Misorientation measurements near grain boundary cracks after fatigue tests

Blochwítz, C.; Brechbühl, J.; Tirschler, W.

doi:10.1007/bf02206406

Cited by 7 publications

(1 citation statement)

References 12 publications

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“…Experimental observations using Electron Back Scattering Diffraction (EBSD) technique [2,3] and Atomic Force Microscope (AFM) [4,5] give accurate information about the influence of local microstructure features on micro-crack nucleation. Nowadays, researchers are using nondestructive three-dimensional imaging techniques to investigate the role of local microstructure in the evolution of short fatigue cracks in Titanium polycrystals [6,7].…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of the effect of surface roughness on mechanical fields in polycrystalline aggregates

Guilhem

Basseville

Curtit³

et al. 2018

Modelling Simul. Mater. Sci. Eng.

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This paper is dedicated to the study of the influence of surface roughness on local stress and strain fields in polycrystalline aggregates. Finite element computations are performed with a crystal plasticity model on a 316L stainless steel polycrystalline material element with different roughness states on its free surface. The subsequent analysis of the plastic strain localization patterns shows that surface roughness strongly affects the plastic strain localization induced by crystallography. Nevertheless, this effect mainly takes place at the surface and vanishes under the first layer of grains, which implies the existence of a critical perturbed depth. A statistical analysis based on the plastic strain distribution obtained for different roughness levels provides a simple rule to define the size of the affected zone depending on the rough surface parameters.

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