フラクトグラフィ的特徴と内部組織を対応させる方法の検討 : 衝撃破面を一例として

概要

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Fractography is an experimental technique often used in failure analyses or investigations aimed at improving fracture property. Because fractographic features are controlled by the underlying microstructure, for a better understanding of fractograph it is neccessary to have correlations between fractographic and microstructual feathers. A variety of methods have been applied to obtain these correlations, including the following : (1) direct ething of the fracture surfaces to reveal the underlying microstructure ; (2) simulataneous observation of the fracture surface and the corresponding selection after the removal of the electrolytical material; (3) combined observations of the fracture surface and the section. In this note the three methods mentioned avobe are discussed, being applied to impact fracture surface. The main results obtained are summarized as follow: (1) The method of the combined observations gives us most correct and precise knowledge of the fracture. (2) The method of the simultaneous observation has two drawback: the removal of the electrolytical material may damage the fracture surface and the fragment of the electolytical material may be left on the fracture surface. (3) The grain boudary is not recognized by the method of direct etching.
社団法人日本材料学会の論文
1985-12-15