キャビテーション気泡崩壊圧による塑性変形挙動 : マグネシア単結晶を用いた基礎的研究

概要

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A magnesium oxide single crystal has simple characteristics in regard to a slip system and reveals clear dislocation etch pits. The (100) surface of this single crystal was exposed to vibratory cavitation to study the plastic deformation behavior produced by bubble collapses. Many dislocation rows with various lengths which intersect the specimen surface at 45° were observed on the (010) or (001) cross section. Long dislocation rows correspond to strong impact forces. The maximum depth of the dislocation rows remains constant and the density of the rows increases with exposure time. A decrease in cavitation intensity, which was made with an increase in distance between the vibrating disk and the specimen surface, reduces the maximum depth of the dislocation rows.
一般社団法人日本機械学会の論文
1990-07-25