Shear Failure of Inconel 718 under Dynamic Loads

Kinetics of deformation and fracture of nickel-iron alloy Inconel 718 under dynamic shear loading was measured using a split torsional Hopkinson bar facility and high-speed photography. Tubular specimens with a reduced gage length and a starter notch were sheared at strain rates up to 6X10 s. High-s...

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Bibliographic Details
Published in:Experimental mechanics 2007-12, Vol.47 (6), p.723-732
Main Authors: SHOCKEY, D. A, SIMONS, J. W, BROWN, C. S, KOBAYASHI, T
Format: Article
Language:English
Subjects:
Exact sciences and technology
Fracture mechanics (crack, fatigue, damage...)
Fundamental areas of phenomenology (including applications)
Measurement and testing methods
Physics
Solid mechanics
Structural and continuum mechanics
Vibration, mechanical wave, dynamic stability (aeroelasticity, vibration control...)
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Summary:Kinetics of deformation and fracture of nickel-iron alloy Inconel 718 under dynamic shear loading was measured using a split torsional Hopkinson bar facility and high-speed photography. Tubular specimens with a reduced gage length and a starter notch were sheared at strain rates up to 6X10 s. High-speed photographs of fiducial lines scribed on the specimen surface showed the development of local strains and cracking. This paper describes the experimental and analytical procedures, illustrates average and local plastic strain evolution, and presents shear crack initiation times and propagation speeds.
ISSN:0014-4851
1741-2765
DOI:10.1007/s11340-007-9068-2