Strain-rate and grain-size effect on substructures and mechanical properties in OFHC copper during tension

Experimental investigation of industrial copper deformed by wire drawing process

“…We noted on the one hand the decrease of the lattice parameter, of the amplitude of the outer cut-off radius, as well as the average size of the crystallites; and on the other hand, we found that the dislocation density increases. The increase of dislocation density d dis is explained by work hardening mechanism upon cold drawing by continued trapping of newly created mobile dislocations, existing dislocations and their incorporation into the various microstructural elements [20]. Table 4.…”

On a Microstructural Theory of Plastic Deformation in Face-Centered-Cubic Materials

“…Based on this data, Raj has constructed an empirical relationship between applied stress and subgrain diameter (Raj, 1996b). In addition, Varma along with three of his students have measured flow stresses and the corresponding subgrain diameters in three FCC metals: aluminum (Sil, 1993), copper (Shankaranarayan, 1995), and nickel (Rao, 1993). …”

“…(Honeycombe, 1984) Taking ß, the ratio x c /Ax to be one and subsequently Representative values (Shankaranarayan, 1995) of these parameters are given in Table 1 …”

Modelling flow stress of AISI 316L at high strain rates

“…Shume et al (1989) studied the grain size influence on the substructure in copper at low strain rates and found that coarser grain sizes result in larger cells but the difference becomes less pronounced as the strain increases. Rao and Varma (1993), Sil and Varma (1993), and Shankaranarayan and Varma (1995) have studied the dislocation substructure at low strain rates in three different FCC metals: nickel, aluminium, copper. Decreasing as well as increasing cell size with increasing strain rate was reported.…”