Activation volume of pure face centered cubic metals using uniaxial testing and nanoindentation equipped with high load capability

Abstract

Activation volume data measured using uniaxial testing are compared with activation volume data measured using nanoindentation equipped with high load capability that can reach 10 N for Al, Ag, and Ni FCC metals. The data when plotted V*/b3 versus H (hardness), extrapolated into literature data from conventional uniaxial testing. V*/b3 is shown to be sensitive to H. This is consistent with the theory of the accumulation of dislocations with strain hardening which results in smaller activation area swept out by dislocations during activation.