Age hardening of 6061/alumina-silica fiber composite

Book · Sat Dec 31 00:00:00 EST 1994

OSTI ID:62985

Khangaonkar, P R; Shamsul, J B; Azmi, R ^[1]

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1. Univ. Sains Malaysia, Tronoh (Malaysia)

Continuous alumina-silica fiber (Altex of Sumitomo) which yields high performance composites with some aluminium alloys was tried for squeeze cast 6061 based composites with volume fractions of 0.5 and 0.32, and the matrix microhardness and resistivity changes during age hardening were studied. The matrix in the composites hardened much more than the unreinforced alloy. Microhardness increases of up to 70 VPN above the solution treated condition at various aging temperatures were observed. The resistivity variation indicated an appreciable state of internal stress which continued to persist even when hardness fell by overaging. Energy dispersive X-ray analysis indicated that the regions close to the fibers had a higher silicon content than the matrix, and amorphous silica in the fiber may have a role in the formation of an enriched layer which may help the bonding and strength in the composite.

• OSTI ID: 62985
• Report Number(s): CONF-941016-; ISBN 0-87339-247-7; TRN: IM9527%%36
• Resource Relation: Conference: Materials week `94, Rosemont, IL (United States), 3-7 Oct 1994; Other Information: PBD: 1994; Related Information: Is Part Of High performance composites: Commonalty of phenomena; Chawla, K.K. [ed.] [New Mexico Inst. of Mining and Technology, Socorro, NM (United States)]; Liaw, P.K. [ed.] [Univ. of Tennessee, Knoxville, TN (United States)]; Fishman, S.G. [ed.] [Office of Naval Research, Arlington, VA (United States)]; PB: 549 p.
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMPOSITE MATERIALS
AGE HARDENING
MICROHARDNESS
ELECTRIC CONDUCTIVITY
ALUMINIUM BASE ALLOYS
ALUMINIUM OXIDES
SILICON OXIDES
SILICON ADDITIONS
IRON ADDITIONS
COPPER ADDITIONS
MAGNESIUM ADDITIONS
CHROMIUM ADDITIONS
CASTING
TEMPERATURE DEPENDENCE
INTERMETALLIC COMPOUNDS
INTERFACES
EXPERIMENTAL DATA