Effect of the Microstructure on the Deformation and Fracture Behavior of an Austenitic Heat Resisting Steel

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概要

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• The tensile properties in a 21-4N austenitic engine valve steel containing pearlitic nodules due to grain boundary reaction have been investigated. The theoretical consideration has been also made on the deformation and fracture behavior in this steel. In the steel with grain boundary reaction nodules, the ductility decreased considerably at room temperature, while it increased at elevated temperature. Although the grain boundary reaction also decreased the tensile strength and 0.2% proof stress, its effect was more noticeable on ductility than on strength. A theory is developed to explain the work hardening behavior as well as the fracture mechanism using a model for composite materials and a good agreement between theoretical and experimental results is obtained.

• 一般社団法人日本機械学会の論文

著者

• MIYAGAWA Ohmi

  Faculty of Technology, Tokyo Metropolitan University

• Tanaka Manabu

  Mining College Akita University

• Miyagawa Ohmi

  Faculty Of Technology Tokyo Metropolitan University

• Fujita Haruhiko

  Mining College Akita University

• SAKAKI Tsune-aki

  Faculty of Technology, Tokyo Metropolitan University

• Sakaki Tsune-aki

  Faculty Of Technology Tokyo Metropolitan University

関連論文

• Creep Crack Propagation in Austenitic Steels Having Different Levels of Ductility
• Effects of Grain and Grain Boundary Strengths on the Creep Crack Propagation of an Austenitic Heat Resisting Steel
• On the Improvement of High-temperature Low-cycle Fatigue Property by Grain-boundary Reaction Precipitates
• Effect of the Microstructure on the Deformation and Fracture Behavior of an Austenitic Heat Resisting Steel

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