Effect of microstructure anisotropy on the deformation of MAX polycrystals studied by in-situ compression combined with neutron diffraction - Archive ouverte HAL Access content directly
Journal Articles Applied Physics Letters Year : 2014

Effect of microstructure anisotropy on the deformation of MAX polycrystals studied by in-situ compression combined with neutron diffraction

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Antoine Guitton
A. Joulain
  • Function : Author
L. Thilly
  • Function : Author
  • PersonId : 877593

Abstract

In situ compression tests combined with neutron diffraction were performed on Ti2AlN MAX polycrystals with lamellar anisotropic microstructure: the diffraction peak evolution (position and profile) with applied stress reveals that lamellar grains parallel to compression axis remain elastic while lamellar grains perpendicular to compression plastify, both families being subjected to strong variations of heterogeneous strains (types II and III). We demonstrate that this behavior originates from the complex response of the very anisotropic lamellar microstructure and explains the observation of reversible hysteretic loops when cycling MAX polycrystals even in the elastic regime.
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Dates and versions

hal-01503721 , version 1 (08-12-2020)

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Antoine Guitton, S. van Petegem, C. Tromas, A. Joulain, H. van Swygenhoven, et al.. Effect of microstructure anisotropy on the deformation of MAX polycrystals studied by in-situ compression combined with neutron diffraction. Applied Physics Letters, 2014, 104 (24), ⟨10.1063/1.4884601⟩. ⟨hal-01503721⟩
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