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Title: Singularity Of Cavitation Shotless Peening Compared With Shot Peening
Author: H. Soyama
Source: Conf Proc: ICSP-10 Tokyo, Japan 2008
Publication year 2008
Document number: 2008051
Number of pages: 6
Abstract:
ABSTRACT
Cavitation impacts, which are normally causes severe damage in hydraulic machinery, can be utilized for peening instead of impacts induced by collision of shots. Peening
method using cavitation impacts is named as cavitation shotless peening, as shots are not required. In the present paper, mechanism of cavitation shotless peening including
how to generate cavitation bubbles and its optimization was presented, and singularity of cavitation shotless peening compared with shot peening was discussed by
investigating the peened surface using X-ray diffraction
method. It was revealed experimentally that full width at half maximum FWHM of Xray diffraction from surface treated by cavitation shotless peening was decreased, although
FWHM from shot peened surface increases. It means that cavitation shotless peening released micro-strain which was introduced by machine finishing and heat treatment,
although cavitation shotless peening introduced compressive residual stress in the materials.
KEY WORDS
Residual stress, Fatigue strength, X-ray diffraction, Cavitation
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This page last revised: 03/22/2010