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Title: Effects Of Shot Peening On Torsional Fstigue Limit For Spring Steel Specimens Containing An Artificial Surface Defect
Author: Takahashi, Ando, Okada, Furuyama, Ishizuka, Nishim
Source: Conf Proc: ICSP-10 Tokyo, Japan 2008
Publication year 2008
Document number: 2008089
Number of pages: 6
Abstract:
ABSTRACT
Effects of shot peening on the torsional fatigue limit of spring steel specimens containing an artificial small hole were investigated. A drilled hole of 0.2 – 0.8 mm in
diameter or a semi-circular slit with diameter of 0.3 and 0.6 mm was introduced on the specimen surface. Then, torsional fatigue tests were carried out with the specimens.
The torsional fatigue limits of specimens containing a drilled hole or a semi-circular slit were increased by SP 25 – 64 % or 156 – 186 %, respectively. The specimens
containing a drilled hole under 0.3 mm in diameter and a semi-circular slit under 0.3 mm in diameter had very high fatigue limits almost equal to those of non-defect
shot-peened specimens. From these results, it can be concluded that a drilled hole under 0.3 mm in diameter and a semi-circular slit under 0.3 mm in diameter can be made
non-damaging by SP. KEY WORDS Shot peening, Torsional fatigue limit, Surface defect, Residual stress
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This page last revised: 03/22/2010