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Titolo:
Bulk nanostructured multicomponent alloys
Autore:
Eckert, J; Reger-Leonhard, A; Weiss, B; Heilmaier, M; Schultz, L;
Indirizzi:
IFW Dresden, Inst Met Werkstoffe, D-01171 Dresden, Germany IFW Dresden Dresden Germany D-01171 Werkstoffe, D-01171 Dresden, Germany
Titolo Testata:
ADVANCED ENGINEERING MATERIALS
fascicolo: 1-2, volume: 3, anno: 2001,
pagine: 41 - 47
SICI:
1438-1656(200101)3:1-2<41:BNMA>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
SUPERCOOLED LIQUID REGION; AL-CU-NI; METALLIC-GLASS COMPOSITES; MECHANICAL-PROPERTIES; PARTICLES; BEHAVIOR; PRECIPITATION; DEFORMATION; MATRIX; CO;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
33
Recensione:
Indirizzi per estratti:
Indirizzo: Eckert, J IFW Dresden, Inst Met Werkstoffe, Postfach 27 00 16, D-01171 Dresden, Germany IFW Dresden Postfach 27 00 16 Dresden Germany D-01171 , Germany
Citazione:
J. Eckert et al., "Bulk nanostructured multicomponent alloys", ADV ENG MAT, 3(1-2), 2001, pp. 41-47

Abstract

Bulk nanostructured composite materials can be obtained by partial devitrification of slowly cooled bulk glass-forming multicomponent metallic glasses or by blending a glassy matrix alloy with insoluble second-phase particles by solid state processing. Their properties are discussed with respect tothe effect of the second phases on the thermal stability and on the mechanical properties at room temperature as well as at temperatures around the glass-transition temperature, T-g. Microhardness measurements at room temperatures reveal a substantial increase in the hardness of the composites because of the uniform distribution of nanoscale particles in the glossy matrix. Also, there is a significant increase in yield strength with increasing volume fraction of particles. At elevated temperatures around T-g volume fractions of up to 40 vol-% of nanoscaled particles yield no significant change in strength as compared with the particle-free material, but the deformation behavior of the composites is mainly controlled by the Newtonian viscous flow of the glassy matrix phase. This easy-flow behavior opens a promising route for shaping complex parts of bulk nanostructured composites derivedfrom metallic glasses at moderate temperatures and high strain rates.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 13/07/20 alle ore 17:10:40