Shock response of stainless steel at high temperature |
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Authors: | Zhuowei Gu Xiaogang Jin Guoqing Gao |
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Affiliation: | (1) Laboratory for Shock Wave and Detonation Physics Research, Southwest Institute of Fluid Physics, CAEP, P.O. Box 919-113, Mianyang, 621900, People's Republic of China;(2) Laboratory for Shock Wave and Detonation Physics Research, Southwest Institute of Fluid Physics, CAEP, P.O. Box 919-113, Mianyang, 621900, People's Republic of China;(3) Materials Department, Southwest Jiaotong University, Chengdu, 610031, People's Republic of China |
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Abstract: | Measurements of the dynamic tensile strength of HR-2 (Cr-Ni-Mn-N) stainless steel have been carried out over the initial temperature range of 300 K–1000 K at shock stress of 8 GPa, the corresponding spall strength f and Hugoniot elastic limit HEL are determined from the wave profiles. In the temperature range of 300 K–806 K, f and HEL decrease linearly with increasing temperature T, i.e., f = 5.63-4.32 × 10–3T, HEL = 2.08-1.54 × 10–3T, but when heated to 980 K, HEL increases from 0.84 GPa at 806 K to 0.93 GPa at 980 K and f keeps at an almost fixed value of 2.15 GPa. The TEM analysis on recovery samples identified the existence of intermatallic compound Ni3Al and the carbide Cr23C6 in the sample of 806 K, another intermatallic compound Ni3Ti was found in the sample of 980 K. All these products emerge along crystal boundary. While no such products were found in the samples of 300 K and 650 K. |
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