J. Phys. IV France
Volume 112, October 2003
Page(s) 359 - 363

J. Phys. IV France
112 (2003) 359
DOI: 10.1051/jp4:2003901

Damping and mechanical properties of nitrogen-containing Fe-Mn alloys

V.V. Blyznyuk1, N.I. Glavatska1, O. Sôderberg1, V.G. Gavriljuk1 and V.K. Lindroos1

1  Institute for Metal Physics, Department of Steels and Alloys, Vernadsky Blvd. 36, 03680 Kiev 142, Ukraine

An effect of nitrogen on damping in Fe-Mn alloys is studied. It is shown that nitrogen provides unchanged value of damping capacity in the alloy Fe-17Mn (wt. %) in spite of a decrease in the fraction of the thermally-induced h.c.p. $\epsilon$-martensite. This effect is attributed to an enhanced mobility of Shockley partials at the interface between the $\epsilon$-martensite bands and residual austenite. At the same time nitrogen increases the yield and ultimate strengths at nearly the same value of plasticity of the Fe-14Mn alloy and increases plasticity of the Fe-17Mn alloy by more than three times.

© EDP Sciences 2003