Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 720, Issue -, Pages 203-213Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2018.02.049
Keywords
Adiabatic shear band; Split Hopkinson pressure bar; Hat-shaped; Shear stress; Strain rate
Categories
Funding
- Defence Materials Technology Centre
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This paper investigates adiabatic shear bands (ASBs) in 2024-T351 aluminium and their effect on the mechanical properties and microstructure of this aluminium alloy. Using hat-shaped specimens in a split Hopkinson pressure bar (SHPB) and universal testing machine, resolved shear stress-nominal plastic shear strain curves were presented at shear strain rates between 1 x 10(-4) and 15.4 x 10(3) s(-1). A revised formula for shear stress in hat specimens is proposed. Microstructural observations were completed on deformed specimens, with hardness results, scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS) presented. A critical shear strain rate range for ASS initiation in these specimens of approximately 8500-10500 s(-1) was determined within impacted specimens.
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