A new macroscopic strain hardening function based on microscale crystal plasticity and its application in polycrystal modeling

A new phenomenological strain hardening function is proposed to describe the strain hardening behavior of metallic materials. The function is based on a simplification of an earlier established self and latent hardening crystal plasticity approach. The proposed function contains only four parameters...

Full description

Saved in:
Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2021-08, Vol.823, p.141634, Article 141634
Main Authors: Sahoo, Sudeep K., Dhinwal, Satyaveer Singh, Vu, Viet Q., Toth, Laszlo S.
Format: Article
Language:English
Subjects:
Chemical Sciences
Crystals
Curve fitting
Engineering Sciences
Mathematical models
Parameters
Phenomenological function
Plastic properties
Polycrystal plasticity
Polycrystals
Strain hardening
VPSC modeling
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A new phenomenological strain hardening function is proposed to describe the strain hardening behavior of metallic materials. The function is based on a simplification of an earlier established self and latent hardening crystal plasticity approach. The proposed function contains only four parameters, which can be readily obtained using an efficient numerical technique by fitting the experimental curve. Several applications on different materials are presented and good agreements with the experimental counterparts were obtained. One great advantage of the proposed empirical function is that its parameters can be directly used in polycrystal viscoplastic modeling (VPSC approach) for crystal plasticity-based incremental strain hardening simulations. For the conversion of the parameters between the macroscopic scale and the grain-level, the Taylor factor was used, which was re-defined for polycrystals in the present work. The VPSC simulations also led to good reproduction of the experimental strain hardening behavior for all investigated cases, with rapid convergence. •A new phenomenological strain hardening function is proposed based on crystal plasticity.•Applications are presented for four materials deformed in three deformation paths.•The obtained parameters are directly used in polycrystal VPSC simulations.•The polycrystal Taylor factor is used for transferring macroscopic parameters to grains.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2021.141634