Study of micro-upsetting by finite element simulation based on crystal plasticity and grain boundary strengthening theories

Jun Yuan Zheng, M. W. Fu

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

The properties of individual grains affect the mechanical behaviors and response of materials in micro-scaled deformation, viz., microforming, and there are unknown phenomena and deformation behaviors existing and limiting the wide application of microforming due to size effect. In this paper, a composite model combining crystal plasticity and grain boundary strengthening theories was developed for numerical investigation into the effect of grain boundaries on the plastic deformation of copper micro-upsetting. By comparing the results with and without grain-boundary structure, it is revealed that grain boundaries, which act as the barriers of crystal slip, result in the enhanced flow stress and the discontinuous distribution of stress and strain. The grain size effect is also considered in this research, and the results show the coarse-grained material reduces the flow stress and enhances the inhomogeneous deformation.

Original languageEnglish
Title of host publicationMaterial and Manufacturing Technology XII
EditorsVladimir Khovaylo, Fu Ming Wang
PublisherTrans Tech Publications Ltd
Pages21-28
Number of pages8
ISBN (Print)9783035718584
DOIs
Publication statusPublished - Aug 2021
Event12th International Conference on Materials and Manufacturing Technologies, ICMMT 2021 - Virtual, Online
Duration: 23 Apr 202126 Apr 2021

Publication series

NameKey Engineering Materials
Volume897 KEM
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795

Conference

Conference12th International Conference on Materials and Manufacturing Technologies, ICMMT 2021
CityVirtual, Online
Period23/04/2126/04/21

Keywords

  • Crystal plasticity
  • Grain boundary strengthening
  • Microforming
  • Size effect

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering

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