Effect of surface flaw on fatigue strength of shot-peened medium-carbon steel

Junji Sakamoto; Yong Sung Lee; Seong Kyun Cheong

doi:10.1016/j.engfracmech.2014.11.005

Effect of surface flaw on fatigue strength of shot-peened medium-carbon steel

Junji Sakamoto, Yong Sung Lee, Seong Kyun Cheong

Research output: Contribution to journal › Article › peer-review

29 Citations (Scopus)

Abstract

The effect of surface flaw on fatigue strength of shot-peened medium-carbon steel was experimentally studied. The fatigue crack initiation life, fatigue crack growth life, and fatigue limit in the steel can be increased by using shot peening (SP). The fatigue fracture of SP specimen occurred by the propagations and coalescence of fatigue cracks initiated from the initial cracks due to SP. The fatigue limit of SP specimen was determined by the propagation limit of fatigue crack. When the size of surface flaw is sufficiently small compared to the SP affected zone, the flaws have not significantly changed the fatigue strength of the SP specimens.

Original language	English
Pages (from-to)	99-111
Number of pages	13
Journal	Engineering Fracture Mechanics
Volume	133
DOIs	https://doi.org/10.1016/j.engfracmech.2014.11.005
Publication status	Published - Jan 1 2015
Externally published	Yes

Keywords

Fatigue strength
Focused ion beam
Shot peening
Small fatigue crack behavior
Surface flaw

ASJC Scopus subject areas

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

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10.1016/j.engfracmech.2014.11.005

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title = "Effect of surface flaw on fatigue strength of shot-peened medium-carbon steel",

abstract = "The effect of surface flaw on fatigue strength of shot-peened medium-carbon steel was experimentally studied. The fatigue crack initiation life, fatigue crack growth life, and fatigue limit in the steel can be increased by using shot peening (SP). The fatigue fracture of SP specimen occurred by the propagations and coalescence of fatigue cracks initiated from the initial cracks due to SP. The fatigue limit of SP specimen was determined by the propagation limit of fatigue crack. When the size of surface flaw is sufficiently small compared to the SP affected zone, the flaws have not significantly changed the fatigue strength of the SP specimens.",

keywords = "Fatigue strength, Focused ion beam, Shot peening, Small fatigue crack behavior, Surface flaw",

author = "Junji Sakamoto and Lee, {Yong Sung} and Cheong, {Seong Kyun}",

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year = "2015",

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doi = "10.1016/j.engfracmech.2014.11.005",

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AU - Sakamoto, Junji

AU - Lee, Yong Sung

AU - Cheong, Seong Kyun

PY - 2015/1/1

Y1 - 2015/1/1

N2 - The effect of surface flaw on fatigue strength of shot-peened medium-carbon steel was experimentally studied. The fatigue crack initiation life, fatigue crack growth life, and fatigue limit in the steel can be increased by using shot peening (SP). The fatigue fracture of SP specimen occurred by the propagations and coalescence of fatigue cracks initiated from the initial cracks due to SP. The fatigue limit of SP specimen was determined by the propagation limit of fatigue crack. When the size of surface flaw is sufficiently small compared to the SP affected zone, the flaws have not significantly changed the fatigue strength of the SP specimens.

AB - The effect of surface flaw on fatigue strength of shot-peened medium-carbon steel was experimentally studied. The fatigue crack initiation life, fatigue crack growth life, and fatigue limit in the steel can be increased by using shot peening (SP). The fatigue fracture of SP specimen occurred by the propagations and coalescence of fatigue cracks initiated from the initial cracks due to SP. The fatigue limit of SP specimen was determined by the propagation limit of fatigue crack. When the size of surface flaw is sufficiently small compared to the SP affected zone, the flaws have not significantly changed the fatigue strength of the SP specimens.

KW - Fatigue strength

KW - Focused ion beam

KW - Shot peening

KW - Small fatigue crack behavior

KW - Surface flaw

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JO - Engineering Fracture Mechanics

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ER -

Effect of surface flaw on fatigue strength of shot-peened medium-carbon steel

Abstract

Keywords

ASJC Scopus subject areas

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