KIT | KIT-Bibliothek | Impressum

Improvement of RAFM steels through thermo-mechanical treatments

Hoffmann, J.; Rieth, M.; Commin, L.; Fernandez, P.; Roldan, M.

Abstract:
*contact:
Jan Hoffmann
E‐Mail: j.hoffmann@kit.edu
Phone: +49 (0) 721 6082 3476
Improvement of RAFM steels through thermo‐mechanical
Materials and Process
Batch
W
Cr
Ta
Fe
EUROFER97‐2 993402
1.06
8.9
0.18
0.04
0.15
0.1
bal.
EUROFER97‐2 993391
1.08
8.83
0.2
0.02
0.12
0.1
bal.
Dissolution of all secondary phases  Cooling to rolling temperature in 
(carbides, nitrides)
furnace (metastable austenite phase)
Rolling in the austenite phase
Microstructure
Thermodynamics
Crystallography
800°C
Predictions of secondary phases by 
simulation (JMatPro)
Microstructure: large prior austenite 
grains and fine martensite laths
Fine distribution of carbides (TaC) and nitrides (VN)
Yield strength
DBTT / USE
Creep
Conclusions:
TMT leads to a shift in mechanical and microstructural properties:
• Ausforming at 900°C is the most effective way to refine the microstructure and distribution of the secondary phases.
• The high solution treatment at 1250°C leads to a full dissolution of all carbo‐nitrides.
• PAG size is very large due to dissolution of TaC
• Creep Tests are still running, preliminary results look ... mehr


Zugehörige Institution(en) am KIT Institut für Angewandte Materialien - Angewandte Werkstoffphysik (IAM-AWP)
Publikationstyp Poster
Jahr 2015
Sprache Englisch
Identifikator URN: urn:nbn:de:swb:90-AAA2201033763
KITopen ID: 220103376
HGF-Programm 31.40.03; LK 01
Erschienen in 17th International Conference on Fusion Reactor Materials, Aachen, October 12- 16, 2015
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft KITopen Landing Page