Abstract
Effect of length scales on microstructure evolution during Severe Plastic Deformation (SPD) was studied using orthogonal machining as a test of microstructure response. Machining was performed on Ni-200 in the plane strain configuration inside the chamber of a scanning electron microscope. Mechanics of material flow in the deformation zone was characterized in-situ using Digital Image Correlation. Post-mortem Orientation Image Mapping was performed using Electron Back Scattered Diffraction on partially detached chip specimens. Length scales were varied by setting depths of cut between 10-1 μm. It was found that with shrinking length scales, the continuous evolution of microstructure induced by SPD is replaced by abrupt but sporadic refinement mechanisms. By machining pre-strained samples, it was seen that this switchover is further instigated by initial defect concentrations.
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.
