Abstract
Fracture toughness is directly dependent on the stress and strain distribution ahead of a crack and the critical values of stress and strain for crack initiation. The ferrite grain size strongly affects these parameters. The variation in these parameters caused by the ferrite grain refinement determines the fracture toughness and fracture mode. This chapter discusses in detail the effect of ferrite grain size on these parameters and evaluates the fracture toughness (crack-tip-opening displacement) of the ultra-fine-grained steel.
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© 2014 National Institute for Materials Science, Japan. Published by Springer Japan
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Hanamura, T., Qiu, H. (2014). Ultra-Fine-Grained Steel: Fracture Toughness (Crack-Tip-Opening Displacement). In: Analysis of Fracture Toughness Mechanism in Ultra-fine-grained Steels. NIMS Monographs. Springer, Tokyo. https://doi.org/10.1007/978-4-431-54499-9_4
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DOI: https://doi.org/10.1007/978-4-431-54499-9_4
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