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Type van Dalen, M.E.; Seidman, D.N.; Dunand, D.C.
  Publication Creep- and coarsening properties of Al-0.06 at.% Sc-0.06 at.% Ti at 300-450 °C Volume Journal Article
Pages 2008
  Abstract Acta Materialia  
  Corporate Author  
Publisher 56  
Editor 16
  Summary Language 4369-4377 Series Editor Aluminum alloys; Nanostructure; Precipitation; Creep; Titanium; Al-Sc  
Abbreviated Series Title Upon aging at 300-450 °C, nanosize, coherent Al3(Sc1-xTix) precipitates are formed in pure aluminum micro-alloyed with 0.06 at.% Sc and 0.06 at.% Ti. The outstanding coarsening resistance of these precipitates at these elevated temperatures (61-77% of the melting temperature of aluminum) is explained by the significantly smaller diffusivity of Ti in Al when compared to that of Sc in Al. Furthermore, this coarse-grained alloy exhibits good compressive creep resistance for a castable, heat-treatable aluminum alloy: the creep threshold stress varies from 17 MPa at 300 °C to 7 MPa at 425 °C, as expected if the climb bypass by dislocations of the mismatching precipitates is hindered by their elastic stress fields.
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no NU @ m-krug @ 10486
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