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

Woei Shyan Lee, Bo Kai Wang

研究成果: Article同行評審

6 引文 斯高帕斯(Scopus)

摘要

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.

原文English
頁(從 - 到)459-466
頁數8
期刊Metals and Materials International
12
發行號6
DOIs
出版狀態Published - 2006 十二月

All Science Journal Classification (ASJC) codes

  • 凝聚態物理學
  • 材料力學
  • 金屬和合金
  • 材料化學

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