Probability of initiation and propagation of cleavage failures in spheroidized steels Online publication date: Fri, 05-Nov-2010
by B. Strnadel, E. Mazancova, K. Mazanec
International Journal of Materials and Product Technology (IJMPT), Vol. 5, No. 1, 1990
Abstract: This paper presents a procedure for quantifying the probability of cleavage failures arising and spreading in spheroidized steels, which is based on statistical analyses of the sizes of precipitated carbides. It shows how the total cleavage fracture probability varies with the stress intensity factor, the temperature, and the deformation characteristics and microstructural parameters of the examined steel. This quantification of the total probability of cleavage fracture arising has been applied for predicting the lower bound of the temperature dependence of fracture toughness. Experimental findings have been processed to yield a statistical model of cleavage fracture propagation. The probability Pίί of the main crack being arrested is shown to depend on a parameter (χσ2y/Κ2IC) investigation; investigation of this dependence has revealed the lowest value of this parameter at which Pίί = 1. The role and importance of this new parameter is similar to that of the characteristic distance.
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