Finite element analysis of the plastic deformation in tandem process of simple shear extrusion and twist extrusion

Jung Gi Kim, Marat Latypov, Nima Pardis, Yan E. Beygelzimer, Hyoung Seop Kim

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

Recently, simple shear extrusion (SSE) and twist extrusion (TE) are introduced to fabricate ultrafine grained bulk rod metallic materials. The SSE and TE processes generate significant deformation inhomogeneity, with higher and lower strains in the center, respectively, which easily causes mechanical instability of the materials. In this study, to overcome this deformation inhomogeneity problem in SSE and TE, a tandem process of SSE and TE (TST) is suggested. The finite element method is applied for plastic deformation behavior during the TST process. The results demonstrate that the TST process can produce relatively homogeneously deformed materials. In particular, the effects of back pressure and processing order on the plastic deformation behaviors in the TST process are systematically analyzed.

Original languageEnglish (US)
Pages (from-to)858-865
Number of pages8
JournalMaterials and Design
Volume83
DOIs
StatePublished - Oct 15 2015
Externally publishedYes

Keywords

  • Back pressure
  • Finite element analysis
  • Severe plastic deformation
  • Simple shear extrusion
  • Twist extrusion

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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