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	Type	Karnesky, Richard A.; Meng, Liang; Dunand, David C.
	Publication	Strengthening Mechanisms in Aluminum Containing Coherent Al[sub:3]Sc Precipitates and Incoherent Al[sub:2]O[sub:3] Dispersoids	Volume	Journal Article
Pages	2007
	Abstract	Acta Materialia
	Corporate Author	Acta Mater.
Publisher	55
Editor	4
	Summary Language	1299-1308	Series Editor	Metal Matrix Composites; Precipitation; Aluminium Alloys; Creep; Zirconium; Al-Sc
Abbreviated Series Title	Dispersion-strengthened-cast aluminum (DSC-Al), consisting of a coarse-grained aluminum matrix containing two populations of particles (30 vol.% of 300 nm Al₂O₃ incoherent dispersoids and 0.2-0.3 vol.% of 6-60 nm coherent Al₃Sc precipitates), was studied. At ambient and elevated temperatures, both populations of particles contribute to strengthening. At 300 °C, creep threshold stresses are considerably higher than for control materials with a single population of either Al₂O₃ dispersoids or Al₃Sc precipitates. This synergistic effect is modeled by considering dislocations pinned at the departure side of incoherent Al₂O₃ dispersoids (detachment model) and simultaneously subjected to elastic interactions from neighboring coherent Al[sub:3Sc precipitates.
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					no	NU @ karnesky @	1782
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