抄録
We have proposed equations describing the numbers of faces, edges, and corners of a polyhedron-shaped crystal grain in terms of the volume-equivalent grain diameter, and we have developed a method to calculate the grain shape distribution in polycrystalline materials using these equations. We then experimentally confirmed that the proposed equations apply to crystal grains in actual polycrystalline materials and that the grain shape distribution can be calculated accurately using our method.
The present method was used to calculate the grain shape distribution in annealed SUS304 stainless steel. The average numbers of grain faces, edges, and corners were 14, 31, and 19, respectively; and their respective distribution ranges were 4–56, 6–139, and 4–86. The average surface area of the crystal grain per unit volume, the average edge length per unit volume, and the average number of corners per unit volume were 9 mm−1, 61 mm−2, and 175 mm−3, respectively; and their respective ranges were 2–31 mm−1, 6–304 mm−2, and 18–863 mm−3.
