Unified description of the softening behavior of beta-metastable and alpha plus beta titanium alloys during hot deformation - Université de Lorraine Accéder directement au contenu
Article Dans Une Revue Materials Science and Engineering: A Année : 2016

Unified description of the softening behavior of beta-metastable and alpha plus beta titanium alloys during hot deformation

Résumé

In this work, we propose a unified description of the softening behavior of a beta metastable alloy and Ti6Al4V alloy. In the first part we provide sound evidence that the hot deformation of Ti6Al4V of the beta phase above and below the beta transus temperature takes place solely by dynamic recovery at moderate strains, similarly to the behavior of the Ti5Al5Mo5V3Cr1Zr near-beta alloy. This study was possible due to the combination of the fast cooling rates achieved after controlled hot deformation and the reconstruction of the parent beta phase from electron backscattered diffraction measurements of the frozen alpha phase by using an innovative developed algorithm. The dynamic recovery as a common dynamic restoration behavior for Ti6Al4V and Ti5Al5Mo5V3Cr1Zr is described mathematically with a Derby type relationship of the subgrain size and the stress of the beta phase. A rule of mixture allows the determination of the load partition between the two allotropic phases.
Fichier principal
Vignette du fichier
HAL_Poletti et al. - 2016 - Unified description of the softening behavior of b.pdf (7.81 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-01515197 , version 1 (18-02-2020)

Identifiants

Citer

Cecilia Poletti, Lionel Germain, Fernando Warchomicka, Martina Dikovits, Stefan Mitsche. Unified description of the softening behavior of beta-metastable and alpha plus beta titanium alloys during hot deformation. Materials Science and Engineering: A, 2016, 651, pp.280-290. ⟨10.1016/j.msea.2015.10.109⟩. ⟨hal-01515197⟩
147 Consultations
188 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More