Počet záznamů: 1  

Ab initio study of compositional trends in solid solution strengthening in metals with low Peierls stresses

  1. 1.
    0450466 - ÚFM 2016 RIV GB eng J - Článek v odborném periodiku
    Ma, D. - Friák, Martin - von Pezold, J. - Neugebauer, J. - Raabe, D.
    Ab initio study of compositional trends in solid solution strengthening in metals with low Peierls stresses.
    Acta Materialia. Roč. 98, OCT (2015), s. 367-376. ISSN 1359-6454. E-ISSN 1873-2453
    Institucionální podpora: RVO:68081723
    Klíčová slova: DFT * alloys * Mg alloys * Ni alloys * Mg basal slip
    Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
    Impakt faktor: 5.058, rok: 2015

    We identify and analyze general trends governing solid solution strengthening in binary alloys containing solutes across the Periodic table using quantum-mechanical calculations. Here we present calculations for the model system of Al binary solid solutions. The identified trends originate from an approximately parabolic dependence of two strengthening parameters to quantitatively predict the solid solution strengthening effect, i.e. the volume and slip misfit parameters. The volume misfit parameter shows a convex behavior as a function of the solute element group number in the periodic table, whereas the slip misfit parameter shows a concave behavior. By analyzing reported data, a similar trend is also found in Ni and Mg (basal slip) binary systems. Hence, these two strengthening parameters are strongly anti-correlated, which can be understood in terms of the Fermi level shift in the framework of free electron model. The chemical trends identified in this study enable a rapid and efficient identification of the solutes that provide optimum solid–solution strengthening. The approach described here may thus serve as basis for ab initio guided metallurgical materials design.
    Trvalý link: http://hdl.handle.net/11104/0251850

     
     
Počet záznamů: 1  

  Tyto stránky využívají soubory cookies, které usnadňují jejich prohlížení. Další informace o tom jak používáme cookies.