Author:
Papanikolaou Sofia,Fasnakis Dimitrios,Maropoulos Andreas,Giagopoulos Dimitrios,Maropoulos Stergios,Theodoulidis Theodoros
Abstract
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.
Reference26 articles.
1. Failure of the bucket wheel excavator buckets
2. ASTM E 466-2002. ‘Standard Practice Conducting Force Controlled Constant Amplitude Fatigue Tests of Metallic Materials’
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