4.3 Article

The correlation between the electron work function and yield strength of metals

Journal

PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
Volume 249, Issue 8, Pages 1517-1520

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssb.201248051

Keywords

electron work function; hardness; Peierls-Nabarro model; yield strength

Funding

  1. Natural Science and Engineering Research Council of Canada

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In this study, an effort is made to establish the correlation between electron work function (EWF) and mechanical properties of metals such as yielding strength and hardness. In general, the intrinsic resistance of metals to plastic deformation depends on their atomic bond strength that is essentially governed by the electron behavior. Based on the PeierlsNabarro model, an intrinsic sixth-power dependence of the yield strength of metals on their EWF is derived. Such a relation can also be extended to hardness. The established correlations are verified by the reported experimental results of transition metals and rare-earth metals.

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