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On predicting the temperature and strain rate dependences of the fracture toughness of plain carbon steels

Authors
Journal
Materials Characterization
1044-5803
Publisher
Elsevier
Publication Date
Volume
31
Issue
2
Identifiers
DOI: 10.1016/1044-5803(93)90049-2

Abstract

Abstract The variability of fracture toughness and its dependence on temperature and strain rate are described by applying a well-developed and accepted model to some recent data found in the literature. At low testing temperatures (⩽ − 60°C), the estimated fracture toughnesses agree well with the measured values when the strain rate increased from 0.0001/s to 1500/s. At room temperature, the calculated fracture toughnesses agree to within 10% or better with the measured values if work-hardening exponents higher than those used at lower temperatures are used in the model. The increase in fracture toughnesses at higher temperatures under higher loading rate conditions is also discussed.

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