Creep properties of coarse-grained Al(Sc) alloys at 300 C

Journal Article · Fri Feb 19 04:00:00 EST 1999 · Scripta Materialia

DOI:https://doi.org/10.1016/S1359-6462(98)00468-0· OSTI ID:335281

Fuller, C B; Seidman, D N; Dunand, D C ^[1]

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1. Northwestern Univ., Evanston, IL (United States). Dept. of Materials Science and Engineering

Most precipitation-strengthened aluminum alloys currently being used are limited to relatively low temperature usage, because of the dissolution and/or rapid coarsening of their precipitates. Two-phase Al(Sc) alloys represent an exception, because they contain very fine coherent cuboidal Al{sub 3}Sc precipitates, faceted on {l_brace}100{r_brace} planes, with a melting temperature of 1,320 C and very low coarsening rates. Much of the recent work on high temperature mechanical properties of Al(Sc) alloys has focused on diffusional creep and superplastic deformation with fine recrystallized grains. The purpose of this report is to explore the dislocation creep behavior of coarse-grained binary Al(Sc) alloys and to discuss the strengthening effect of the Al{sub 3}Sc phase.

• OSTI ID: 335281
• Journal Information: Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 6 Vol. 40; ISSN 1359-6462; ISSN SCMAF7
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM
CREEP
DISLOCATIONS
INTERMETALLIC COMPOUNDS
MICROSTRUCTURE
PRECIPITATION
SAMPLE PREPARATION
SCANDIUM ADDITIONS