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Comparison of the Consequences of Shot Peening Treatment Methods on the Surface Layer Characteristics of Ti6246

✍ Scribed by Goetz G. Feldmann; Wolfgang Hennig; Thomas Haubold; Wolfgang Zinn; Berthold Scholtes

Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
647 KB
Volume
13
Category
Article
ISSN
1438-1656

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✦ Synopsis

Abstract

Shot peening, as a technique to enhance the surface characteristics of rotating parts in aircraft engines is well known as a way to prevent the initiation and propagation of cracks. However, shot peening generally increases the surface roughness and therefore, reduces aerodynamic efficiency on aerofoil. This paper aims to compare different shot peening procedures as regards roughness, hardness, residual stress magnitude and depth in Ti6246, in order to identify a method, which leads to the required mechanical properties, but keeps the increase of surface roughness to a minimum. Therefore, Ti6246 specimens, processed similarly to integral bladed compressor disks, are treated with defined target intensity and coverage. The changes in surface roughness, residual stress, and hardness are measured and discussed.

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