal of Manufacturing and Materials Processing 8, no. 5: 232. https://doi.org/10.3390/jmmp8050232

APA Style

Neto, A. d. R. d. F., Dias, E. X., Fukugauchi, C. S., Martins, M. S., & Pereira, M. d. S. (2024). Mechanical and Microstructural Characterization of Class 800 Complex Phase Steel before and after the Laser Welding Process. Journal of Manufacturing and Materials Processing, 8(5), 232. https://doi.org/10.3390/jmmp8050232

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Mechanical and Microstructural Characterization of Class 800 Complex Phase Steel before and after the Laser Welding Process

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