Elastic deformation behaviors of as-cast and annealed eutectic and hypoeutectic Zr–Cu–Al bulk metallic glasses (BMG) were investigated on a basis of different strain-scales, determined by X-ray scattering and the strain gauge. The microscopic strains determined by Direct-space method and Reciprocal-space method were compared with the macroscopic strain measured by the strain gauge, and the diff...

Abstract The corrosion behavior of TiZrHfBeCu(Ni) high-entropy bulk metallic glasses (HE-BMGs) has been investigated. HE-BMGs exhibited high resistance in 3.5 wt. % NaCl solution because accumulation ZrO 2 and TiO the passive film. Ni promoted increases , HfO contents a decrease BeO content, which improved HE-BMG behavior. Compared with Zr 41.2 Ti 13.8 10 Cu 12.5 Be 22.5 BMG, effect can signifi...

Ingots of the bulk metallic glass (BMG), Zr64.13Cu15.75Ni10.12Al10 in atomic percent (at. %), are compressed at slow strain rates. The deformation behavior is characterized by discrete, jerky stress-drop bursts (serrations). Here we present a quantitative theory for the serration behavior of BMGs, which is a critical issue for the understanding of the deformation characteristics of BMGs. The me...

Superplastic forming (SPF) is introduced in this article as a net-shape processing method for bulk metallic glasses (BMGs), commercially known as Liquidmetal® alloys. This method decouples fast cooling and forming of the BMG. Forming takes place in the supercooled liquid region, where the BMG exists as a highly viscous liquid and increases its fl uidity with increasing temperature. The SPF meth...

Tailoring the intrinsic length-scale effects in bulk metallic glasses (BMGs) via post-heat treatment necessitates a systematic analyzing strategy. Although various achievements were made in the past years to structurally enhance the properties of different BMG alloys, the influence of short-term sub-glass transition annealing on the relaxation kinetics is still not fully covered. Here, we aim f...

Remarkable tensile ductility was first obtained in an in-situ Ti-based bulk metallic glass (BMG) composite at cryogenic temperature (77 K). The novel cryogenic tensile plasticity is related to the effective accommodation of ductile body-centered cubic dendrites at 77 K, characteristic of the prevailing slip bands and dislocations, as well as lattice disorder, which can effectively hinder the pr...

The long-standing challenge for forming Al-based BMGs and their matrix composites with a critical size larger than 1 mm have not been answered over the past three decades. In this paper, we reported formation of a series of BMG matrix composites which contain a high Al content up to 55 at.%. These composites can be cast at extraordinarily low cooling rates, compatible with maximum rod diameters...

In this work, the long-term thermal stability, dynamic relaxation behavior, and mechanical performance of (La60Ce40)60Al15Co25 bulk metallic glass (BMG) were studied using differential scanning calorimetry, internal friction measurement, compression testing, respectively. The stability LaCe-based BMG was realized by constructing a continuous heating transformation diagram on basis kinetic chara...

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...