In situ monitoring of the deformation mechanisms in titanium with different oxygen contents.

Abstract : The deformation mechanisms of two titanium batches with different oxygen contents were monitored during tensile tests performed along the rolling and transverse directions under an optical or scanning electron microscope, after EBSD mappings of grain orientations. Whereas the contribution of mechanical twinning was very limited, grain boundary sliding, sometimes leading to intergranular decohesion, as well as kink bands formation were observed. Based on the identification of the primary slip traces in a significant number of grains, the critical resolved shear stresses (CRSSs) for prismatic, basal and pi1 were estimated. Transmission electron microscopy was used to identify unambiguously dislocations of pi1 systems and to estimate the corresponding CRSS. The difference in oxygen content between T40 and T60 was found to modify the magnitude of the CRSSs, but to leave their relative values nearly unchanged. The evolutions in the work hardening rate were correlated with the active deformation mechanisms.
Complete list of metadatas

Cited literature [28 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-01227185
Contributor : Véronique Doquet <>
Submitted on : Monday, November 16, 2015 - 10:23:01 AM
Last modification on : Thursday, December 19, 2019 - 1:35:52 AM

Identifiers

Citation

Bassem Barkia, Véronique Doquet, Jean-Philippe Couzinie, Ivan Guillot, Eva Héripré. In situ monitoring of the deformation mechanisms in titanium with different oxygen contents.. Materials Science and Engineering: A, Elsevier, 2015, 636, pp.91-102. ⟨10.1016/j.msea.2015.03.044⟩. ⟨hal-01227185⟩

Share

Metrics

Record views

589