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Report No.

Multi-scale analysis of deformation behavior at SCC crack tip, 3 (Contract research)

Kaji, Yoshiyuki ; Miwa, Yukio; Tsukada, Takashi ; Hayakawa, Masao*; Nagashima, Nobuo*

This report describes a result of the research conducted by the Japan Atomic Energy Agency and the National Institute for Materials Science under contract with JNES that was concerned with a multi-scale analysis of plastic deformation behavior at the crack tip of SCC. In this research, analyses of the plastic deformation behavior and microstructure around the crack tip were performed in a nano-order scale. The hardness measured in nano, meso and macro scales was employed as a common index of the strength, and the essential data necessary to understand the SCC propagation behavior were acquired and analyzed that are mainly a size of plastic deformation region and a microstructural information in the region, e.g. data of crystallografy, microscopic deformation and dislocations at the inside of grains and grain boundaries.



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