Results of multiscale mean-field elasticity simulation for hypereutectoid steel

Published: 11-04-2019| Version 1 | DOI: 10.17632/225wcynh3f.1
Contributor:
Marko Vogric

Description

This data has been obtained through a multiscale homogenisation of the elastic properties of hypereutectoid steel in the presence of pearlite and proeutectoid cementite. The elastic properties of pearlite colonies have first been homogenised, with a Mori-Tanaka scheme in the case of globular pearlite (GP) or with a classical self-consistent scheme in the case of lamellar pearlite (LP). In the LP case, an additionnal homogenisation step has been followed, using an input parameter called diversity factor (div) and a classical self-consistent scheme with div^3 different pearlite colonies with different orientations. Finally, the entire material has been homogenised using generalized self-consistent scheme in the case of a continuous proeutectoid cementite film along the former austenite grain boundaries (CC), or classical self-consistent scheme in the case of fragmented cementite particles along the former austenite grain boundaries (FC). The input data is: 1) the bulk and shear moduli of cementite and ferrite (both phases being considered isotropic), this data being taken from different literature sources; 2) the diversity factor div; 3) the thickness of the proeutectoid cementite dscem; 4) the pearlite colony size dpearl; 5) in the LP case, the interlamellar spacing, and a generalised aspect ratio for the pearlite lamellae. This data has first been compared to diverse literature sources for pearlitic or ferritic-pearlitic steel (Freitas et al. (2010), Durgaprasad et al. (2017), Kim and Johnson (2007)) with different input data for cementite (Ledbetter (2010), Hanabusa et al. (1969), Dodd et al. (2003)) and one set of input data for ferrite only (Kim and Johnson (2007)). Then, using input data from Ledbetter (2010) or Dodd et al. (2003) for cementite, the influence of dscem and dpearl has been investigated.

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