高炭素低クロム鋼の切欠き静的曲げ破壊におよぼす未溶解炭化物の影響

概要

論文の詳細を見る
A study has been made of effects of residual carbides on the notch slow bending fracture in high carbon and low chromium steels. Results obtained are as follows : Absorbed energy obtained of the 2 mmV notch test specimens decreases with an increase in mean particle size of residual carbides in specimens containing 13 per cent of residual carbides in volume, but increases with an increase in mean particle size of residual carbides in specimens containing 8 per cent of residual carbides in volume, regardless of the test temperature. It is assumed that the former depends primarily on the resistance of fracture of residual carbides or the resistance of separation of them from matrix owing to fracturing at the interface of them, while the latter depends primarily on stress concentration at the interface of residual carbides under 2 mmV notch. On the other hand, absorbed energy obtained of the 2mmV notch test specimens with pre-crack increases with an incresae in mean particle size of residual carbides, regardless of amounts of residual carbides and the test temperature, this being distinct from the results obtained of 2 mmV notch test specimens. It is assumed that these results depend primarily on stress concentration at the interface of residual carbides.
社団法人日本鉄鋼協会の論文
1977-01-01