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Yield strength at ambient temperature and creep resistance between 225 and 300 o C were investigated in dilute Al(Sc) alloys containing coherent Al 3 Sc precipitates, which were grown by heat-treatments to radii in the range 1.4-9.6 nm. The dependence of the ambient-temperature yield stress on precipitate size is explained using classical precipitation strengthening theory, which predicts...
A systematic creep study was undertaken for the binary intermetallic Al 3 Sc and the ternary single-phase intermetallic Al 3 (Sc 0.74 X 0.26 ), where X is one of the transition-metals Ti, Y, Zr or Hf. Creep tests were conducted in the temperature range from 673 to 1200<space>K under a constant compressive stress ranging from 30 to...
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