THE ROLE OF LIQUID-PHASE IN CAVITATION IN A SI3N4P AL-MG-SI COMPOSITEEXHIBITING HIGH-STRAIN-RATE SUPERPLASTICITY/

Authors
IWASAKI H MABUCHI M HIGASHI K
Citation
H. Iwasaki et al., THE ROLE OF LIQUID-PHASE IN CAVITATION IN A SI3N4P AL-MG-SI COMPOSITEEXHIBITING HIGH-STRAIN-RATE SUPERPLASTICITY/, Acta materialia, 45(7), 1997, pp. 2759-2764
Citations number
34
Categorie Soggetti
Material Science","Metallurgy & Metallurigical Engineering
Journal title
Acta materialia → ACNP
ISSN journal
13596454
Volume
45
Issue
7
Year of publication
1997
Pages
2759 - 2764
Database
ISI
SICI code
1359-6454(1997)45:7<2759:TROLIC>2.0.ZU;2-V
Abstract
Cavitation was quantitatively investigated at 8 MPa and 833 K for a hi gh-strain-rate superplastic Si3N4p/Al-Mg-Si composite, where the testi ng temperature of 833 K was slightly above the onset temperature for p artial melting. Most of the cavities were very small (less than or equ al to 1 mu m), and cavity development was not significant. Based on a theoretical analysis, when stress concentrations around reinforcements are relaxed by the presence of a liquid phase, excessive cavity devel opment is suggested to be limited. This view is in agreement with the experimental results. (C) 1997 Acta Metallurgica Inc.