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Texture evolution of orthorhombic α″ titanium alloy investigated by in situ X-ray diffraction

Abstract : The present paper deals with an in-situ X-ray diffraction analysis during cyclic tensile tests of a fully martensitic Ti-24Nb alloy. Texture evolution of martensite alpha '' phase was followed during loading-unloading cycles. Preferential formation and reverse transformation of particular martensite variants have been observed based on pole figure analysis. The occurrence of the deformation mechanisms for the martensitic Ti-24Nb alloy was also commented by coupling microstructural observations during in-situ experiments and additional cyclic tests followed by heating after each unloading. Through the study of the evolution of the lattice strain, it was found that under loading conditions, the {020} planes exhibit a large tension lattice strain while the {200} planes are subjected to a compression solicitation, which causes the lattice parameters a and c to be shrunk, and b to be elongated.
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Submitted on : Thursday, July 13, 2017 - 1:50:59 PM
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Elmay et al. - Texture evoluti...
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W. Elmay, S. Berveiller, E. Patoor, T. Gloriant, F. Prima, et al.. Texture evolution of orthorhombic α″ titanium alloy investigated by in situ X-ray diffraction. Materials Science and Engineering: A, Elsevier, 2017, 679, pp.504-510. ⟨10.1016/j.msea.2016.10.072⟩. ⟨hal-01438109⟩



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