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Titolo:
THE ROLE OF MICROSTRUCTURE ON STRENGTH AND DUCTILITY OF HOT-EXTRUDED MECHANICALLY ALLOYED NIAL
Autore:
DOLLAR M; DYMEK S; HWANG SJ; NASH P;
Indirizzi:
IIT,DEPT MET & MAT ENGN CHICAGO IL 60616 UNIV TSUKUBA,INST MAT SCI TSUKUBA JAPAN STANISLAW STASZIC UNIV MIN & MET,DEPT MET PL-30059 KRAKOW POLAND
Titolo Testata:
Metallurgical transactions. A, Physical metallurgy and materials science
fascicolo: 9, volume: 24, anno: 1993,
pagine: 1993 - 2000
SICI:
0360-2133(1993)24:9<1993:TROMOS>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
B2 NICKEL ALUMINIDES; DISLOCATION CLIMB; HARD PARTICLES; GRAIN-SIZE; TEMPERATURES; DEFORMATION; DISPERSOIDS; TRANSITION; BRITTLE; TENSILE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
51
Recensione:
Indirizzi per estratti:
Citazione:
M. Dollar et al., "THE ROLE OF MICROSTRUCTURE ON STRENGTH AND DUCTILITY OF HOT-EXTRUDED MECHANICALLY ALLOYED NIAL", Metallurgical transactions. A, Physical metallurgy and materials science, 24(9), 1993, pp. 1993-2000

Abstract

Mechanical alloying followed by hot extrusion has been used to produce very fine-grained NiAl-based alloys containing oxide dispersoids. The dispersoids affect the progress of recrystallization during hot extrusion and contribute to the preservation of the [110] deformation fiber texture. The [110] texture enables the activation of {110} (100) and{110} [110] slip systems. The occurrence of [100] and [110] slip dislocations satisfies the von Mises criterion for general plasticity and is postulated to contribute to notable room-temperature compressive ductility of the mechanically alloyed (MA) materials. Another factor likely affecting the compressive ductility is the predominant occurrence of low-angle grain boundaries. The attractive dislocation-dispersoid interactions lead to a ductility trough observed at 800 K in the MA materials. The MA NiAl materials are strong at both ambient and elevated temperatures due to fine grain and the presence of dispersoids and interstitial atoms.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/11/20 alle ore 09:08:49