In-situ observations of a hierarchical twinning–detwinning process in stress-induced α″-martensite of Ti-12Mo alloy - Chimie ParisTech Accéder directement au contenu
Article Dans Une Revue Materials Research Letters Année : 2022

In-situ observations of a hierarchical twinning–detwinning process in stress-induced α″-martensite of Ti-12Mo alloy

Résumé

Beyond classic martensitic transformation-induced plasticity (TRIP), consecutive hierarchical twinning in the primary martensite is observed providing additional tensile strain about two-to-three times higher than the original transformation strain. The hierarchical twinning, operating in two different modes, contributes to at least one quarter of the plasticity in TRIP/TWIP Ti-12Mo alloy at early deformation stage. During tensile unloading, a peculiar multi-step detwinning process reverses the mechanically twinned martensite to its original orientation, resulting in rubber-like behavior. The complex reversible twinning process is investigated by combining in-situ EBSD/TEM experiments and theoretical rationalization with respect to Schmid factors and twin variant selection.

Domaines

Chimie
Fichier principal
Vignette du fichier
21663831.2021.pdf (2.44 Mo) Télécharger le fichier
Origine : Publication financée par une institution

Dates et versions

hal-03542926 , version 1 (25-01-2022)

Identifiants

Citer

Bingnan Qian, Min Yang, Lola Lilensten, Philippe Vermaut, Fan Sun, et al.. In-situ observations of a hierarchical twinning–detwinning process in stress-induced α″-martensite of Ti-12Mo alloy. Materials Research Letters, 2022, 10 (2), pp.45 - 51. ⟨10.1080/21663831.2021.2013967⟩. ⟨hal-03542926⟩
27 Consultations
21 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More