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Titolo:
Variant selection in heterogeneous nucleation on defects in diffusional phase transformation and precipitation
Autore:
Furuhara, T; Maki, T;
Indirizzi:
Kyoto Univ, Dept Mat Sci & Engn, Sakyo Ku, Kyoto 6068501, Japan Kyoto Univ Kyoto Japan 6068501 ci & Engn, Sakyo Ku, Kyoto 6068501, Japan
Titolo Testata:
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
fascicolo: 1-2, volume: 312, anno: 2001,
pagine: 145 - 154
SICI:
0921-5093(20010815)312:1-2<145:VSIHNO>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
TRANSMISSION ELECTRON-MICROSCOPE; 2-PHASE STAINLESS-STEEL; PERCENT CR ALLOY; MICROSTRUCTURE DEVELOPMENT; INTERFACIAL STRUCTURE; INTERPHASE BOUNDARY; FERRITE; TI-15V-3CR-3SN-3AL; DEFORMATION; AUSTENITE;
Keywords:
diffusional phase transformation; precipitation; microstructure; crystallography; heterogeneous nucleation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
40
Recensione:
Indirizzi per estratti:
Indirizzo: Furuhara, T Kyoto Univ, Dept Mat Sci & Engn, Sakyo Ku, Yoshida Honmachi, Kyoto 6068501, Japan Kyoto Univ Yoshida Honmachi Kyoto Japan 6068501 068501, Japan
Citazione:
T. Furuhara e T. Maki, "Variant selection in heterogeneous nucleation on defects in diffusional phase transformation and precipitation", MAT SCI E A, 312(1-2), 2001, pp. 145-154

Abstract

In heterogeneous nucleation on lattice defects in the matrix during diffusional phase transformation and precipitation reactions, the variant of product phase with the specific orientation relationship is strongly selected by the nature of the defects. For dislocations, effective accommodation of the transformation strain by the strain field of dislocations occurs, leading to the variant selection in which the direction of the maximum misfit is nearly parallel to the Burgers vector of the dislocations. For high-angle grain boundaries and subgrain boundaries, precipitates tend to select the variant with a low-energy interface (often the parallel close packed planes) inclined at the smallest angle to the grain boundary plane. On the other hand, precipitates that nucleate on the incoherent inclusions embedded in thematrix do not hold any specific orientation relationship with respect to the matrix. It is important to produce many variants locally for the effective refinement of microstructures that improves the mechanical properties ofsteel and titanium alloys. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/07/20 alle ore 15:01:45