Manufacturing Technology 2023, 23(5):725-731 | DOI: 10.21062/mft.2023.067

Structural and Fractographic Analysis of Aluminum Alloy before and after Fatigue Loading

Milan Uhríčik ORCID..., Peter Palček ORCID..., Mária Chalupová ORCID..., Lenka Kuchariková ORCID..., Lucia Pastierovičová ORCID..., Denisa Medvecká ORCID..., Lenka Markovičová ORCID..., Róbert Balšianka, Alan Vaško ORCID...
Department of Materials Engineering, Faculty of Mechanical Engineering, University of Žilina. Univerzitná 8215/1, 01026 Žilina. Slovakia

The article deals with the analysis of the structure and fracture surface of aluminum alloy samples. Alu-minum alloy AlMg9 was used as an experimental material. The material from which the samples were made was supplied as cast without heat treatment, and specifically the material was produced by the continuous casting method. The structure of the test material was examined using a Neophot 32 optical microscope, and the fracture surface of the test sample was examined using a scanning electron microscope (SEM). The fatigue life of the aluminum alloy was tested by three-point bending cyclic loading using the parameters - frequency f = 100 Hz, temperature T = 22 ± 5 ℃ and stress ratio R = 0.11. The analysis showed that cast aluminum alloys are very sensitive to casting defects, such as porosity or the content and distribution of intermetallic phases. If large pores or phases are present on or near the surface of the sample, this can be the dominant cause of fatigue crack initiation and reduction of the fatigue lifetime.

Keywords: Aluminum Alloy, Fracture Surface, Structure, Fatigue, Bending Loading
Grants and funding:

The research was supported by the Scientific Grant Agency of the Ministry of Education of Slovak Republic and Slovak Academy of Sciences, VEGA 01/0134/20, VEGA 01/0398/19, KEGA 016ŽU-4/2020, and projects to support young researchers at UNIZA, the ID of projects 14877 and 12715. This article was also funded by the University of Žilina project 313011ASY4 – “Strategic implementation of additive technologies to strengthen the intervention capacities of emergencies caused by the COVID-19 pandemic.”

Received: August 31, 2022; Revised: August 29, 2023; Accepted: September 1, 2023; Prepublished online: September 14, 2023; Published: December 6, 2023  Show citation

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Uhríčik M, Palček P, Chalupová M, Kuchariková L, Pastierovičová L, Medvecká D, et al.. Structural and Fractographic Analysis of Aluminum Alloy before and after Fatigue Loading. Manufacturing Technology. 2023;23(5):725-731. doi: 10.21062/mft.2023.067.
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