Results 211 to 220 of about 2,776 (254)

Combinatorial Development of Multicomponent Invar Alloys Via Rapid Alloy Prototyping

SSRN Electronic Journal, 2021
To develop novel Invar alloys in the practically infinite compositional space of multicomponent alloys, rapid alloy prototyping is used to investigate five multicomponent Invar alloys with 5 at.% addition of Al, Cr, Cu, Mn and Si to a super Invar alloy (Fe 63 Ni 32 Co 5 ; at.%), respectively.
Rao, Z., Springer, H., Ponge, D., Li, Z.
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Nanobelts in multicomponent aluminum alloys

Applied Physics Letters, 2008
High density of nanobeltlike precipitates has been observed in an Al–Si–Mg–Hf–Y alloy after heat treatments. Quantitative analysis in scanning transmission electron micrscopy (TEM) shows that the precipitates contain Hf, Si, and some Al. The precipitates have an orthorhombic structure which has been revealed by high-resolution TEM and electron ...
Z. H. Jia, L. Arnberg
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Ostwald ripening in multicomponent alloys

Scripta Metallurgica et Materialia, 1993
The widespread use of second-phase dispersions in materials has stimulated the intensive study of the diffusion processes occurring in them at the last stage of a first-order phase transformation, termed Ostwald ripening or coarsening. As a result of the large surface area, the mixture is not in thermodynamic equilibrium. Relaxation of such a system is
A. Umantsev, G.B. Olson
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Irradiation Resistance of Multicomponent Alloys

Metallurgical and Materials Transactions A, 2013
High-entropy alloys (HEAs) are characterized not only by high values of entropy but also by high atomic-level stresses originating from mixing of elements with different atomic sizes. Particle irradiation on solids produces atomic displacements and thermal spikes. The high atomic-level stresses in HEAs facilitate amorphization upon particle irradiation,
T. Egami, W. Guo, P. D. Rack, T. Nagase
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Stable and metastable multicomponent alloys

Annales de chimie Science des Matériaux, 2007
Cet article decrit les principes fondamentaux sur lesquels sont bases les alliages multicomposants stables et metastables, et donne une serie d'exemples. On discute les differents types d'alliages multicomposants et les differentes methodes permettant d'acceder a l'espace des phases a composants multiples.
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Ostwald ripening in multicomponent alloys

Acta Materialia, 2013
Abstract A general theory of coarsening in a multicomponent alloy is developed, accounting for off-diagonal terms in the diffusion tensor. The analysis is valid for a non-ideal and non-dilute solution. The asymptotic analysis reveals that the temporal exponents for the average particle radius, number of particles per volume and both the precipitate ...
T. Philippe, P.W. Voorhees
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Solidification of Multicomponent Alloys

2015
Most commercial casting alloys are multicomponent (three or more) and involve multiphase solidification. Processing objectives include either avoidance of microsegregation associated with the formation of detrimental minority phases, or control of the amount, the morphology, and the distribution of beneficial minority phases.
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Atomic Ordering in Multicomponent Alloys

physica status solidi (b), 1985
AbstractThe pair interaction model of binary alloys is generalized to cover the case of an arbitrary number of components. Both, the interaction radius and the number of short‐ and long‐range ordering parameters are unlimited. The problem is solved by applying the high‐temperature series expansion method, using a new diagram technique, to calculate the
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Dynamic Arrest in Multicomponent Glass-Forming Alloys

Physical Review Letters, 2010
We report radiotracer diffusivities in a Pd43Cu27Ni10P20 melt, presenting for the first time a complete set of data for all components over the whole relevant temperature range. While a vast decoupling of more than 4 orders of magnitude is observed between the diffusivity of Pd and of the smaller components, at the glass transition temperature Tg, the ...
Bartsch, A., Rätzke, K., Meyer, A., Faupel, F.   +3 more
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Nanophases of binary and multicomponent alloys

Acta Materialia, 2013
Abstract I present a theory which explains the appearance of an amorphous-like, disordered phase in nanoparticles of binary alloys. The theory claims that this phase represents a transition state between two bulk phases of the binary system. While the transition state is completely unstable in the conditions of an open system, where exchange of the ...
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