Version 1
: Received: 31 October 2024 / Approved: 31 October 2024 / Online: 1 November 2024 (10:54:22 CET)
How to cite:
Temesi, O. K.; Karacs, A.; Chinh, N. Q.; Varga, L. K. Thermal Softening Measurements of Refractory High Entropy Alloys. Preprints2024, 2024102597. https://doi.org/10.20944/preprints202410.2597.v1
Temesi, O. K.; Karacs, A.; Chinh, N. Q.; Varga, L. K. Thermal Softening Measurements of Refractory High Entropy Alloys. Preprints 2024, 2024102597. https://doi.org/10.20944/preprints202410.2597.v1
Temesi, O. K.; Karacs, A.; Chinh, N. Q.; Varga, L. K. Thermal Softening Measurements of Refractory High Entropy Alloys. Preprints2024, 2024102597. https://doi.org/10.20944/preprints202410.2597.v1
APA Style
Temesi, O. K., Karacs, A., Chinh, N. Q., & Varga, L. K. (2024). Thermal Softening Measurements of Refractory High Entropy Alloys. Preprints. https://doi.org/10.20944/preprints202410.2597.v1
Chicago/Turabian Style
Temesi, O. K., Nguyen Q. Chinh and Lajos K. Varga. 2024 "Thermal Softening Measurements of Refractory High Entropy Alloys" Preprints. https://doi.org/10.20944/preprints202410.2597.v1
Abstract
A home-built equipment will be presented able to measure thermal expansion and indentation up to 1100 oC. The principle of operation is similar to that of Rockwell hardness measurement. First, we apply a small load and measure the thermal expansion of the construction consisting of the sample holder quartz tube, the conical in-denter and the sample. Then we repeat the thermal cycle with such a high load that produces a deviation in thermal expansion already after 200-300 oC, compared to the previous thermal expansion measurement with low load. With increasing temperature, the indentation depth increases and at higher temperatures we already notice a contraction. The evolution of indentation depth as a function of temperature, d(T), we can obtain by sub-tracting the high load curve from the low load curve. Newly created phenomenological expressions will be tested to describe the thermal softening of pure metals and refractory HEAs. The results will be interpreted taking into account the allotropic transformations and temperature dependencies of elastic moduli. We are working on the instrument to extend the working temperature up to 1200 oC.
Keywords
temperature dependence of mechanical properties; elastic moduli; yield stress and hardness; thermal expansion; softening and allotropic phase transformations; refractory high entropy alloys
Subject
Physical Sciences, Condensed Matter Physics
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
