Nanocrystallization-induced large room-temperature compressive plastic strain of Ti40Zr25Ni8Cu9Be18 BMG

Jinna Mei (1, 2, 3) , Jean-Louis Soubeyroux (4) , Jean-Jacques Blandin (2) , J.S. Li (3) , H.C. Kou (3) , H.Z. Fu (3) , Lian Zhou (5)

1 CRETA - Consortium de Recherches pour l'Emergence des Technologies Avancées
2 SIMaP - Science et Ingénierie des Matériaux et Procédés
3 State Key Laboratory of Solidification Processing
4 NEEL - MagSup - Magnétisme et Supraconductivité
5 NIN - Northwest Institute for Nonferrous Metal Research

By combining neutron diffraction, high-resolution transmission electron microscopy and thermal analysis measurements, the microstructure of as-cast Ti40Zr25Ni8Cu9Be18 BMG with diameter of 2 mm was identified to be quenched-in nuclei/amorphous matrix. The quenched-in nuclei transform to (Ti,Zr)Be2 nanocrystals with the average size of 4 nm homogeneously distributed into the amorphous matrix during deformation, which could be responsible for the large room-temperature compressive plastic strain, up to 8.0% at a constant strain rate of 5 x 10(-4) s(-1). (C) 2010 Elsevier B.V. All rights reserved.

Mots clés: Nanocrystallization; Plastic strain; Quenched-in nuclei; Microstructure; Titanium alloy; Bulk metallic glass

Domaines: Matériaux

Jinna Mei, Jean-Louis Soubeyroux, Jean-Jacques Blandin, J.S. Li, H.C. Kou, et al.. Nanocrystallization-induced large room-temperature compressive plastic strain of Ti40Zr25Ni8Cu9Be18 BMG. Journal of Alloys and Compounds, 2011, 509 (5), pp.1626-1629. ⟨10.1016/j.jallcom.2010.11.071⟩. ⟨hal-00715125⟩