Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
MICROSTRUCTURE CONTROL AND DUCTILITY IN NI3AL POLYCRYSTALS
Autore:
HANADA S; WATANABE S; KIM WY; MASAHASHI N; KIM MS;
Indirizzi:
TOHOKU UNIV,INST MAT RES,2-1-1 KATAHIRA SENDAI MIYAGI 98077 JAPAN NIPPON STEEL CORP LTD,RES & DEV LABS 1 KAWASAKI KANAGAWA 211 JAPAN INHA UNIV,DEPT MET ENGN INCHON 402751 SOUTH KOREA
Titolo Testata:
Materials science & engineering. A, Structural materials: properties, microstructure and processing
, volume: 240, anno: 1997,
pagine: 309 - 316
SICI:
0921-5093(1997)240:<309:MCADIN>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
ENVIRONMENTAL EMBRITTLEMENT; ORDERED ALLOYS; FRACTURE;
Keywords:
NI3AL; MICROSTRUCTURE CONTROL; DYNAMIC RECRYSTALLIZATION; DUCTILITY;
Tipo documento:
Article
Natura:
Periodico
Citazioni:
18
Recensione:
Indirizzi per estratti:
Citazione:
S. Hanada et al., "MICROSTRUCTURE CONTROL AND DUCTILITY IN NI3AL POLYCRYSTALS", Materials science & engineering. A, Structural materials: properties, microstructure and processing, 240, 1997, pp. 309-316

Abstract

Equiaxed Ni3Al polycrystals at different impurity levels were prepared via isothermal forging and ductility at ambient temperature was measured in oxygen as a function of alloy composition and impurity content. Microstructures of single phase Ni3Al with stoichiometric and off-stoichiometric compositions were controlled by dynamic recrystallizationoccurring during isothermal forging. Dynamically recrystallized grainsize increases with increasing deformation temperature and with decreasing strain rate. Grain boundary sliding takes place between dynamically recrystallized grains with a small grain size. Binary Ni3Al polycrystals exhibit appreciable ductilities even at the stoichiometric composition. Ductility is further increased by a deviation from the stoichiometric composition to the Ni-rich compositions. Ductilities of the Ni-rich Ni3Al polycrystals are increased by zone-refining starting material in UHV. It is concluded that polycrystalline Ni3Al is intrinsically ductile and its ductility is increased at Ni-rich compositions. (C)1997 Elsevier Science S.A.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/09/20 alle ore 21:16:01