Effects of the non-Newtonian deformation on the crystallization behavior in a Cu-based bulk metallic glass

• Published in: Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2013-12, Vol.586, p.53-56
• Main Authors: Tan, C.G., Tian, Y.B., Li, W., Lin, J.G.
• Format: Article
• Language: English
• Subjects: Applied sciences; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Deformation; Equations of state, phase equilibria, and phase transitions; Exact sciences and technology; Glasses (including metallic glasses); Martensitic transformations; Materials science; Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology; Metallic glass; Metals. Metallurgy; Phase diagrams and microstructures developed by solidification and solid-solid phase transformations; Physics; Solid-solid transitions; Specific materials; Specific phase transitions
• ISSN: 0921-5093; 1873-4936
• DOI: 10.1016/j.msea.2013.07.069

The effects of non-Newtonian plastic deformation of a Cu-based amorphous alloy (Cu50Zr50)92Al8 in the super cooled liquid region on the isothermal crystallization behavior and mechanical properties of the amorphous alloy were investigated. The results showed that the non-Newtonian deformation could promote the isothermal crystallization process of the alloy, and the main isothermal crystallization products were the CuZr phase with a cubic structure (B2 phase) and its Martensitic phase. The alloy after the non-Newtonian deformation and the isothermal annealing exhibited a yielding point at the initial stage of deformation on its compression stress–strain curve, which may be caused by the stress induced martensite transformation.