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2- ODS Steels (1/6)Introduction – Low swelling of ferritic/martensitic steelsBut need of improvement in mechanical properties (creep)ε (%)Principle of ODS (Oxide Dispersed Strengthening) :Reinforcement of ferritic/martensitic steels by homogeneous distribution of nanosize oxides(e.g. Y 2 O 3 ), stable in temperature and under irradiationFerritic Fe 14Cr 1W 0,3Mn 0,3 Si 0,2 Ni Ti + Y 2 O 3Fe-18Cr650°C180 MPaODS Fe-18Cr 0,5 Y 2 O 3Time (h) Fe 18Cr 1W 0,3Mn 0,3 Si 0,2 Ni Ti + Y 2 O 3 Fe 14Cr 2W Ti + Y 2 O 3- Anisotropic- Possible embrittlement under irradiation- Recrystallization difficult to control- Good corrosion resistanceMartensiticODS:Low deformation +Increase in rupture timetime Fe 9Cr 1W 0,3Mn 0,3 Si 0,2 Ni Ti + Y 2 O 3 Fe 9Cr 2W 0,3Mn 0,3 Si 0,2 Ni Ti + Y 2 O 3- Isotropic- Easier to manufacture- T < 750°C- Questionnable corrosion resistanceMarion LE FLEM, Advanced Materials for Fuel Cladding in Sodium Fast Reactors8
2- ODS Steels (2/6)Fabrication – Powder metallurgy (≠ melting of basic steels)Broyage mécaniqueMechanical alloyingGainageCanningHot extrusionFilage à chaudAlloyed Poudre pré-alliée powderpowder PoudreYPoudre Y 2 O 2 O 3 powder 3Matériau extruded final steelBars, tubesCEA/ SRMA/LTMEXMarion LE FLEM, Advanced Materials for Fuel Cladding in Sodium Fast Reactors 9
Page 1 and 2: ADVANCED MATERIALS FOR FUEL CLADDIN
Page 3 and 4: Introduction - SFR Fuel claddingRef
Page 5 and 6: 1- Advanced Austenitic Steels (1/3)
Page 7: 1- Advanced Austenitic Steels (3/3)
Page 11 and 12: 2- ODS Steels (4/6)Mechanical prope
Page 13 and 14: 2- ODS Steels (6/6)Stability under
Page 15 and 16: 3- Refractory metals (1/7)Introduct
Page 17 and 18: 3- Refractory metals - Vanadium all
Page 23 and 24: 3- Ceramic cladding ? (2/3)Mechanic
Page 25 and 26: 3- Ceramic cladding ? (4/4)Matrix c

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