scholarly journals Improvement of fatigue strength by shot peening for spring steel specimens containing an artificial surface defect

2007 ◽  
pp. 9-13 ◽  
Author(s):  
Koji TAKAHASHI ◽  
Toshihiko AMANO ◽  
Takamasa MIYAMOTO ◽  
Kotoji ANDO ◽  
Fumio TAKAHASHI ◽  
...  
Keyword(s):  
Fatigue Strength ◽  
Shot Peening ◽  
Surface Defect ◽  
Spring Steel ◽  
Artificial Surface

Effect of Shot Peening on Fatigue Strength of High-Toughness Spring Steel

2013 ◽  
Vol 84 (12) ◽  
pp. 1333-1339 ◽  
Author(s):  
Yasunori Harada ◽  
Hiroki Kosaka ◽  
Makoto Ishihara
Keyword(s):  
Fatigue Strength ◽  
Shot Peening ◽  
Spring Steel ◽  
High Toughness

scholarly journals Fatigue limit analysis of shot peened spring steel

2021 ◽  
Author(s):  
NohJun Myung ◽  
Liang Wang ◽  
Nak-Sam Choi
Keyword(s):  
Fatigue Strength ◽  
Fatigue Limit ◽  
Shot Peening ◽  
High Cycle Fatigue ◽  
High Strength ◽  
Spring Steel ◽  
Cycle Fatigue ◽  
Positive Effects ◽  
Fracturing Process ◽  
Fish Eye

This paper investigated the effect of shot-peening on fatigue strength of spring steel for the high cycle fatigue (HCF) and very high cycle fatigue (VHCF) to clarify the fatigue limit behavior of high strength spring steel during service life. Hourglass shape specimens made of spring steel (Si-Cr alloys) were prepared for the rotary bending fatigue test. Actual local stresses were quantitatively calculated to compensate for the stress amplitudes, through which it was clarified that the shot-peening had strongly positive effects on the HCF strength, but rather negative effect on the VHCF strength. The fish-eye fracturing process confirmed that most fish-eye fractures arose at sites deeper than the compressive residual stress zone, which did not prevent the creation of the fish-eye, and the fatigue strength improvement in the VHCF range could scarcely be shown as a result of the shot-peening treatment.

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