Temperature Dependent Mechanical Behavior of ODS Steels
- 26 December 2018
- journal article
- Published by Trans Tech Publications, Ltd. in Materials Science Forum
- Vol. 941, 257-262
Abstract
An oxide dispersion strengthened (ODS) ferritic steel with nanometric grain size has been produced by means of low-energy mechanical alloying (LEMA) of steel powder (Fe-14Cr-1W-0.4Ti) mixed with Y2O3 particles (0.3 wt%) and successive hot extrusion (HE). The material has equiaxed grains (mean size of 400 nm) and dislocation density of 4 x 1012 m-2, and exhibits superior mechanical properties with respect the unreinforced steel. The mechanical behavior has been compared with that of ODS steels prepared by means of the most common process, high-energy mechanical alloying (HEMA), consolidation through hot isostatic pressing (HIP) or hot extrusion (HE), annealing around 1100 °C for 1-2 hours, which produces a bimodal grain size distribution. The strengthening mechanisms have been examined and discussed to explain the different behavior.Keywords
This publication has 19 references indexed in Scilit:
- On the status and prospects for nanostructured ferritic alloys for nuclear fission and fusion application with emphasis on the underlying scienceScripta Materialia, 2018
- Effect of irradiation temperature on microstructure of ferritic-martensitic ODS steelJournal of Nuclear Materials, 2017
- Mechanical Characterization of a Nano-ODS Steel Prepared by Low-Energy Mechanical AlloyingMetals, 2017
- Development of next generation tempered and ODS reduced activation ferritic/martensitic steels for fusion energy applicationsNuclear Fusion, 2017
- Influence of alloy composition and temperature on corrosion behavior of ODS ferritic steelsJournal of Nuclear Materials, 2011
- Analytical characterization of secondary phases and void distributions in an ultrafine-grained ODS Fe–14Cr model alloyJournal of Nuclear Materials, 2011
- Creep behavior of ODS materials: A study of dislocations/precipitates interactionsJournal of Nuclear Materials, 2011
- Mechanical and microstructural behaviour of Y2O3 ODS EUROFER 97Journal of Nuclear Materials, 2007
- Modeling the microstructure–mechanical property relationship for a 12Cr–2W–V–Mo–Ni power plant steelMaterials Science and Engineering: A, 2003
- Perspective of ODS alloys application in nuclear environmentsJournal of Nuclear Materials, 2002