Journal ArticleDOI
Intrinsic plasticity or brittleness of metallic glasses
TLDR
The intrinsic plasticity or brittleness of crystalline metals correlates with the ratio of the elastic shear modulus to the bulk modulus, and when the ratio exceeds a critical value, the metal is brittle as mentioned in this paper.Abstract:
The intrinsic plasticity or brittleness of crystalline metals correlates with the ratio of the elastic shear modulus μ to the bulk modulus B; when the ratio μ/B exceeds a critical value, the metal is brittle. Sufficient data on elastic moduli and toughness are now available to permit an assessment for metallic glasses. We find a similar correlation, with the critical value of μ/B for metallic glasses (0.41–0.43) more sharply defined than for crystalline metals. This critical value applies also for annealing-induced embrittlement of metallic glasses. The clear correlation between mechanical behaviour (plasticity or brittleness) and μ/B assists in understanding flow and fracture mechanisms, and in guiding alloy design to alleviate brittleness of metallic glasses.read more
Citations
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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.
Journal ArticleDOI
Poisson's ratio and modern materials
TL;DR: On the bicentenary of the publication of Poisson's Traité de Mécanique, the continuing relevance of Poissons's ratio in the understanding of the mechanical characteristics of modern materials is reviewed.
Journal ArticleDOI
Designing metallic glass matrix composites with high toughness and tensile ductility
Douglas C. Hofmann,Jin-Yoo Suh,Aaron Wiest,Gang Duan,Mary Laura Lind,Marios D. Demetriou,William L. Johnson +6 more
TL;DR: T titanium–zirconium-based BMG composites with room-temperature tensile ductility exceeding 10 per cent, yield strengths of 1.2–1.5 GPa, K1C up to ∼170 MPa m1/2, and fracture energies for crack propagation as high as G1C ≈ 340 kJ’m-2.2 were reported.
Journal ArticleDOI
Atomic-level structure and structure–property relationship in metallic glasses
Yongqiang Cheng,Evan Ma +1 more
TL;DR: In this article, the authors review the tremendous efforts over the past 50 years devoted to unraveling the atomic-level structure of MGs and the structural origin of their unique behaviors.
Journal ArticleDOI
Metallic glasses as structural materials
Michael F. Ashby,A.L. Greer +1 more
TL;DR: In this article, the potential of metallic glasses as structural materials is assessed and a wide-ranging comparison with conventional engineering materials shows metallic glasses to be restricted to niche applications, but with outstanding properties awaiting wider application, for example in micro electro-mechanical systems devices.
References
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Journal ArticleDOI
XCII. Relations between the elastic moduli and the plastic properties of polycrystalline pure metals
TL;DR: In this paper, the elastic and plastic properties of pure polycrystalline metals are discussed and a systematic relation between shear modulus, Burgers vector and plastic shear strength of metals possessing the same lattice structure is proposed.
Journal ArticleDOI
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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Analysis of Stresses and Strains Near the End of a Crack Traversing a Plate
Book
Fracture of Brittle Solids
TL;DR: In this article, the authors present a unified continuum, microstructural and atomistic treatment of modern day fracture mechanics from a materials perspective, focusing on the basic elements of bonding and microstructure that govern the intrinsic toughness of ceramics.
Journal ArticleDOI
Bulk metallic glasses
W.H. Wang,C. Dong,Chan Hung Shek +2 more
TL;DR: In this article, the authors reviewed the recent development of new alloy systems of bulk metallic glasses and the properties and processing technologies relevant to the industrial applications of these alloys are also discussed.