Strengthening of Pearlitic Steel by Ferrite/Cementite Elastic Misfit Strain

Nobuo Nakada; Norimitsu Koga; Yuki Tanaka; Toshihiro Tsuchiyama; Setsuo Takaki; Masaharu Ueda

doi:10.2355/isijinternational.ISIJINT-2015-102

Note

Strengthening of Pearlitic Steel by Ferrite/Cementite Elastic Misfit Strain

Nobuo Nakada , Norimitsu Koga, Yuki Tanaka, Toshihiro Tsuchiyama, Setsuo Takaki, Masaharu Ueda

Author information

Keywords: pearlite, strength, elastic misfit strain, lamellar eutectoid structure

JOURNAL OPEN ACCESS FULL-TEXT HTML

2015 Volume 55 Issue 9 Pages 2036-2038

DOI https://doi.org/10.2355/isijinternational.ISIJINT-2015-102

Details

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.

Corresponding author

Register with J-STAGE for free!