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

Content Provider	Springer Nature Link
Author	Lee, Woei Shyan Wang, Bo Kai
Copyright Year	2006
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 2.0×10$^{3}$ 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.
Starting Page	459
Ending Page	466
Page Count	8
File Format	PDF
ISSN	15989623
Journal	Metals and Materials
Volume Number	12
Issue Number	6
Language	English
Publisher	The Korean Institute of Metals and Materials
Publisher Date	2006-01-01
Publisher Place	Seoul
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	austenitic manganese steel split-Hopkinson pressure bar strain rate effect adiabatic shearing ductile fracture Metallic Materials Operating Procedures, Materials Treatment Magnetism, Magnetic Materials Engineering Thermodynamics, Heat and Mass Transfer Characterization and Evaluation of Materials Continuum Mechanics and Mechanics of Materials
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Mechanics of Materials Metals and Alloys Condensed Matter Physics

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