Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Superplastic deformation mechanism in powder metallurgy magnesium alloys and composites
Autore:
Watanabe, H; Mukai, T; Mabuchi, M; Higashi, K;
Indirizzi:
Osaka Municipal Tech Res Inst, Joto Ku, Osaka 5368553, Japan Osaka Municipal Tech Res Inst Osaka Japan 5368553 , Osaka 5368553, Japan Natl Ind Res Inst Nagoya, Kita Ku, Nagoya, Aichi 4628510, Japan Natl Ind Res Inst Nagoya Nagoya Aichi Japan 4628510 Aichi 4628510, Japan Univ Osaka Prefecture, Dept Met & Mat Sci, Sakai, Osaka 5998531, Japan Univ Osaka Prefecture Sakai Osaka Japan 5998531 kai, Osaka 5998531, Japan
Titolo Testata:
ACTA MATERIALIA
fascicolo: 11, volume: 49, anno: 2001,
pagine: 2027 - 2037
SICI:
1359-6454(20010622)49:11<2027:SDMIPM>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
STRAIN-RATE SUPERPLASTICITY; MATRIX COMPOSITES; DIFFUSIONAL CREEP; THRESHOLD STRESS; LOW-TEMPERATURE; VORTEX METHOD; FLOW; ACCOMMODATION; ZK60/SIC/17P; RELAXATION;
Keywords:
superplasticity; mechanical properties; constitutive equations; alloys; powder consolidation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
54
Recensione:
Indirizzi per estratti:
Indirizzo: Watanabe, H Osaka Municipal Tech Res Inst, Joto Ku, 1-6-50 Morinomiya, Osaka 5368553, Japan Osaka Municipal Tech Res Inst 1-6-50 Morinomiya Osaka Japan 5368553
Citazione:
H. Watanabe et al., "Superplastic deformation mechanism in powder metallurgy magnesium alloys and composites", ACT MATER, 49(11), 2001, pp. 2027-2037

Abstract

The parametric dependencies for superplastic flow in powder metallurgy (PM) magnesium alloys and composites were characterized so as to elucidate thedeformation mechanism. The mechanism was proposed to be slip accommodated grain boundary sliding. However, the PM alloys and composites were strengthened at low temperatures below similar to 550K. This was different from thecase in ingot metallurgy (IM) magnesium alloys, that behaved identically over a wide range of temperatures. The critical strain rate, below which theeffect of intragranular particle is lost, was developed by considering thedislocation-particle interaction during slip accommodation process. It wassuggested that the diffusional relaxation around the intragranular oxide particles was not completed during the slip accommodation process at low temperatures, and this caused the dislocation pile-up at the intragranular particles. II was expected that the dislocation pile-up at the intragranular particles would contribute to the strengthening at low temperatures in PM alloys and PM composites. (C) 2001 Acta Materialia Inc. Published by ElsevierScience Lid. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/09/20 alle ore 04:38:32