Abstract
Little is known about the changes in physical and chemical properties of U71Mn steel during supersonic operation. In this paper, the impact adiabatic relationship of U71Mn steel in the range of 0.5~1km/s impact velocity was studied by flyer impact experiment. The data shows that with the increase of the impact velocity, the Hugoniot pressure of U71Mn steel increases significantly, but the increment of the Hugoniot temperature is relatively small. U71Mn steel does not undergo phase transformation under the impact of 0~23.5GPa pressure range.
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