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Abstract：
The ordering behavior and the mechanical properties of the doped L12 type Al3Sc-based intermetallics were studied by sublattice model supported by first-principles calculations. The results show that the intermetallics Al3Sc is a fully ordered intermetallics, where Al atoms always occupy the 3c sublattice and Sc atoms always occupy the 1a sublattice. L12-Al3(Sc0.75M0.25) intermetallics (where M=Y, Ti, Zr and Hf) is a fully ordered intermetallics, where M always occupies the 1a sublattice. The site preference of these alloying elements is independent of the heat treatment temperature. L12-Al3(Sc0.75M0.25) intermetallics satisfy the mechanical stability conditions. The shear modulus, elastic modulus, Young＇s modulus and the hardness of L12-Al3(Sc0.75Y0.25) intermetallics are smaller than those of L12-Al3Sc. While the shear modulus, elastic modulus, Young＇s modulus and the hardness of L12-Al3(Sc0.75M0.25) intermetallics, where M=Ti, Zr or Hf, decrease with increasing the atomic radius. L12-Al3(Sc0.75Ti0.25) has the best plasticity and toughness compared with other L12-Al3(Sc0.75M0.25). © 2019, Science Press. All right reserved.
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Rare Metal Materials and Engineering
ISSN： 1002-185X
CN： 61-1154/TG
Year： 2019
Issue： 3
Volume： 48
Page： 879-884
0 . 4 8 5
JCR@2019
0 . 6 0 0
JCR@2023
ESI Discipline： MATERIALS SCIENCE;
ESI HC Threshold：236
JCR Journal Grade：4
CAS Journal Grade：4
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ESI Highly Cited Papers on the List： 0 Unfold All
WanFang Cited Count：
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30 Days PV： 2
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