A study of the impact deformation and fracture behaviour of austenitic manganese steel

Woei-Shyan Lee, Bo Kai Wang

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

This study uses the split-Hopkinson pressure bar to investigate the impact deformation and fracture behaviour of austenitic manganese steel at strain rates ranging from 2.0 × 103 s-1 to 8.0 × 10 3 s-1 at room temperature. The experimental results indicate that strain rate exerts a significant influence on the mechanical properties of austenitic manganese steel. With an increasing strain rate, the impact flow stress, work hardening rate, and strain rate sensitivity increase, while the activation volume decreases. The variations of strain rate sensitivity and activation volume are closely related to the work hardening stress. The results of this study show that the observed flow behaviour is described accurately by the Zerilli-Armstrong constitutive law. Fractographic analysis reveals that the specimen fracture is dominated by the formation of an adiabatic shear band formation. Furthermore, dimple characteristics and cleavage facets are observed on the fracture surface, indicating a relatively ductile fracture mode. The cleavage fracture is found to be associated with the increasing strain rate, which gives rise to a loss of deformability.

Original languageEnglish
Pages (from-to)459-466
Number of pages8
JournalMetals and Materials International
Volume12
Issue number6
DOIs
Publication statusPublished - 2006 Jan 1

Fingerprint

Steel
Manganese
strain rate
manganese
Strain rate
steels
work hardening
Strain hardening
cleavage
Chemical activation
activation
Ductile fracture
Shear bands
Formability
Plastic flow
flat surfaces
mechanical properties
shear
Mechanical properties
room temperature

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

Cite this

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A study of the impact deformation and fracture behaviour of austenitic manganese steel. / Lee, Woei-Shyan; Wang, Bo Kai.

In: Metals and Materials International, Vol. 12, No. 6, 01.01.2006, p. 459-466.

Research output: Contribution to journalArticle

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