Crystal plasticity computation and atomic force microscopy analysis of the internal hydrogen-induced slip localization on polycrystalline stainless steel

Aubert, Isabelle; Saintier, Nicolas; Olivé, Jean-Marc

doi:10.1016/j.scriptamat.2012.01.019

Cited by 20 publications

(10 citation statements)

References 13 publications

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“…The average distance between slip bands increased from 1.92 µm in uncharged specimens to 4.7 µm in precharged specimens. Similar results could be obtained by Aubert et al in AISI 316L [25] and by Abraham et al in AISI 310s [26]. Both showed that in presence of hydrogen, an increase in slip band heigths and spacing of slip bands can be investigated.…”

Section: Resultssupporting

confidence: 87%

Modeling of hydrogen effects on short crack propagation in a metastable austenitic stainless steel (X2CrNi19-11)

et al. 2018

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The experimentally observed short fatigue crack growth rate of an uncharged specimen tested in air is compared with results obtained from specimens tested in 10 MPa hydrogen atmosphere and specimens previously charged with hydrogen. To further discuss the hydrogen related short propagation mechanisms, a simulation approach for predicting short fatigue crack growth is presented. The boundary element method is used for calculating stresses and displacements in an anisotropic elastic solid. The hydrogen concentration is assumed to be homogeneously distributed in the microstructure. Based on this modelling approach, it could be concluded that hydrogen leads to an increasing short fatigue crack growth rate due to increasing irreversible deformation processes at the crack tip and also promotes grain boundary cracking in specimens tested in 10 MPa hydrogen atmosphere.

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Section: Resultssupporting

confidence: 87%

Modeling of hydrogen effects on short crack propagation in a metastable austenitic stainless steel (X2CrNi19-11)

et al. 2018

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“…It is commonly used for the numerical simulation of polycrystalline aggregates (Musienko et al, 2007;Barbe and Quey, 2011;Aubert et al, 2012 The orientation tensor m s , which is computed for each slip system s by the tensorial product of the normal to the slip plane n s and the direction of slip l s , is used to compute the resolved shear stress s s and the plastic strain rate tensor, _ e pl . The two material parameters, K and n, represent the sensitivity to strain rate.…”

Section: Materials Behaviour Modelsmentioning

confidence: 99%

Micro-mechanical modelling of high cycle fatigue behaviour of metals under multiaxial loads

Robert

Saintier

Palin‐Luc

et al. 2012

Mechanics of Materials

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. An analysis of high cycle multiaxial fatigue behaviour is conducted through the numerical simulation of polycrystalline aggregates using the finite element method. The metallic material chosen for investigation is pure copper, which has a Face Centred Cubic (FCC) crystalline microstructure. The elementary volumes are modelled in 2D using an hypothesis of generalised plane strain and consist of 300 equi-probability, randomly oriented grains with equiaxed geometry. The aggregates are loaded at levels equivalent to the average macroscopic fatigue strength at 10 7 cycles. The goal is to compute the mechanical quantities at the mesoscopic scale (i.e., average within the grain) after stabilization of the local cyclic behaviour. The results show that the mesoscopic mechanical variables are characterised by high dispersion. A statistical analysis of the response of the aggregates is undertaken for different loading modes: fully reversed tensile loads, torsion and combined in-phase tension-torsion. Via the calculation of the local mechanical quantities for a sufficiently large number of different microstructures, a critical analysis of certain multiaxial endurance criteria (Crossland, Dang Van and Matake) is conducted. In terms of material behaviour models, it is shown that elastic anisotropy strongly affects the scatter of the mechanical parameters used in the different criteria and that its role is predominant compared to that of crystal plasticity. The analysis of multiaxial endurance criteria at both the macroscopic and mesoscopic scales clearly show that the critical plane type criteria (Dang Van and Matake) give an adequate estimation of the shear stress but badly reflect the scatter of the normal stress or the hydrostatic stress.

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“…While the minimum height is identical, the highest slip bands in the precharged specimens are higher compared with those in the reference specimens (0.14 µm to 0.08 µm, respectively). Also, Aubert et al have found this effect in stainless steel 316L specimens [10]. For AISI 310s stainless steel specimens, Robertson shows an increase of the slip band height because of hydrogen [11].…”

Section: Results Discussion and Modeling Concept 31 Results: Austenmentioning

confidence: 99%

Hydrogen Embrittlement Mechanism in Fatigue Behaviour of Austenitic and Martensitic Stainless Steels

et al. 2018

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Abstract. In the present study, the influence of hydrogen on the fatigue behaviour of the high strength martensitic stainless steel X3CrNiMo13-4 and the metastable austenitic stainless steels X2Crni19-11 with various nickel contents was examined in the low and high cycle fatigue regime. The focus of the investigations was the changes in the mechanisms of short crack propagation. The aim of the ongoing investigation is to determine and quantitatively describe the predominant processes of hydrogen embrittlement and their influence on the short fatigue crack morphology and crack growth rate. In addition, simulations were carried out on the short fatigue crack growth, in order to develop a detailed insight into the hydrogen embrittlement mechanisms relevant for cyclic loading conditions.

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Crystal plasticity computation and atomic force microscopy analysis of the internal hydrogen-induced slip localization on polycrystalline stainless steel

Cited by 20 publications

References 13 publications

Modeling of hydrogen effects on short crack propagation in a metastable austenitic stainless steel (X2CrNi19-11)

Modeling of hydrogen effects on short crack propagation in a metastable austenitic stainless steel (X2CrNi19-11)

Micro-mechanical modelling of high cycle fatigue behaviour of metals under multiaxial loads

Hydrogen Embrittlement Mechanism in Fatigue Behaviour of Austenitic and Martensitic Stainless Steels

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