RT Journal Article
SR Electronic
A1 Uhríčik, Milan
A1 Palček, Peter
A1 Chalupová, Mária
A1 Kuchariková, Lenka
A1 Pastierovičová, Lucia
A1 Medvecká, Denisa
A1 Markovičová, Lenka
A1 Balšianka, Róbert
A1 Vaško, Alan
T1 Structural and Fractographic Analysis of Aluminum Alloy before and after Fatigue Loading
JF Manufacturing Technology Journal
YR 2023
VO 23
IS 5
SP 725
OP 731
DO 10.21062/mft.2023.067
UL https://journalmt.com/artkey/mft-202305-0001.php
AB 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.