Anisotropic grain boundary area and energy distributions in tungsten

• DOI: 10.1016/j.scriptamat.2021.114384
• Publication Date: 2021-11-17T05:00:44Z
• Authors: Ooraphan Chirayut...; Rajchawit Sarocha...; Apiwat Wisitsorasak; Nopporn Rujisamphan; Timofey Frolov; Tomas Oppelstrup; Somsak Dangtip; Gregory S. Rohrer; Sutatch Ratanaphan
• Keywords: 0205 materials engineering; 02 engineering and technology; 0210 nano-technology

Describing microstructure evolution in nanocrystalline tungsten requires a quantitative description of the anisotropic grain boundary energy. We present a grain boundary energy function for tungsten that specifies the energy of an arbitrary boundary given its five macroscopic crystallographic parameters. A comparison of measured grain boundary areas and the grain boundary energies given by the function at the Σ11, Σ17b, and Σ33a mis-orientations, which are problematic to determine by measurement or atomistic calculations, reveals inverse correlations that are similar to what have been observed in microcrystalline metals.