Axial yield strengths and phase-transition stresses for 〈100〉, 〈110〉, and 〈111〉 germanium

Abstract

The dynamic compressive yield strengths and compression characteristics under uniaxial shock‐wave loading have been determined for three axes of crystalline germanium. At less than about 250 kbar, shocks propagated along the three axes exhibited three wave structures that were taken to be related to the Hugoniot elastic limits (HEL's) and to polymorphic phase transitions. Values obtained for HEL's and the stresses required to initiate the phase transition along each axis were 58, 48, 47, and 117, 119, 125 kbar, respectively, for the 〈100〉, 〈110〉, and 〈111〉 axes.