Authors: S S Pelaseyed F Mashayekhi A MovahediRad
Publish Date: 2015/10/22
Volume: 15, Issue: 6, Pages: 775-781
Abstract
In this study the failure analysis of a shaft of a unit which had been failed during the service was studied This shaft was welded to the blades and their chemical compositions were determined by spectroscopy method In order to determine the root cause of failure and contribution factors different investigation methods including visual examination optical microscopy and scanning electron microscope analysis and hardness test were carried out It was concluded that the shaft was failed due to fatigue The failure was caused by improper welding of blades to the shaft At the end in order to prevent or decelerate such failure some recommended remedies were suggested
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