This article is cited in 12 papers

Influence of the temperature-induced martensitic-austenitic transformation on the strength properties of high-alloy steels under dynamic loading

A. S. Savinykh^ab, G. V. Garkushin^ab, S. V. Razorenov^ab, S. Wolf^c, L. Krüger<sup>c

a</sup> Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, 142432, Russia
^b National Research Tomsk State University, Tomsk, 634050, Russia
^c Freiberg University of Mining and Technology, Freiberg, 09599, Germany

Abstract: The dynamic elastic limit and spall strength of high-alloy chromium-manganese-nickel steel in the martensitic-austenitic transformation induced by a change in the temperature from -120 to 200$^\circ$C is measured by recording the complete wave profiles with a VISAR laser interferometer and subsequently analyzing them. The spall strength of the investigated steel in the martensitic phase is found to be 25–30% higher than the strength of steel in the austenitic phase. In this case, the strength decreases in a stepwise manner in a narrow temperature range approximately from -50 to 20$^\circ$C, where, apparently, basic changes in the internal structure of steel occur due to the martensitic-austenitic transformation. The measured values of the dynamic elastic limit of high-alloy steel have a sufficiently large scatter and hardly decrease with increasing temperature without any features associated with the martensitic-austenitic transformation of the structure.

Keywords: high-alloy steel, martensitic-austenitic transformation, shock-wave loading, spall strength, free surface velocity profile.

UDC: 539.3

Received: 03.06.2014

 English version: Combustion, Explosion and Shock Waves, 2015, 51:1, 124–129

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