Grain Size Dependence of Elastic Moduli in Nanocrystalline Tungsten

Figure 3

Ratio between Young’s moduli in bcc nanocrystalline metals and the one of the corresponding single crystal as a function of grain size for calculated values in tungsten (▲), calculated (●) values in α-iron [14], calculated (■) values in Ta [22], and rules of mixture in W (black plain lines) and Fe [14] (grey dashed lines). Rules of mixture were calculated with / = 0.35 for W, / = 0.45, and / = 0.50 for Fe.