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Influence of Surface Roughness on Evaluation of Stress Gradients in Coatings
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HomeMaterials Science ForumMaterials Science Forum Vol. 681Determining Ti-17 β-Phase Single-Crystal...

Determining Ti-17 β-Phase Single-Crystal Elasticity Constants through X-Ray Diffraction and Inverse Scale Transition Model

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Abstract:

The scope of this work is the determination of single-crystals elastic constants (SEC) from X-ray diffraction lattice strains measurements performed on multi-phase polycrystals submitted to mechanical load through a bending device. An explicit three scales inverse self-consistent model is developed in order to express the SEC of a cubic phase, embedded in a multi-phase polycrystal, as a function of its X-ray Elasticity Constants. Finally, it is applied to a two-phases (α+β) titanium based alloy (Ti-17), in order to estimate Ti-17 β-phase unknown SEC. The purpose of the present work is to account the proper microstructure of the material. In particular, the morphologic texture of Ti-17 a-phase, i.e. the relative disorientation of the needle-shaped grains constituting this phase, is considered owing to the so-called Generalized Self-Consistent model.

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Residual Stresses VIII

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Periodical:

Materials Science Forum (Volume 681)

Pages:

97-102

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.681.97

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Online since:

March 2011

Authors:

Sylvain Fréour, Emmanuel Lacoste, Manuel François, Ronald Guillén

Keywords:

In Situ Analysis, Morphologic Texture, Multiphase Material, Multiscale Modeling, Scale Bridging Aspects, Single-Crystal Elasticity Constants, X-Ray Elasticity Constants

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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