Abstract
Anvil-on-rod impact tests were performed on as-received (cold-rolled) OFHC copper rods and copper processed by 2- or 8-passes of equal channel angular pressing (ECAP). The average grain size ranged from ∼30 μm for the as-received sample to ∼440 nm for the 8-pass sample. The dynamic deformation states of the samples were captured by high-speed digital photography and velocity interferometry was used to record the sample back (free) surface velocity. Computer simulations utilizing AUTODYN-2D hydrocode with the Johnson–Cook constitutive model were used to generate free surface velocity traces and transient deformation profiles for comparison with the experimental data. The comparison of experimental results with AUTODYN simulations provided a means for extracting the strain-rate sensitivity of copper as a function of grain size. Strain-rate sensitivity was found to increase as grain size decreased.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
