Elasto-viscoplastic tensile behavior of as-forged Ti-1023 alloy: Experiments and micromechanical modeling - Université de Lorraine Access content directly
Journal Articles Materials Science and Engineering: A Year : 2020

Elasto-viscoplastic tensile behavior of as-forged Ti-1023 alloy: Experiments and micromechanical modeling

Abstract

This works focused on the mechanical behavior of an 'as-forged' Ti-1023 alloy used in airframe forging applications. Its microstructure, characterized by SEM and EBSD, was composed by 15% of primary α p nodules (2-5 μm in size) embedded in millimeter long β grains partially fragmented into equiaxed β subgrains of 5-10 μm. Further neutron diffraction analysis indicated an almost random β texture. Tensile tests at different strain rates were performed. A very low strain rate sensitivity was observed. The contribution of each phase to the overall mechanical behavior was numerically investigated by a two-phase elasto-viscoplastic self-consistent (EVPSC) model with affine-type linearization. Internal stresses arising from elastic and plastic strain incompatibilities were analyzed. Throughout the mechanical loading, {100} β oriented grains were more deformed than {111} β grains and all the α nodules. The onset of plasticity occurred sequentially in the β phase, initially in {110} β grains followed by {111} β and then {100} β ones. The effect of the crystallographic texture on slip activity was also studied through simulations made with a synthetic rotated cube β texture, typical of β-working, while considering α textures in Burgers Orientation Relationship (BOR) with the β phase or being random.
Fichier principal
Vignette du fichier
Ti_Safaa_LEM3_2020_VF-auteur.pdf (1.8 Mo) Télécharger le fichier
Origin : Files produced by the author(s)
Loading...

Dates and versions

hal-02573610 , version 1 (14-05-2020)

Identifiers

Cite

Safaa Lhadi, Ravi Raj Purohit Purushottam Raj Purohit, Thiebaud Richeton, Nathalie Gey, Stéphane Berbenni, et al.. Elasto-viscoplastic tensile behavior of as-forged Ti-1023 alloy: Experiments and micromechanical modeling. Materials Science and Engineering: A, 2020, 787 (139491), ⟨10.1016/j.msea.2020.139491⟩. ⟨hal-02573610⟩
100 View
126 Download

Altmetric

Share

Gmail Facebook X LinkedIn More