Dynamical behavior of octahedrite from the Henbury meteorite

A suite of dynamic property measurements and characterization studies on an iron‐nickel single crystal from the Henbury octahedrite containing Widmanstatten intergrowths of kamacite and taenite (initial density 7.810) has been performed. These measurements include six impact tests (wave profile compression/release) over the stress range 2–20 GPa, metallography, quasi‐static and Hopkinson bar mechanical testing, and ultrasonic mapping and sound velocity measurements. A cryogenic impact test was included to evaluate effects of a brittle/ductile transition which has been reported at 200 K. Temperature sensitivity of the dynamic behavior was measured at high and low strain rates. The impact test results show loading strength (HEL), Hugoniot and α→e transition signatures to be similar to those for Armco iron, and do not show evidence for a ductile‐brittle transition at these extremely high strain rates. Metallographic analyses, quasi‐static and Hopkinson bar testing suggest that the material is in a work‐harde...