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An Analysis of Random Pits in Corrosion Fatigue
Y. Hashimoto
T. Hisada
H. Kitagawa
K. Tsuji
其他書名
A Statistical Three-Dimensional Evaluation of an Irregularly Corroded Surface
出版
ASTM International
, 1983
URL
http://books.google.com.hk/books?id=T0B6zgEACAAJ&hl=&source=gbs_api
註釋
A method of statistical evaluation based on two-dimensional spectral analysis is proposed for quantitative determination of irregular configurations of an unnotched surface subjected to corrosion fatigue. For the practical use of the spectral analysis new parameters ?A, ?B, and ?2 are used. These parameters, which characterize the autocorrelation function, correspond to the standard deviation of the surface irregularity, mean depth of the corroded surface, and pit size respectively. The method was applied to unnotched smooth specimens made of structural steel and subjected to fatigue in hydrochloric acid. The specimen surface was covered with many randomly distributed pits. From the results of the analysis, it has been made quantitatively clear that increases in the cyclic stress level or the number of load cycles bring about corrosion pits on the surface.
