HT80鋼電子ビーム溶接部のサイドグルーブ付シャルピ試験による破壊靭性評価
1985 年 3 巻 1 号 p. 97-103
詳細
1985 年 3 巻 1 号 p. 97-103
The purpose of the present study is to conduct the consideration on V-notch Charpy characteristics of HT80 electron beam welds which have remarkable hcterogeneity, by using side-groove Charpy tests developed in this study. Two kinds of 800 MPa class high tensile steels were used and three kinds of heatinput conditions of electron beam welding were selected. Both standard V-notch Charpy specimen and Charpy specimen with deep-both-side groove, 3 mm deep, were used.
The fracture path of electron beam welds which have considerable heterogeneity does not necessarily select the net section of standard V-notch Charpy specmien. For that case, the evaluation method proposed newly in the present paper is effective to evaluate fracture transition temperature vTS of weld metal/HAZ of EB-welds.
The absorbed energy vE versus temperature T relations of welds should be arranged uniquely by using the relative-temperature parameter (T-vTS). Although the evaluation of absorbed energy of HT80 EB-welds by standard V-notch Charpy tests is impassible due to remarkable heterogeneity in strength, the evaluation method using side groove Charily tests and the absorbed energy vE versus (T-vTS) curve proposed newly gives the reasonable results from the engineering sense.
