計装化シャルピー試験システムの開発とその溶接部への応用

概要

論文の詳細を見る
In this study, a instrumented Charpy impact testing system was developed. In this system, output of strain gauge was memorized in memory-scope and then these dada were sent to a personal computer. In the personal computer, some characteristic values of load and absorbed energy were calculated by interactive processing. The value of absorbed energy was calculated on the basis of the change of the kinetic energy of rotation. Then, this system was applied to investigate the characteristics of fracture in the bond region of multi-pass welded high strength steel. And it was found that there was four types of fracture process. Therefore, the characteristic values of load and energy were obtained in these four types. It was found that the some criteria could be obtained using these characteristic values. That is, upper limit temperature below which fracture initiated as brittle fracture, upper limit temperature below which brittle fracture appeared in the process of fracture and index of the resisting force against the initiation of brittle fracture.
津山工業高等専門学校の論文
1988-02-29