Creep properties of Al3Sc and Al3(Sc, X) intermetallics
نویسندگان
چکیده
منابع مشابه
Al(f.c.c.):Al3Sc(L12) INTERPHASE BOUNDARY ENERGY CALCULATIONS
ÐThese calculations assess the applicability of classical nucleation theory to the reaction f.c.c.4 L12 occurring in dilute Al±Sc alloys. The orientation and temperature dependence of the energies of coherent Al(f.c.c.):Al3Sc(L12) interphase boundaries were studied using atomistic simulation and a low temperature expansion (LTE) of the grand potential. Embedded atom method potentials were devel...
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The thermal expansion coefficient of Al3Sc and Al3(Sc0:75X0:25), where X is Ti, Y, Zr or Hf, was measured by dilatometry between 25 and 1000 C. The measured value, ð16 1Þ 10 6 K , is constant between 25 and 900 C and insensitive to alloying element. Good agreement is found with a literature value determined from first-principle cal-
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Aluminum alloys containing Sc are promising materials for high-temperature structural applications due to the high strengthening effect of the Al3Sc (L12 structure) precipitates [1]. Further improvements in strength and nanostructural stability of Al-Sc based alloys are achieved by adding alloying elements, such as Mg, as solid-solution strengtheners. It is important to understand the effects o...
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The microstructure of binary Al3Sc and ternary Al3(Sc1−yXy), where X is one of the transition metals from Group IIIA (Y), IVA (Ti, Zr or Hf) or VA (V, Nb or Ta), was investigated as a function of alloying element concentration for 0.1 y 0.75. Alloys with Group IIIA and IVA additions exhibited a single L12 solid-solution phase with some Kirkendall porosity. At the highest concentration studied, ...
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ژورنال
عنوان ژورنال: Acta Materialia
سال: 2000
ISSN: 1359-6454
DOI: 10.1016/s1359-6454(00)00142-7