Abstract
The improvement of delayed fracture (DF) and fatigue resistance for steels, especially the former of martensitic steel, through microstructure refining and strengthening are the main concern in this chapter. Firstly, the effects of microstructure refinement in toughening and improving DF property of martensitic steels are studied. Secondly, methods for strengthening grain boundaries such as reducing the amount of segregated embrittling elements at grain boundaries and controlling grain boundary carbides are discussed. Thirdly, the effect of controlling hydrogen trap through microalloying element carbides on improving DF resistance is investigated. Fourthly, the effect of cleanliness on the fatigue performance of martensitic steels is discussed. Finally, new high strength martensitic steels ADF series with excellent combination of toughness, DF and fatigue resistance as well as its characteristics and industrial applications were introduced.
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Hui, W. (2009). Microstructure Refining and Strengthening of Martensitic Steel. In: Ultra-Fine Grained Steels. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-77230-9_6
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DOI: https://doi.org/10.1007/978-3-540-77230-9_6
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