DETERIORATION OF FRACTURE TOUGHNESS OF STEEL BY EFFECT OF TENSILE AND COMPRESSIVE PRESTRAIN

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  • 引張および圧縮の塑性歪み履歴による鋼材の破壊靭性劣化
  • 引張および圧縮の塑性歪み履歴による鋼材の破壊靱性劣化
  • ヒッパリ オヨビ アッシュク ノ ソセイ ヒズミ リレキ ニ ヨル コウザイ ノ ハカイジンセイ レッカ

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In this study, the deterioration of fracture toughness by effect of prestrain of 6 types of steel was investigated by CTOD tests. As a result, it came to be clear that before strain aging effect appears, the fracture toughness of most types of steels can be deteriorated by prestrain itself and that how much fracture toughness is deteriorated is differs from steel to steel. Furthermore, the influence of the direction of prestrain was found on all the types of steel but one, and so the causes of the difference between tensile prestrain and compressive prestrain were also discussed.

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