TIME INDEPENDENT TENSILE BEHAVIOUR OF A HIGH MANGANESE STEEL SELECTED AS A CANDIDATE MATERIAL IN CONCEPTUAL TOKAMAK FUSION REACTOR DESIGNS
A study is reported of uniaxial tensile properties over a wide temperature range (293 - 1173 K) and at different strain rates between 4 x 10**-5 to 4 x 10**-2 2x s**-1 for a high manganese content austenitic steel (Fe-17Mn-10Cr-0.1C) which is an alternative to AISI 316 stainless steel in the material selection for the conceptual tokamak fusion reactor designs. The behaviour of this alloy is similar to that of the other high manganese steels, including a strain induced gamma(fcc) -> epsilon(hcp) martensitic transformation which considerably increases the strain hardening rate and leads to a maximum in ductility near 470 K. Moreover, non-linear statistical analysis of the true stress - true strain data, fitted to several constitutive equations, show that the best description of plastic flow is given, for the present material, by the Ludwigson law.
Bibliographic Reference: NUCLEAR ENGINEERING AND DESIGN/FUSION, VOL. 2 (1985), PP. 391-406
Record Number: 1989124007300 / Last updated on: 1987-01-01
Available languages: en