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Determination of the ductile-brittle transition temperature from the microplastic-strain rate
Summary
Researchers investigated whether the temperature at which the microplastic strain rate peaks in steel can serve as a practical indicator of the ductile-brittle transition temperature. Results showed this correlation holds for both cast and deformed steels, offering a new non-destructive method to assess fracture risk.
The possibility of the determination of the tendency of cast and deformed steels to brittle fracture using the temperature dependence of the small-plastic-strain rate is studied. The temperature corresponding to the maximum in this curve is found to indicate an abrupt decrease in the steel plasticity, which makes it possible to interpret it as the ductile-brittle transition temperature depending only on the structure of a material.