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- W2067250981 abstract "Investigation of the brittle-to-ductile transition of mild steel was carried out. A representative temperature Tpm was defined and the transitions for the fracture toughness and the crack arrest were discovered at Tpm. On the basis of the features of cleavage fracture, the criterion for cleavage microcrack propagation across the grain boundary was established. By means of a simulation of cleavage fracture behaviour of the cracked bend specimen, the variation in the resistance to the microcrack propagation with temperature was revealed, and a sharp increase in the crack resistance because of the decrease in plastic constraint and increase in the effect of microcrack blunting at temperatures above Tpm was demonstrated. The implication is that the transitions at Tpm are actually the expressions of a change in the crack resistance and Tpm is a temperature which marks the beginning of the great increase in the crack resistance. Moreover, Tpm mainly depends on the property of material if the specimen meets a certain plastic constraint and hence the Tpm can be used to describe the fracture behaviour of the steel at low temperatures." @default.
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- W2067250981 date "1990-06-01" @default.
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- W2067250981 title "A mechanical and metallurgical approach to the characteristic brittle-to-ductile-transition temperature" @default.
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- W2067250981 doi "https://doi.org/10.1016/0921-5093(90)90168-3" @default.
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