This article is cited in 34 papers

Mechanical properties, strength physics and plasticity

High strain rate deformation and fracture of the magnesium alloy Ma2-1 under shock wave loading

G. V. Garkushin^a, G. I. Kanel'^b, S. V. Razorenov<sup>a

a</sup> Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Moscow region, 142432, Russia
^b Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow

Abstract: This paper presents the results of measurements of the dynamic elastic limit and spall strength under shock wave loading of specimens of the magnesium alloy Ma2-1 with a thickness ranging from 0.25 to 10 mm at normal and elevated (to 550$^\circ$C) temperatures. From the results of measurements of the decay of the elastic precursor of a shock compression wave, it has been found that the plastic strain rate behind the front of the elastic precursor decreases from 2 $\times$ 10$^5$ s$^{-1}$ at a distance of 0.25 mm to 10$^3$ s$^{-1}$ at a distance of 10 mm. The plastic strain rate in a shock wave is one order of magnitude higher than that in the elastic precursor at the same value of the shear stress. The spall strength of the alloy decreases as the solidus temperature is approached.

Received: 14.06.2011
Accepted: 31.10.2011

 English version: Physics of the Solid State, 2012, 54:5, 1079–1085

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