Evolution of the amorphous structure in melt-spun Ti50Ni25Cu25 alloy subjected to high pressure torsion deformation

• DOI: 10.1016/j.intermet.2015.06.013
• Publication Date: 2015-07-06T21:16:10Z
• Authors: D.V. Gunderov; V.Yu. Slesarenko; A.A. Churakova; А.V. Lukyanov; E.P. Soshnikova; V.G. Pushin; R.Z. Valiev
• Keywords: 02 engineering and technology; 0210 nano-technology

Abstract Peculiarities of structure and mechanical behaviour of amorphous Ti 50 Ni 25 Cu 25 alloy were the focus of this research. The melt-spun ribbons of amorphous Ti 50 Ni 25 Cu 25 were subjected to high pressure torsion (HPT) at temperatures of 20–150 °C in order to modify their structure and mechanical behaviour. Some features of obtained HPT-processed samples were compared with initial state with the help of x-ray diffraction (XRD), transmission electron microscopy (TEM) and nanohardness testing. Analysis of structural data and mechanical behaviour allowed us to assume that severe plastic deformation (SPD) processing of melt-spun Ti 50 Ni 25 Cu 25 alloy might lead to the formation of the structure similar to the new kind of noncrystalline state – “nanoglass” state.