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Microstructure based modeling of the strain rate history effect in wear resistant Hadfield steels

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Details

Original languageEnglish
Pages (from-to)56-66
Number of pages11
JournalWear
Volume396-397
Early online date21 Nov 2017
DOIs
Publication statusPublished - Feb 2018
Publication typeA1 Journal article-refereed

Abstract

The strain rate history dependency of Hadfield steel is investigated by numerical modeling. A crystal plasticity model is employed to study the effect of strain rate jump/drop on the material's strain hardening and twinning propensity. Single crystal orientations are first examined to assess the importance of the strain rate and its history effects. Then a representative 3D microstructure aggregate is used to investigate the effects of strain rate history in a polycrystalline structure. It was found that strain rate affects the evolution of deformation twins in the microstructure, generating a strain rate history dependent deformation and hardening response. A Hadfield steel used in mineral crushing conditions is also characterized to provide details of the deformation and hardening behavior of the material under realistic low/high strain rate loading conditions. The importance of strain rate changes to strengthening and increasing the hardness of the polycrystal microstructure is discussed and considered from the wear resistance point of view.

Publication forum classification

Field of science, Statistics Finland