000217947 001__ 217947
000217947 005__ 20190317000424.0
000217947 0247_ $$2doi$$a10.1051/epjn/e2016-50008-7
000217947 02470 $$2ISI$$a000384804000001
000217947 037__ $$aARTICLE
000217947 245__ $$aInvestigation of the relationships between mechanical properties and microstructure in a Fe-9%Cr ODS steel
000217947 269__ $$a2016
000217947 260__ $$bEdp Sciences S A$$c2016$$aLes Ulis Cedex A
000217947 300__ $$a8
000217947 336__ $$aJournal Articles
000217947 520__ $$aFerritic-martensitic Oxide Dispersion Strengthened (ODS) steels are potential materials for fuel pin cladding in Sodium Fast Reactor (SFR) and their optimisation is essential for future industrial applications. In this paper, a feasibility study concerning the generation of tensile specimens using a quenching dilatometer is presented. The ODS steel investigated contains 9%Cr and exhibits a phase transformation between ferrite and austenite around 870 °C. The purpose was to generate different microstructures and to evaluate their tensile properties. Specimens were machined from a cladding tube and underwent controlled heat treatments inside the dilatometer. The microstructures were observed using Electron Backscatter Diffraction (EBSD) and tensile tests were performed at room temperature and at 650 °C. Results show that a tempered martensitic structure is the optimum state for tensile loading at room temperature. At 650 °C, the strengthening mechanisms that are involved differ and the microstructures exhibit more similar yield strengths. It also appeared that decarburisation during heat treatment in the dilatometer induces a decrease in the mechanical properties and heterogeneities in the dual-phase microstructure. This has been addressed by proposing a treatment with a much shorter time in the austenitic domain. Thereafter, the relaxation of macroscopic residual stresses inside the tube during the heat treatment was evaluated. They appear to decrease linearly with increasing temperature and the phase transformation has a limited effect on the relaxation.
000217947 6531_ $$aODS steel
000217947 6531_ $$aEBSD
000217947 6531_ $$ainternal stresses
000217947 700__ $$aHary, Benjamin
000217947 700__ $$aGuilbert, Thomas
000217947 700__ $$aWident, Pierre
000217947 700__ $$aBaudin, Thierry
000217947 700__ $$0248074$$g243441$$aLogé, Roland
000217947 700__ $$ade Carlan, Yann
000217947 773__ $$j2$$tEPJ Nuclear Sci. Technol.$$k7$$q2-8
000217947 8564_ $$uhttps://infoscience.epfl.ch/record/217947/files/epjn150008.pdf$$zn/a$$s3788016$$yn/a
000217947 909C0 $$xU12903$$0252516$$pLMTM
000217947 909CO $$qGLOBAL_SET$$pSTI$$ooai:infoscience.tind.io:217947$$particle
000217947 917Z8 $$x112215
000217947 937__ $$aEPFL-ARTICLE-217947
000217947 973__ $$rREVIEWED$$sPUBLISHED$$aEPFL
000217947 980__ $$aARTICLE