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Article Dans Une Revue Materials Science and Engineering: A Année : 2021

Lattice strain development in an alpha titanium alloy studied using synchrotron and neutron diffraction

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Neutron and high-energy X-ray diffraction methods have been used to investigate deformation mechanisms (slip and twinning activities) during uniaxial tensile tests of Grade 1 commercially pure titanium (Ti-α). These two diffraction techniques have provided valuable and complementary information. The predictions made by an Elasto-Plastic Self-Consistent (EPSC) model, taking into account grain reorientation and stress relaxation induced by twinning activity, have been compared with the experimental data. Results clearly demonstrate that there is a good agreement between simulations and diffraction measurements. The EPSC model enables accurate predictions of: (i) the lattice strains developed in variously oriented {hk.l} grain families within the bulk material, (ii) the grain reorientation induced by twinning activity and (iii) the macroscopic stress-strain response. Two different textured products were studied in order to evaluate the influence of texture on the mesoscopic and macroscopic responses of Ti-α alloy.
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hal-04032770 , version 1 (13-06-2023)

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Kodjo Emmanuel Agbovi, Baptiste Girault, Jamal Fajoui, Saurabh Kabra, Winfried Kockelmann, et al.. Lattice strain development in an alpha titanium alloy studied using synchrotron and neutron diffraction. Materials Science and Engineering: A, 2021, 819, pp.141489. ⟨10.1016/j.msea.2021.141489⟩. ⟨hal-04032770⟩
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