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Investigation of the Shaft Failure Connected to Extruder

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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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Authors and Affiliations

  1. Department of Materials Science and Engineering, Sharif University of Technology, Tehran, Iran

    S. S. Pelaseyed

  2. School of Metallurgical and Materials Engineering, College of Engineering, University of Tehran, Tehran, Iran

    F. Mashayekhi & A. Movahedi-Rad

Authors
  1. S. S. Pelaseyed
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  2. F. Mashayekhi
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  3. A. Movahedi-Rad
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Correspondence to A. Movahedi-Rad.

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Pelaseyed, S.S., Mashayekhi, F. & Movahedi-Rad, A. Investigation of the Shaft Failure Connected to Extruder. J Fail. Anal. and Preven. 15, 775–781 (2015). https://doi.org/10.1007/s11668-015-0030-9

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  • DOI: https://doi.org/10.1007/s11668-015-0030-9

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