Observation of martensite phase transformation in shape memory alloys using a combined XRD-DIC technique

Xuyang Chang (1) , Karine Lavernhe-Taillard (1) , Olivier Hubert (1)

1 LMT - Laboratoire de Mécanique et Technologie

Shape memory alloys (SMA), Ni-Ti alloy for example, have widely industrial applications because of their super-elasticity or shape memory properties. However, the potential coexistence of three principal phases (Austenite, Martensite, and R phase) depending on the various thermo-mechanical loading conditions thus exhibiting different transformation deformation, makes further industrial applications a difficult task. For any tentative of multi-axial modeling validation, it appears relevant to get an estimation of strain field correlated with the local volume fraction of phases during a mechanical test. Combined DIC-XRD observation has been carried out for that purpose.

Mots clés: Digital Images Correlation; X-ray diffraction; Shape-Memory Alloys

Domaines: Mécanique des matériaux [physics.class-ph]

Xuyang Chang, Karine Lavernhe-Taillard, Olivier Hubert. Observation of martensite phase transformation in shape memory alloys using a combined XRD-DIC technique. ESOMAT 2018 11th European Symposium on Martensitic Transformations, Aug 2018, Metz, France. ⟨hal-01889571⟩