| Issue |
MATEC Web Conf.
Volume 318, 2020
7th International Conference of Materials and Manufacturing Engineering (ICMMEN 2020)
|
|
|---|---|---|
| Article Number | 01033 | |
| Number of page(s) | 6 | |
| DOI | https://doi.org/10.1051/matecconf/202031801033 | |
| Published online | 14 August 2020 | |
Non-destructive testing of welded fatigue specimens
1
Department of Mechanical Engineering, University of Western Macedonia, Kozani, Greece
2
Department of Mechanical Engineering, Aristotle University of Thessaloniki, Greece
* Corresponding author: spapanikolaou@uowm.gr
Non-destructive tests were conducted on welded fatigue specimens prepared using the same steel material and welding method as the one used in the manufacture and repair procedures of a KRUPP SchRs 600 bucket wheel excavator to reveal any defects present. The chemical composition, the mechanical properties, tendency to cracks and the microstructure of the bucket wheel material were determined using appropriate tests. The initiation of cracks and their subsequent growth during fatigue testing of the welded specimens was studied using ultrasound testing (UT) and a metallographic examination in order to investigate the causes of failure during service and predict fatigue life of the bucket wheel welded parts. It was found that the welding method used produces welds with numerous discontinuities that can only be detected using ultrasound techniques.
© The Authors, published by EDP Sciences, 2020
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