ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
ISSN-L : 0915-1559
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Strengthening of Pearlitic Steel by Ferrite/Cementite Elastic Misfit Strain
Nobuo NakadaNorimitsu KogaYuki TanakaToshihiro TsuchiyamaSetsuo TakakiMasaharu Ueda
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2015 Volume 55 Issue 9 Pages 2036-2038

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Abstract

The strength of pearlitic steel was clearly reduced by annealing, even though cementite stably maintained a lamellar structure. In response, lattice strain of the ferrite phase in pearlite monotonically decreased with increasing annealing time. As a result, a good linear relationship was established between the strength and ferrite lattice strain independent of the interlamellar spacing and morphology of cementite. This suggests that the ferrite/cementite elastic misfit strain contributes to the high strength of pearlitic steel.

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© 2015 by The Iron and Steel Institute of Japan
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