Plasticity in polycrystalline fretting fatigue contacts

Goh, Chung‐Hyun; McDowell, David L.; Neu, Richard W.

doi:10.1016/j.jmps.2005.06.009

Cited by 53 publications

(27 citation statements)

References 26 publications

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“…16 shows an inhomogeneous distribution of contact slip, corresponding with the distributions of contact pressure and shear of Fig. 11, which, as mentioned above, are indicative of the development of ''natural surface roughness'' [14]. An apparent stick region is observed in Fig.…”

Section: Dual Phase Cp Fretting Crack Initiationmentioning

confidence: 62%

“…However with increased fretting cycles it is clear that surface microstructural inhomogeneities lead to an inhomogeneous distribution of contact pressure. Goh et al [14] described this as the development of a ''natural surface roughness'' in the contact wear scar. Hence, for N > 1 the mean CP pressure distribution follows the general Hertzian profile but with significant local variations about this mean Hertzian distribution, giving rise to locally (much) higher peak contact pressures.…”

Section: Predicted Low Cycle Behaviour Of Ti-6al-4vmentioning

confidence: 99%

“…This rate-dependant theory has been used extensively in the design of stent struts by McHugh and Connolly [10] and McGarry et al [11] for 316L stainless steel (SS). CP has been used by McDowell and co-workers [12][13][14] to model fretting of Ti6Al-4V.…”

Section: Introductionmentioning

confidence: 99%

“…The complex microstructure of Ti-6Al-4V is comprised of a dual phase structure containing both hexagonal close packed (HCP) and body centre cubic (BCC) crystals; the a phase has a HCP crystallographic arrangement and the a-b phase is comprised of a lamellar colony of both HCP and BCC crystallographic arrangements. Extensive modelling of Ti-6Al-4V microstructure has been carried out by McDowell [12][13][14] and Cailletuad [17,18]. Benedetti and Fontanari [19] established monotonic and cyclic stress strain curves (CSSCs) for Ti-6Al-4V while investigating fatigue crack growth.…”

Section: Introductionmentioning

confidence: 99%

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Micro-mechanical modelling of fretting fatigue crack initiation and wear in Ti–6Al–4V

McCarthy

McGarry

Leen

2014

International Journal of Fatigue

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a b s t r a c tA micro-mechanical modelling methodology is presented for predicting fretting fatigue crack nucleation in Ti-6Al-4V. The methodology is based on a combination of (i) a unit cell crystal plasticity model of Ti6Al-4V, (ii) a frictional contact model of an experimental fretting wear configuration, and (iii) implementation of a microstructure-sensitive fatigue indication parameter for prediction of crack nucleation. A novel micro-mechanical method for wear prediction is presented. A key finding is the important role of cyclic micro-plasticity in ostensibly elastic loading regimes in fretting wear, resulting in significant effects on distributions of salient fretting contact variables such as contact pressure.

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Section: Dual Phase Cp Fretting Crack Initiationmentioning

confidence: 62%

Section: Predicted Low Cycle Behaviour Of Ti-6al-4vmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Micro-mechanical modelling of fretting fatigue crack initiation and wear in Ti–6Al–4V

McCarthy

McGarry

Leen

2014

International Journal of Fatigue

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“…Recently, constitutive laws were developed to model cyclic deformation at macroscopic and microscopic scales [38][39][40][41][42][43][44][45]. A paper review of the different proposed polycrystalline constitutive laws and models was published by Roters et al [46].…”

Section: Introductionmentioning

confidence: 99%

Polycrystal modelling of fatigue: Pre-hardening and surface roughness effects on damage initiation for 304L stainless steel

Pecheur

Curtit²,

Clavel

et al. 2012

International Journal of Fatigue

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a b s t r a c tThe 304L stainless steel is a major component of residual heat removal circuits of pressurized water reactors (PWRs). The main purpose of this study is to understand the risk of thermal fatigue damage resulting from the machining of the 304L steel pipes inner surface (pre-hardening gradient, residual stresses and scratches), at the scale of the microstructure. This work is based on previous results obtained for pipe specimens thanks to a macroscopic elasto-visco-plastic model. Applied to the pipe specimens, this modelling showed that a thermal loading with temperature gradient, induced a cyclic non-linear biaxial loading at the inner surface of the pipe. In this paper, a polycrystal plasticity model, implemented in a Finite Element (FE) code, is adapted to cyclic loading. An elementary volume (3D aggregate), representing the inner surface and sub-surface of the 304L steel tube, is built from successive polishings and orientation mappings thanks to an Electron Back Scattering Diffraction method. At the grain scale, the polycrystal model is used as a ''numerical microscope'' to compute the local mechanical fields. Different fatigue criteria are tested to determine their sensitivity to surface properties (roughness, residual stress and pre-hardening) and to the microstructure of the material (crystallographic orientation and grain size). Pre-hardening leads to a lower and more homogeneous distribution of local strain amplitudes in the aggregate, but slightly higher stresses when compared to initial material without hardening. By contrast, surface roughness leads to large localized strain and stress fields in grains located at the bottom of scratches. To determine the surface micro-structural ''hot spots'' features and to test the sensitivity of different surface conditions, three different fatigue criteria (Manson-Coffin, Fatemi-Socie and Dissipated Energy criteria) have been computed. We point out that the pre-hardening may have a complex effect on fatigue resistance, since it reduces local plastic strain amplitudes, but increases local stresses. Moreover, the pre-hardening has a positive effect on fatigue since it delays damage initiation. By contrast, the surface roughness leads to a negative effect. However, we have shown that the three different fatigue criteria do not deliver similar quantitative predictions. Relevant criteria for high cycle fatigue, such as stress based criteria, are not considered in this paper, since the thermal loading used for computation is large enough to reduce cyclic plastic strain straining within all grains of 304L pipe inner surface for midlife of experiments.

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Cyclic Plasticity of Metals

2017

Cyclic Plasticity of Engineering Materials

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Plasticity in polycrystalline fretting fatigue contacts

Cited by 53 publications

References 26 publications

Micro-mechanical modelling of fretting fatigue crack initiation and wear in Ti–6Al–4V

Micro-mechanical modelling of fretting fatigue crack initiation and wear in Ti–6Al–4V

Polycrystal modelling of fatigue: Pre-hardening and surface roughness effects on damage initiation for 304L stainless steel

Cyclic Plasticity of Metals

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