Shock response of nickel in the pressure range 820–1500 kb

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Abstract
Electron transmission microscopy studies have been made of the shock hardening mechanism in nickel over the pressure range 820–1500 kb. It was found that as pressure increases, mechanical twinning does not occur and thermal effects dominate the high pressure microstructure. The mechanical hardness of these samples also reflects the effects of shock heating and for a shock pressure of 1500 kb both the microstructure and hardness are characteristic of the fully annealed state.