In this research, Zr55Cu30Al10Ni5 bulk metallic glass (BMG) alloy is used as the base material to form tungsten fiber reinforced BMG composites. The composites are synthetized using melt infiltration casting method and their microstructure compressive properties investigated. Two different times of 10 min 15 produce microstructural evaluation interface between matrix reveals that a narrow react...

The glass-forming ability (GFA) and thermal stability of (Zr65Al7:5Cu27:5)100 xTix (x 1⁄4 0 15; in at%) alloys have been investigated. It was revealed that a certain amount of Ti addition could improve the GFA of Zr65Al7:5Cu27:5 alloy effectively. The best bulk metallic glass (BMG) forming composition was found at (Zr65Al7:5Cu27:5)93Ti7. Bulk glassy samples with diameter of 7mm were made by mea...

Systematic changes in composition were employed to increase the notch toughness of a variety of Fe-based Bulk Metallic Glasses (BMGs). The Fe50Mn10Mo14Cr4C16B6 BMG possessed very high hardness (e.g. 12GPa) but very low notch toughness (e.g. 5.7MPam) at room temperature, consistent with fracture surface observations of brittle features. Many of the other Fe-BMG variants, created to change the Po...

The negative strain rate sensitivity (SRS) of metallic glasses is frequently observed. However, the physical essence involved still not well understood. In present work, small-angle X-ray scattering (SAXS) and high-resolution transmission electron microscopy (HRTEM) reveal strong structure heterogeneity at nanometer tens scales, respectively, in bulk glass (BMG) Zr64.13Cu15.75Ni10.12Al10 subjec...

This paper introduces bootstrap multigrid methods for solving eigenvalue problems arising from the discretization of partial differential equations. Inspired by full algebraic (BAMG) setup algorithm that includes an AMG eigensolver, it is illustrated how can be simplified case a discretized equation (PDE), thereby developing geometric (BMG) approach. We illustrate numerically efficacy BMG metho...

At low temperatures, monolithic bulk metallic glasses (BMGs) exhibit high strength and large elasticity limits. On the other hand, BMGs lack overall ductility due to highly localized deformation mechanisms. Recent experimental findings suggest that the problem of catastrophic failure by shear band propagation in BMGs can be mitigated by tailoring microstructural features at different length sca...

The Western World proudly considers the Universal Declaration of Human Rights (UDHR) 1948 to be a miracle. But no work mind can ever free from error. Because this manifesto has guidance on rights orphans, issues inheritance, mentally retarded, virtue amnesty, self-defense and abolition force. Is heavenly law or an innovation human intellect which is obviously flawed? In article it discussed lot...

In this work, a new design principle, i.e. doping with refractory metal particles low diffusion rate to prevent the formation of cracks and improve mechanical properties bulk metallic glass (BMG) composites, was put forward. It proven that crack-free dense Mo(p)/Cu47Zr47Al6 BMG composites enhanced can be produced via LPBF. The dislocations generated in Mo release thermal stress, thereby inhibit...

In this work, the fatigue behavior of a low-cost Zr58Cu15.46Ni12.74Al10.34Nb2.76Y0.5 (at%) bulk metallic glass (BMG) fabricated by industrial-grade Zirconium raw material was investigated under three-point bending loading mode. X-ray, tests different stress amplitude and fractography were conducted in order to characterize amorphous structure, stress-life (S-N) curve fracture mechanism, respect...

Study of condensed matter in certain extreme conditions allows one to better understand the mechanisms microscopic structural transformations and develop materials with completely new mechanical properties. In present work, we study structure crystallization kinetics bulk metallic glass (BMG) Ni62Nb38. We show that this BMG is rapidly crystallized under combined effect shear deformation ultrahi...