A non-microstructural crack formation model for understanding fatigue life degradation in shot peened carbon steel under LCF loading

Kim, Jong Cheon; Cheong, Seong Kyun; Noguchi, Hiroshi

doi:10.1016/j.ijfatigue.2014.01.012

Cited by 7 publications

(5 citation statements)

References 22 publications

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“…However, in the low-cycle fatigue (LCF) regime where the relief of CRS is typically more significant, the competition between the effects of surface defects (introduced by shot peening or the manufacturing process) and CRS on short crack growth becomes more pronounced [18,[26][27][28][29][30]. This leads to diminished benefits of shot peening in improving fatigue life, compared with the HCF regime.…”

Section: Introductionmentioning

confidence: 99%

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Numerical modelling of the fatigue crack shape evolution in a shot-peened steam turbine material

You

Achintha

et al. 2017

International Journal of Fatigue

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In this study, the short crack initiation and growth behaviour in a notched sample under low-cycle fatigue (LCF) was investigated in a low-pressure steam turbine material. Different crack initiation mechanisms and crack shape evolution processes were experimentally observed in samples subjected to different surface treatments: polished, T0 (industrially applied shot peening process) and T1 (a less intense shot peening process). To better understand the effects of shot peening on fatigue, a 3D finite element (FE) model was developed to investigate the interaction between crack growth and the effects induced by shot peening. Firstly, residual stress redistribution caused by both mechanical loading and the presence of a crack was numerically investigated. This model was also used to successfully predict the differences in crack shape evolution between varying surface conditions, and quantified the retardation of short crack growth behaviour resulting from shot peening. Finally, the 3D model introduced in this study was compared with a previously developed 2D model with plane strain assumptions to demonstrate the limitation of the 2D model in simulating the crack growth behaviour, and to emphasise the importance of taking the 3D crack shape into account when evaluating the short crack growth behaviour.

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Section: Introductionmentioning

confidence: 99%

“…Sometimes shot peening may further lead to a degraded fatigue life due to the dominant effects of surface defects on accelerating crack initiation and early propagation [27][28][29][30]. Hence, in the LCF regime, the stress-and strain-based approaches may result in non-conservative life prediction, which is unacceptable [24].…”

Section: Introductionmentioning

confidence: 99%

Numerical modelling of the fatigue crack shape evolution in a shot-peened steam turbine material

You

Achintha

et al. 2017

International Journal of Fatigue

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“…However, this tendency towards increase was reversed when the applied stress amplitude was above the yield strength of the original material, and the fatigue lifetime decreased compared with the UP specimens, regardless of SP treatment. This phenomenon has already been discussed by in terms of the 'non-microstructural crack formation model' [26].…”

Section: Resultsmentioning

confidence: 87%

“…From the previous results [12,26], it can be assumed that the induced CRS was already relaxed because of the high mechanical load, which was above the yield strength of the original material.…”

Section: Fatigue Crack Growth From the Edge Of The Fib-ed Notchmentioning

confidence: 96%

Proposed fatigue damage measurement parameter for shot-peened carbon steel based on fatigue crack growth behavior

Kim

Cheong

Noguchi

2015

International Journal of Fatigue

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“…Important but not the foremost, Dalaei et al [10] studied the influence of shot peening on fatigue durability of normalized steel subjected to complicated loading conditions, including overloading and variable amplitude loading along with their influence on fatigue lifetime. In addition to the effect of shot peening treatments on fatigue performance, Kim et al [23] experimentally studied fatigue performance of specimens machined from medium-carbon steel. The fatigue performance of shot peening specimens as well as the accompanied stress relaxation process was analyzed in the low-and high-cycle regime.…”

Section: Introductionmentioning

confidence: 99%

Investigations on the changed intensity shot peening specimens machined from SS304: process characterization, fatigue modeling, and failure analyses

Yang

2022

Int J Adv Manuf Technol

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Characterization on the surface morphology, residual stress relaxation and fatigue life prediction of the changed intensity shot peening specimens machined from SS304 were carried out. The present work aims, first and foremost, to model the fatigue performance of shot peening specimens machined from SS304 in extra-low-, low-and high-cycle regime by clarifying the relaxation life component and fatigue life component with the total failure life, thereby successfully evaluating the fatigue performance of un-/0.1 mmA-/0.25 mmA-/0.4 mmA-peened components with satisfactory results in the whole cycle regime. It is, therefore, essential to provide a precise definition of the master life diagram on the purpose of evaluating the fatigue performance of shot peening components in service by linear interpolation of shot peening intensities considering the engineering applicability. Additionally, the characterization of multiple-fatigue crack initiation to failure was also identified by fractography analysis, which reasonably illustrated the non-conservative life prediction in the high-cycle regime.

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A non-microstructural crack formation model for understanding fatigue life degradation in shot peened carbon steel under LCF loading

Cited by 7 publications

References 22 publications

Numerical modelling of the fatigue crack shape evolution in a shot-peened steam turbine material

Numerical modelling of the fatigue crack shape evolution in a shot-peened steam turbine material

Proposed fatigue damage measurement parameter for shot-peened carbon steel based on fatigue crack growth behavior

Investigations on the changed intensity shot peening specimens machined from SS304: process characterization, fatigue modeling, and failure analyses

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