2.25Cr-1Mo 鋼のトンネル化したクリープき裂に対する電気ポテンシャル法の適用

概要

論文の詳細を見る
The applicability of the electrical potential method to measuring tunnelled creep crack growth of 2.25Cr-1Mo steel at 540℃ was investigated. By dividing the changes in creep crack area with CT specimen thickness, through-the-thickness average crack extensions were obtained. The predicted crack extensions from electrical potential were equivalent to the three point averages of the measured crack extensions across the thickness on the fracture surfaces. Crack growth rates of the tunnelled creep cracks were underestimated in comparison with the growth rates on the CT specimens with side grooves. It was found that adjusting by the maximum measured extension of the tunnelled creep crack improved the relationship between the crack growth rate and C integral.
社団法人日本鉄鋼協会の論文
1987-10-01