Influence of spherical particles and interfacial stress distribution on viscous flow behavior of Ti‐Cu‐Ni‐Zr‐Sn bulk metallic glass composites

• Published in: Intermetallics Vol. 91; pp. 90 - 94
• Main Authors: Hong, Sung Hwan, Kim, Jeong Tae, Mun, Sang Chul, Kim, Young Seok, Park, Hae Jin, Na, Young Sang, Lim, Ka Ram, Park, Jin Man, Kim, Ki Buem
• Format: Journal Article
• Language: English
• Published: Barking Elsevier Ltd 01.12.2017; Elsevier BV
• Subjects: A. Metallic glasses; Amorphous materials; B. Thermal properties; Copper; Crystallization; D. Interfaces; Deformation; Deformation mechanisms; E. Finite-element modeling; Interfacial stresses; Metallic glasses; Nickel; Particulate composites; Shear stress; Strain; Strain distribution; Stress concentration; Stress distribution; Tin; Titanium; Viscosity; Viscous flow; Zirconium base alloys; Viscosity; A. Metallic glasses; D. Interfaces; E. Finite-element modeling; B. Thermal properties
• ISSN: 0966-9795; 1879-0216
• DOI: 10.1016/j.intermet.2017.08.016

Bulk metallic glass composites containing micro-scale B2 particles are subject to investigation with regards to the influence of B2 particles and interfacial stress and strain distribution on the viscous flow behavior at a super-cooled liquid state. An increased volume fraction of B2 particles leads to an increase of minimum viscosity and influences viscous flow behavior before crystallization. In high temperature deformation, the bulk metallic glass shows homogeneous deformation feature. However, the heterogeneous deformation feature is found in thermoplastically deformed bulk metallic glass composite. The strong stain accumulation and sluggish viscous flow occur around B2 particles, which are caused by the heterogeneous stress distribution linked to stress concentration and shear stress impediment around B2 particles. The sluggish viscous flow of super-cooled liquids around B2 particles during high temperature deformation induces an increase of viscosity and strongly affects the viscous flow behavior of Ti-based bulk metallic glass composites containing micro-scale spherical B2 particles. [Display omitted] •An increase in the amount of B2 particles increases of viscosity at SLR of BMGCs.•Heterogeneous stress distribution occur around B2 particle at high temperature.•Sluggish viscous flow occurs around B2 particles by shear stress impediment.•The sluggish viscous flow strongly influences viscous flow behavior of BMGCs.