A Reassessment of the Extrapolation Technique for Determining Parasitic Cutting Loads Under Orthogonal Cutting in Strain-Rate Hardening Materials

Desktop microforming and welding system powered by a flextensional Terfenol-D transducer

“…This results in a condition that approaches an adiabatic band, where thermal effects result in a significant increase in flow stress (Hayden, 1965). In tempered alloys such as tool steel, deformation energy causes localized heating that can result in a reduced flow stress and increased ductility with increasing strain rate (Becze, 2001), while materials with fewer dislocation barriers such as annealed aluminum 1100 or zinc show an opposite adiabatic cooling effect with increasing strain rate (Stevenson, 1999), with an increase in punching force of approximately 30% when punching speeds increase from 14.7(10 -7 ) to 19.5 m/s, as shown in Figure 25 (Blazynski, 1987).…”