MSE 2024
Lecture
25.09.2024 (CEST)
Abnormal grain growth to achieve resource-saving and creep-resistant ferritic oxide-dispersion-strengthened high-temperature alloys
MM

Dr. Michael Mayer

Materials Center Leoben Forschung GmbH

Mayer, M. (Speaker)¹; Bártková, D.²; Ressel, G.¹; Svoboda, J.²
¹Materials Center Leoben Forschung GmbH; ²Academy of Science of the Czech Republic, Brno (Czech Republic)
Vorschau
20 Min. Untertitel (CC)

Future green technologies still strongly rely on high-temperature alloys but many of these state-of-the-art alloys include critical as well as strategic raw materials posing a threat to achieving the energy transition goals. As a result, a novel ferritic alloy surpassing state-of-the-art alloys in their creep resistance while using only a small percentage of critical elements is presented. The high creep resistance is achieved by small oxide dispersions incorporated into a ferritic matrix with millimeter-sized grains. The latter property is a result of abnormal grain growth in order to overcome the pinning effect of the small nanometric oxide particles and requires precise process control. The presented results demonstrate a new alloying concept without the dispensable use of critical alloying elements and shed light on the process of obtaining oxide-dispersion-strengthened materials with abnormally large grains.

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