Statistical Aspects of Brittle Fracture in Low-Alloyed Steels(Fatigue & Fracture)
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概要
- 論文の詳細を見る
This paper presents a method for quantifying probability of brittle fracture in low alloy steels. The proposed method shows how the probability of brittle fracture varies with stress intensity factor, temperature, deformation characteristics and microstructural parameters of low-alloyed steel. Application of this method on Ni-Cr steel demonstrated very good agreement of predicted temperature dependence of scatter in brittle fracture toughness with experimental results. The method enables also to calculate characteristic distance as a radial dimension from the crack tip where microcrack initiation is most probable. The characteristic distance of investigated Ni-Cr steel was found to decrease with increasing temperature. Microstructural mechanisms of initiation and propagation of brittle fracture were identified from results of fractography analysis. The proposed procedure represents a foundation for systematic control of relationship between stress-strain behaviors, toughness and reliability of steel engineering parts.
- 一般社団法人日本機械学会の論文
- 2002-04-15
著者
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SHIRATORI Masaki
Department of Mechanical Engineering and Materials Science, Yokohama National University
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Nedbal Ivan
Czech Technical University of Prague, Department of Materials
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Prioul Claude
Ecole Centrale Paris, Laboratoire de Mecanique des Sols, Structures et Materiaux, Voie des Vignes
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Nedbal Ivan
Czech Technical University Of Prague Department Of Materials
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Prioul Claude
Ecole Centrale Paris Laboratoire De Mecanique Des Sols Structures Et Materiaux Voie Des Vignes
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STRNADEL Bohumir
Technical University of Ostrava, Department of Materials Engineering
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Shiratori Masaki
Department Of Mechanical Engineering And Materials Science Yokohama National University
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Strnadel B
Technical Univ. Ostrava Ostrava Cze
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