Application of Vibropeening on Aero-Engine Components

Author:  G. G. Feldmann, T. Haubold, C. C. Wong and W. Wei
Source:  Conf Proc 2014: ICSP-12 Goslar, Germany (pgs.535-540)
Doc ID:  2014133
Year of Publication:  2014
Abstract:  
Vibropeening is a ball pressure polishing method mainly used for treatment of car rims, various types of furniture and cutlery to improve their visual appearance. Vibropeening combines two important capabilities: the "burnishing" effect which decreases surface roughness without material removal and the "peening" effect which increases fatigue life through introduction of residual compressive stresses. This combination of effects in one technology enables a replacement of the two generally used technologies shot peening and vibrofinishing which allows reduction of cost especially on complex 30 shaped parts with large surfaces such as blade integrated disk (blisk) rotors. This paper describes the treatment of test components, the investigation of the key process variables and the method applied for process evaluation. Compared to shot peening and vibrofinishing (drum-blade-polishing), surface roughness, residual stress depth distribution and high cycle fatigue (HCF) strength are investigated. Assets and drawbacks are shown and discussed.