Influence of Crystalline Elasticity on the Stress Distribution at the Free Surface of an Austenitic Stainless Steel Polycrystal. Comparison with Experiments

Maxime Sauzay; Jiří Man

doi:10.4028/www.scientific.net/MSF.567-568.149

Paper Titles

Micromechanical Dynamic Influence of Rigid Disk-Shaped Inclusion on Neighboring Crack in 3D Elastic Matrix
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The Analysis of the Stress and Displacement Field near the Surface Crack Tip Terminating Perpendicular to the Interface between Two Orthotropic Materials
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Yield Surface and Complex Loading Path Simulation of a Duplex Stainless Steel Using a Bi-Phase Polycrystalline Model
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Cohesive Zone Model and GTN Model Collation for Ductile Crack Growth
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Influence of Crystalline Elasticity on the Stress Distribution at the Free Surface of an Austenitic Stainless Steel Polycrystal. Comparison with Experiments
p.149

FGM Structure Characterization by Distance Functions and Systematic Scanning Method
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Application of Point Sampled Intercept Method in Quantitative Description of Anisotropic Structures
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Interdiffusion and Order Fracture over Grain Boundaries in the Deformed Ni₃Al Intermetallide
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Aggregatization of Frenckel Defects in Ni and Intermetallide Ni₃Al
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HomeMaterials Science ForumMaterials Science Forum Vols. 567-568Influence of Crystalline Elasticity on the Stress...

Influence of Crystalline Elasticity on the Stress Distribution at the Free Surface of an Austenitic Stainless Steel Polycrystal. Comparison with Experiments

Abstract:

This numerical study focuses on the recent observations of Man et al. [4] showing welloriented grains presenting no Persistent Slip Marking even if PSMs are observed in 86% of the surface grains in 316L austenitic stainless steel cycled at room temperature up to 60% of fatigue life. Scanning Electron Microscopy (SEM) permits us to build Finite Element (FE) meshes of the observed aggregates and to assign to the modelled grains the crystallographic orientations measured by Electron Back Scattering Diffraction (EBSD). Then, 3D FE computations using crystalline elasticity allow the evaluation of mean grain stress tensors and resolved shear stresses. The results could explain qualitatively the anomalous behaviour of the studied well-oriented grains which is partly due to the particular orientations and shapes of the neighbour grains. This study highlights the influence of crystalline elasticity and neighbour grains in microplasticity and crack nucleation.

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Materials Science Forum (Volumes 567-568)

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149-152

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https://doi.org/10.4028/www.scientific.net/MSF.567-568.149

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Online since:

December 2007

Authors:

Maxime Sauzay, Jiří Man

Keywords:

Austenite, Crystalline Elasticity, Fatigue, FE Computations, Persistent Slip Markings

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