Investigation of compression of SiCw/6061Al composites around the solidus of the matrix alloy

Citation
Gs. Wang et al., Investigation of compression of SiCw/6061Al composites around the solidus of the matrix alloy, MATER CH PH, 70(2), 2001, pp. 164-167
Citations number
16
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
MATERIALS CHEMISTRY AND PHYSICS
ISSN journal
0254-0584 → ACNP
Volume
70
Issue
2
Year of publication
2001
Pages
164 - 167
Database
ISI
SICI code
0254-0584(20010501)70:2<164:IOCOSC>2.0.ZU;2-Z
Abstract
(C)ompression test of SiCw/6061Al at the temperatures around the solidus of matrix alloy has been studied. Compression flow stress increases with incr easing strain late according to a power law sigma = K(epsilon) over dot (m) . At temperatures lower than the solidus of matrix, the m value is 0.32 and the activation energy of deformation is almost the same as that of aluminu m seif-diffusion, indicating a dislocation motion controlled by lattice dif fusion deformation mechanism of the composite. At temperatures slightly hig her than the solidus of the matrix, the rn value is 0.5 and the activation energy of deformation is much higher than that of the self-diffusion of alu minum, indicating a grain boundary and interfacial sliding deformation mech anisms of the composite. (C) 2001 Elsevier Science B.V. All rights reserved .