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      Tuning ideal tensile strengths and intrinsic ductility of bcc refractory alloys.

      1 , 1
      Physical review letters
      American Physical Society (APS)

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          Abstract

          An important theoretical ductility criterion for group V and VI metal-based refractory alloys in body-centered cubic (bcc) lattices is the mechanical failure mode of their perfect crystals under tension along the weakest direction [100]. Pure Mo and W fail by cleavage and are deemed intrinsically brittle. However, first-principles calculations show that alloying with group IV or V transition metals can transform these materials into ones that display intrinsically ductile behavior, failing in shear under [100] tension. Remarkably, this transition can be understood as an electron filling effect with the intrinsically ductile response the manifestation of a Jahn-Teller distortion.

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          Author and article information

          Journal
          Phys Rev Lett
          Physical review letters
          American Physical Society (APS)
          1079-7114
          0031-9007
          Mar 21 2014
          : 112
          : 11
          Affiliations
          [1 ] Department of Materials Science and Engineering, University of California, Berkeley, California 94720, USA.
          Article
          10.1103/PhysRevLett.112.115503
          24702389
          4322db13-0a6e-405b-9dd0-88c3fa4b9cca
          History

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