Ductility Transition and Cold Brittleness

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概要

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• The occurrence of the change of fracture from ductile type to brittle one which is often called 'cold brittleness' is studied from the standpoint of the stochastic theory. In the present paper failure and fracture processes were treated as reaction rate process. The relation between deformation velocity, $V_{B}$, and the absolute temperature for brittle fracture was obtained as the form: $\log V_{B}{=}-\frac{Q}{RT}+c_{0}.$ The effect of radius of notch on the transition, the size effect, and the scatter of the brittle strength were also interpreted from the same standpoint. In the case in which the Cottrell-Bilby mechanism for yielding, and nucleation process for brittle fracture, respectively, are regarded as rate-determining, similar results can also be obtained.

• 社団法人 日本物理学会の論文
• 1953-01-25

著者

• Yokobori Takeo

  Institute Of Scicnce And Tcchnology University Of Tokyo

関連論文

• The Theory of Fatigue Fracture of Metals
• Failure and Fracture of Metals as Rate Processes
• Creep Fracture of Copper as Nucleation Process
• Failure and Fracture of Metals as Nucleation Processes
• On the Rate of the Nucleation in the Recrystallization
• Fatigue Fracture of Steel.
• Delayed Fracture in Creep of Copper.
• Fatigue Fracture from the Standpoint of the Stochastic Theory
• Damage as an Initial Stage of Fatigue Fracture
• Ductility Transition and Cold Brittleness

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