遅れ破壊現象における初期き裂・擬へき開割れの生成条件と最終破断条件

概要

論文の詳細を見る
A study on the initiation of quasi-cleavage (QC) crack in the early stage of delayed fracture process has been made by means of a fractographic approach in cathodically charged, quenched and tempered SNCM439 steel. QC crack is the origin of delayed fracture, and the mechanistic condition of delayed fracture is characterized by two parameters : QC crack length and the nominal applied stress. SEM fractographic examination revealed that QC fracture which is characteristic of the early stage of delayed fracture initiates around nonmetallic inclusions and grows mainly in the rolling direction only under the hydrogen charging condition without stress and that the nominal applied stress causes the QC crack to grow in the plane of principal stress.
社団法人日本機械学会の論文
1994-05-25