日本金属学会誌

J. Japan Inst. Metals, Vol. 52, No. 9 (1988),
pp. 835-842

Influence of Grain Size Distribution on Estimation of Mean Grain Size

Yoshimasa Takayama1, Tatsumi Tozawa1, Hajime Kato1, Norio Furushiro2 and Shigenori Hori2

1Department of Mechanical Systems Engineering, Faculty of Engineering, Utsunomiya University, Utsunomiya
2Department of Materials Science and Engineering, Faculty of Engineering, Osaka University, Suita

Abstract:

The influence of grain size distribution on the estimation of mean grain size has been investigated. A calculation of the mean grain size by the intercept (Heyn's) or the planimetric (Jeffries') method was carried out for a grain structure model. In the model, the grain shape and the grain diameter (equivalent volume diameter) D were reasonably set to be the tetrakai-decahedron and to have a log-normal distribution, respectively.
As the result of the calculation, the following equations are derived for the intercept and the planimetric methods;


(Received 1988/4/28)

Keywords:

grain size, grain size estimation, grain size distribution, grain diameter, log-normal distribution, tetrakaidecahedron, intercept method, planimetric method


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