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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Microstructure of plates at different annealing temperatures. (a) annealed at 800 °C for 30 s; (b) annealing at 850 °C for 30 s; (c) annealing at 900 °C for 30 s.