High temperature properties of advanced directionally-solidified high entropy superalloys

Te Kang Tsao, An Chou Yeh, Jien Wei Yeh, Mau Sheng Chiou, Chen Ming Kuo, H. Murakami, Koji Kakehi

研究成果: Conference contribution

2 被引用数 (Scopus)


High-Entropy-Superalloys (HESA) with good cost-performance has been proposed. In present work, the high temperature phase stability, oxidation, hot corrosion and mechanical properties of HESA alloys were studied. The microstructure of HESA is composed of stable FCC γ matrix and L12 γ′ precipitates, and both γ and γ′ phases are highly alloyed. This γ/γ′ microstructure can remain stable after long term exposure at inter-mediate to high temperatures. With respect to surface stability, HESAs show high Al and Cr activities to form either protective Al2O3 or Cr2O3 rapidly. With minor additions of refractory elements, the high temperature hardness of HESA can be higher than that of conventional superalloy. HESAs show comparable tensile strength and creep rupture properties comparing to that of commercial superalloys. Furthermore, their densities are below 8.0 g.cm-3, and the cost of raw materials can be 20 % cheaper than that of CM247LC. Therefore, the potential of HESAs for high temperature applications are revealed in present article.

ホスト出版物のタイトルSUPERALLOYS 2016 - Proceedings of the 13th International Symposium on Superalloys
編集者Mark Hardy, Eric Huron, Uwe Glatzel, Brian Griffin, Beth Lewis, Cathie Rae, Venkat Seetharaman, Sammy Tin
出版社Minerals, Metals and Materials Society
出版ステータスPublished - 2016
イベント13th International Symposium on Superalloys, SUPERALLOYS 2016 - Seven Springs, United States
継続期間: 2016 9月 112016 9月 15


名前Proceedings of the International Symposium on Superalloys


Other13th International Symposium on Superalloys, SUPERALLOYS 2016
国/地域United States
CitySeven Springs

ASJC Scopus subject areas

  • 材料科学一般
  • 凝縮系物理学


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