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- W2089320980 abstract "In both simple ferrite-carbide materials, and more complex ferritic steels, cleavage is mediated by the fracture of the particles they contain. If particle cracking is easy, then extension of the resulting particle-sized microcracks into the ferrite matrix, can become the critical step in inducing fracture. Under these circumstances, brittle fracture is essentially stress-controlled, and several models use this as a basis for failure prediction. Fracture toughness data from a series of MnMoNi steels are presented, together with observations of fracture initiation sites, and calculations of the stresses and strains pertaining to these locations at failure, to show that there are circumstances under which particle cracking is not easy. A strain criterion is found to describe the probability of particle cracking effectively. A previously-published, stress-based model is generalised to include the strain criterion. The more general model correlates initiation site properties with K, and predicts a marked temperature-dependence of K (i.e. a ductile-to-brittle transition), even though the only temperature-dependent input parameters are the flow properties. Other input parameters for the model are linked explicitly to the microstructure. The relative dominance of particle cracking and microcrack extension in cleavage depends most strongly on initiating particle type, and final quench severity." @default.
- W2089320980 created "2016-06-24" @default.
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- W2089320980 date "2006-01-01" @default.
- W2089320980 modified "2023-09-27" @default.
- W2089320980 title "A Microstructure-Based Probabilistic Model for Cleavage in RPV Steels" @default.
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- W2089320980 doi "https://doi.org/10.1115/pvp2006-icpvt-11-93678" @default.
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