Characteristics of stress relaxation kinetics of La60Ni15Al25 bulk metallic glass
Jichao Qiao,Jichao Qiao,Yun-Jiang Wang,Jean-Marc Pelletier,Leon M. Keer,Morris E. Fine,Yao Yao +6 more
TLDR
In this paper, compressive properties and stress relaxation at high temperature (below glass transition temperature T-g) were studied, and it was found that compressive stress relaxation kinetics parameter remains temperature independent.About:
This article is published in Acta Materialia.The article was published on 2015-10-01 and is currently open access. It has received 86 citations till now. The article focuses on the topics: Relaxation (physics) & Stress relaxation.read more
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Metallic glass matrix composites
TL;DR: In this article, the development, fabrication, microstructures, and properties of MGMCs, including the room-temperature, cryogenictemperature and hightemperature mechanical properties upon quasi-static and dynamic loadings are reviewed.
Journal ArticleDOI
Structural heterogeneities and mechanical behavior of amorphous alloys
J.C. Qiao,J.C. Qiao,J.C. Qiao,Q. Wang,Jean-Marc Pelletier,Hidemi Kato,Riccardo Casalini,Daniel Crespo,Eloi Pineda,Yao Yao,Yong Yang +10 more
TL;DR: In this paper, the authors review the recent advances on the understanding of structural heterogeneities in metallic supercooled liquids and the influence of the structural heterogeneity on the overall mechanical properties of the corresponding amorphous alloys.
Journal ArticleDOI
Correlation between Local Structure Order and Spatial Heterogeneity in a Metallic Glass.
Fan Zhu,Fan Zhu,Akihiko Hirata,Pan Liu,Shuangxi Song,Yuan Tian,Jiuhui Han,Takeshi Fujita,Mingwei Chen,Mingwei Chen,Mingwei Chen +10 more
TL;DR: The experimental characterization of the spatial heterogeneity of a metallic glass by utilizing state-of-the-art angstrom-beam electron diffraction and scanning transmission electron microscopy reveals that the nanoscale spatial heterogeneity and corresponding density fluctuation have a close correlation with the local structure variation from icosahedronlike to tetragonal crystal-like order.
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Revealing the structural heterogeneity of metallic glass: Mechanical spectroscopy and nanoindentation experiments
TL;DR: In this article, the structural heterogeneity of a model alloy was investigated and the scale variation of the STZs was revealed based on the cooperative shear model and statistical analysis, and it was shown that the spatial structural heterogeneity can be enhanced by severe plastic deformation which can reduce the energy barrier for STZ activation.
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Transition from stress-driven to thermally activated stress relaxation in metallic glasses
Jichao Qiao,Yun-Jiang Wang,Linlin Zhao,Lanhong Dai,Daniel Crespo,Jean-Marc Pelletier,Leon M. Keer,Yao Yao +7 more
TL;DR: In this paper, the authors reported an anomalous two-stage stress relaxation behavior in a Cu46Zr46Al8 metallic glass over a wide temperature range and generalize the findings in other compositions.
References
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Stabilization of metallic supercooled liquid and bulk amorphous alloys
TL;DR: In this article, the authors investigated the stabilization properties of the supercooled liquid for a number of alloys in the Mg-, lanthanide-, Zr-, Ti-, Fe-, Co-, Pd-Cu- and Ni-based systems.
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Supercooled liquids and the glass transition
TL;DR: Current theoretical knowledge of the manner in which intermolecular forces give rise to complex behaviour in supercooled liquids and glasses is discussed.
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Molecular Transport in Liquids and Glasses
Morrel H. Cohen,David Turnbull +1 more
TL;DR: In this paper, the authors derived a relation between the diffusion constant D in a liquid of hard spheres and the free volume vf, which is based on the concept that statistical redistribution of free volume occasionally opens up voids large enough for diffusive displacement.
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Mechanical behavior of amorphous alloys
TL;DR: In this paper, a review of recent advances in understanding the mechanical behavior of metallic glasses, with particular emphasis on the deformation and fracture mechanisms, is presented, where the role of glass structure on mechanical properties, and conversely, the effect of deformation upon glass structure, are also described.
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A microscopic mechanism for steady state inhomogeneous flow in metallic glasses
TL;DR: In this paper, an empirical deformation map for metallic glasses is introduced and the two modes of deformation, homogeneous and inhomogeneous flow, are reviewed, based on a dynamic equilibrium between stress-driven creation and diffusional annihilation of structural disorder.