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靱性評価(昭和60年度春季全国大会論文発表講演論文)

概要

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The purpose of the present study is to conduct the consideration on V-notch Charpy characteristics of HT80 electron beam welds which have remarkable heterogeneity, 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 heat-input 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 _VT_S 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-_V-T_S). Although the evaluation of absorbed energy of HT80 EB-welds by standard V-notch Charpy tests is impossible due to remarkable heterogeneity in strength, the evaluation method using side groove Charpy tests and the absorbed energy _VE versus (T-_VT_S) curve proposed newly gives the reasonable results from the engineering sense.
社団法人溶接学会の論文
1985-02-05