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

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 weldi...

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Bibliographic Details
Published in:Journal of Manufacturing and Materials Processing 2024-10, Vol.8 (5), p.232
Main Authors: Neto, Antonio dos Reis de Faria, Dias, Erica Ximenes, Fukugauchi, Cristina Sayuri, Martins, Marcelo Sampaio, Pereira, Marcelo dos Santos
Format: Article
Language:English
Subjects:
Alveoli
complex phase steel
Dimpling
Ductile fracture
Elongation
Energy absorption
Energy efficiency
Expected values
Fatigue failure
Fatigue tests
High strength steels
Hypotheses
Impact tests
Laser beam welding
laser welding
Lasers
Mechanical properties
Metal fatigue
Microscopy
non-parametric test
Residual stress
Steel
Tensile strength
Tensile tests
Trends
Welding
Yield strength
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Summary: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.
ISSN:2504-4494
2504-4494
DOI:10.3390/jmmp8050232