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Indentation at elevated temperatures for determination of material properties of fusion relevant materials

Bredl, J.; Dany, M.; Schneider, H. C.; Kraft, O.


For structural materials assigned for future fusion application, the characterization of their mechanical behavior at their operating conditions is a very important part of the fusion research. In this context, the instrumented indentation is a useful technique of testing even small neutron­ irradiated samples. For this purpose, a high-temperature indentation device was developed to investigate materials at temperatures up to 650°C under remote-handling conditions at KIT. First results have shown the functionality of the different parts of the indentation device, e.g. a sufficient resolution of the optical displacement measurement and the thermal stability of the system. Sapphire and diamond are used as indenter tip materials for spherical and Vickers indenter. The differences in the elastic behavior of the materials with increasing temperature and the changes in the tip shape over time are not negligible and have to be taken into account for an accurate interpretation of the results. Hence, frequent inspections of the tips are necessary for a reliable performance of the device. In this study, a routine is presented to ensure a constant quality of the used indentation tips with respect to therestrictions of a future operation in a Hot Cell of the Fusion Material Laboratory. ... mehr

Zugehörige Institution(en) am KIT Institut für Angewandte Materialien - Werkstoff- und Biomechanik (IAM-WBM)
Publikationstyp Vortrag
Publikationsjahr 2015
Sprache Englisch
Identifikator KITopen-ID: 230102708
HGF-Programm 31.40.03 (POF III, LK 01) Materialentwicklung
Veranstaltung 17th International Conference on Fusion Reactor Materials, Aachen, October 12- 16, 2015
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