Evaluation of Ductile-Brittle Transition Temperature in Electron-Beam Welded Steel by Small Punch Test(Student Poster Session)
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概要
- 論文の詳細を見る
Toughness evaluation of narrow high-energy-beam welds by the conventional Charpy V-notch (CVN) impact test is not all successful because the crack often deviates from the fusion zone into the heat affected- or unaffected base metal-zones. The small-punch (SP) test was applied to the electron-beam welds of a steel with a 490 MPa yield strength to evaluate the toughness by measuring the ductile-brittle transition temperature (DBTT). The steel was electron-beam-welded with various heat-inputs and the welds were examined by Charpy V-notch and small-punch tests at 40-298 K. The SP-DBTTs obtained from the SP energy show a linear correlation with the CVN-DBTTs. The load-deflection curves during the small-punch tests and the fractography of small-punch tested specimens supported the ductile-brittle transitions. The results suggest that the small-punch test can be used to predict the DBTTs of the electron-beam welds, which cannot be accomplished by conventional Charpy V-notch impact tests.
- 一般社団法人日本機械学会の論文
- 2001-10-20
著者
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Kokawa Hiroyuki
Department Of Materials Processing Faculty Of Engineering Tohoku University
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Kokawa Hiroyuki
Department Of Materials Processing Graduate School Of Engineering Tohoku University
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Sato Yutaka
Department Of Biological Mechanisms And Functions Graduate School Of Bioagricultural Sciences Nagoya
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Gai Xiaohui
Department Of Materials Processing Graduate School Of Engineering Tohoku University
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Ichikawa Kazutoshi
Welding And Joining Research Center Steel Research Laboratories Nippon Steel Corporation
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Sato Yutaka
Department Of Biochemistry And Oral Health Science Center Tokyo Dental College
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Sato Yutaka
Department of Applied Physics, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei, Tokyo 184-8588, Japan
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SATO Yutaka
Department of Materials Processing, Graduate School of Engineering, Tohoku University
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