The effect of morphology on the strength of pearlite

Effect of interlamellar spacing on the elastoplastic behavior of C70 pearlitic steel: Experimental results and self-consistent modeling

“…(2)). The linearity of relation is validated for a wider range of interlamellar spacing integrating results of C70 pearlitic steel and literature data [17,18] as confirmed by the diagram ln(r y -r 0 ) = f(ln(Sp)) (Fig. 12).…”

“…The exponent m is classically equal to (À2) for hypo and hypereutectoid steels [2,27] and reconsidered to be equal to (À1) in the modified Hall-Petch relation in order to give a physical validation of friction stress r 0 in the case of eutectoid steels [17,18]. Indeed, the representation of experimental results using classical Hall Petch relation (Sp À2 ) leads to a negative intercept r 0 , which has no apparent physical meaning.…”

“…Hyzak and Bernstein [16] showed that the strength of fully pearlitic steel is controlled primarily by the interlamellar spacing, while the toughness is strongly dependent on the prior-austenitic grain size. It has been reported by several investigators [17][18][19] that the strength of pearlitic steels follows a Hall-Petch type relationship with respect to the interlamellar spacing.…”

Structure-property relationships in microalloyed ferrite-earlite steels- phase 1 :

“…The most important structural feature that affects the strength of P, for a given C content, is the spacing of the lamellar carbides Figure 8 shows data from Marder and uramfitt (27) Lagneborg et al (28) reported equations that relate the C and Mn content to f(P) for steel bars with different diameters $, which resulted in different cooling rates. Effect of interlamellar spacing on YS of eutectoid steel (26) Depending upon the exact application, it may be necessary to also consider other transformation products like bainite or martensite.…”

“…Marder and Bramfitt (27) The Fe 3 C constituent in P is the main contributor to the volume fraction of second phase particles in MA forging steels, so we know that we need to minimize the carbide phase in order to obtain the highest possible %RA (Fig. 15).…”