Synchrotron investigations of non-uniformly shaped shot-peened samples

Venter, А.M.; Grange, C. P. la; Hofmann, Felix; Jun, Tea‐Sung; Belnoue, Jonathan P.-H.; Heerden, Phillipus R. van; Evans, Alexander; Korsunsky, Alexander M.

doi:10.1524/zksu.2009.0046

Cited by 3 publications

(1 citation statement)

References 2 publications

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“…The residual stresses may, however, be also beneficial to the component's performance. For example, surfaces of structural components are subjected to shot peening which introduces compressive stresses in them preventing crack nucleation in the surface layer under tensile working conditions [3].…”

Section: Introductionmentioning

confidence: 99%

Internal stresses in steel plate generated by shape memory alloy inserts

et al. 2012

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Neutron strain scanning was employed to investigate the internal stress fields in steel plate coupons with embedded prestrained superelastic NiTi shape memory alloy inserts. Strain fields in steel were evaluated at T=21°C and 130 °C on virgin coupons as well as on mechanically and thermally fatigued coupons. Internal stress fields were evaluated by direct calculation of principal stress components from the experimentally measured lattice strains as well as by employing inverse FE modelling approach. It is shown that if the NiTi inserts are embedded into the elastic steel matrix following a carefully designed technological procedure, the internal stress fields vary with temperature in a reproducible and predictable way. It is estimated that this mechanism of internal stress generation can be safely applied in the temperature range from -20 °C to 150 °C and is relatively resistant to thermal and mechanical fatigue. The predictability and fatigue endurance of the mechanism is of essential importance for development of future smart metal matrix composites or smart structures with embedded shape memory alloy components.

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Section: Introductionmentioning

confidence: 99%

Internal stresses in steel plate generated by shape memory alloy inserts

et al. 2012

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Inverse Eigenstrain Analysis of the Effect of Non-uniform Sample Shape on the Residual Stress Due to Shot Peening

2010

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This paper deals with the analysis of elastic strain and eigenstrain in non-uniformly shaped shot-peened 17-4PH stainless steel samples. Based on residual strain measurements by synchrotron X-ray diffraction, the finite element (FE) models are established for the inverse problem of eigenstrain analysis in slice conical sample. The eigenstrains obtained in the slice are then implemented into the FE model of the solid conical sample. It is found that the dependence of elastic strain distributions on the peening intensity and sample shape/thickness could be elucidated via the understanding of underlying permanent strain, or eigenstrain. The effect of the peening process is therefore best described in terms of the induced eigenstrain. The proposed framework is useful for the predictive modelling of residual stresses in non-uniformly shaped shot-peened materials, in that it allows efficient reconstruction of complete residual stress states. In addition, it provides an excellent basis for developing predictive tools for in service performance and design optimisation.

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Eigenstrain analysis of non-uniformly shaped shot-peened samples

Jun

Venter

Grange³

et al. 2009

Procedia Engineering

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This paper presents the results of eigenstrain analysis in non-uniformly shaped shot-peened 17-4PH stainless steel samples. The finite element models are established for inverse eigenstrain analysis of slices and bulk conical samples. It is shown that the elastic strain distributions and relief are directly related to peening intensity and sample shape/thickness via the underlying permanent strain, or eigenstrain. Thus, the effect of the peening treatment is best described in terms of the induced eigenstrain. The proposed framework for predictive modelling of residual stresses in non-uniformly shaped shot-peened materials allows efficient reconstruction of complete residual stress state, and provides an excellent basis for developing predictive tools for in service performance and design optimization.

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Synchrotron investigations of non-uniformly shaped shot-peened samples

Cited by 3 publications

References 2 publications

Internal stresses in steel plate generated by shape memory alloy inserts

Internal stresses in steel plate generated by shape memory alloy inserts

Inverse Eigenstrain Analysis of the Effect of Non-uniform Sample Shape on the Residual Stress Due to Shot Peening

Eigenstrain analysis of non-uniformly shaped shot-peened samples

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