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Träfflista för sökning "WFRF:(Razumovskiy Vsevolod. I.) srt2:(2008)"

Sökning: WFRF:(Razumovskiy Vsevolod. I.) > (2008)

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1.
  • Razumovskii, I. M., et al. (författare)
  • New generation of Ni-based superalloys designed on the basis of first-principles calculations
  • 2008
  • Ingår i: Materials Science & Engineering. - : Elsevier BV. - 0921-5093 .- 1873-4936. ; 497:1-2, s. 18-24
  • Tidskriftsartikel (refereegranskat)abstract
    • A new approach to the design of Ni-based single crystal superalloys is proposed. It is based on a concept that under given structural conditions, the creep-rupture characteristics of superalloys are mainly determined by interatomic bonding given by the cohesive energy. In order to characterize the individual contribution of each alloying element to the strength properties at high temperature, we introduce a parameter, X, which is the partial molar cohesive energy of an alloy component. This parameter is then obtained in the total energy first-principles calculations for a usual set of alloying elements. We demonstrate that creep-rupture characteristics of alloys indeed correlate with the total gain partial molar cohesive energy due to alloying and find that W, Ta, and Re have the highest values of X, and should therefore play the major role in providing high-temperature strength of superalloys. Based on this finding, we design three new superalloys with a high content of W and show that they have superior creep-rupture properties compared not only with their counterparts with the lower content of W, but also with the best Ru-bearing Ni-based superalloys.
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2.
  • Razumovskiy, Vsevolod I., et al. (författare)
  • Ab initio calculations of elastic properties of Pt-Sc alloys
  • 2008
  • Ingår i: Intermetallics (Barking). - : Elsevier. - 0966-9795 .- 1879-0216. ; 16:8, s. 982-986
  • Tidskriftsartikel (refereegranskat)abstract
    • Elastic properties of substitutionally disordered Pt-rich Pt-Sc alloys and L1(2)-ordered Pt3Sc compound are derived from the first-principles calculations based on the exact muffin-tin orbitals (EMTO) method. We demonstrate that these alloys should exhibit a ductile behavior, which combined with relatively high melting temperature and strong cohesive properties make them a very promising candidate for high-temperature applications.
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