A High-Precision Rotational Rheometer for Temperatures up to 1700 °C

Abstract:

Rheometrical analysis of steel slurries in rotational rheometers requires a range of operating temperatures of about 1300 to 1600 °C, leading to a delicate device-related challenge with respect to the applied materials on the one hand and a suitable constructional set-up gaining unbiased measurements on the other hand. Accordingly, a new high-precision rotational rheometer for temperatures up to 1700 °C has been developed as an improvement on an existing rheometer previously developed at the Chair of Mechanical Process Engineering (AVT) of RWTH Aachen University. First measurements on the tool steel X210CrW12 in the mushy state with solid fractions of 20% to 40% demonstrate a remarkable improvement on the preciseness of torque gain which broadens the area of possible experimental operations on steel slurries in order to reliably characterize transient behavior of the material by e.g. creep, relaxation and oscillation experiments.

• Periodical: Solid State Phenomena (Volumes 192-193)
• Pages: 359-364
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.192-193.359
• Online since: October 2012
• Authors: Michael Modigell, Torsten Volkmann, Christoph Zang
• Keywords: Flow Behavior, High-Temperature, Rheology, Rheometry, Semi-Solid, Steel, Thixoforming

References

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