A Review on High-entropy Superalloys with FCC/L12 Structure
YAO Hongwei1,2, LU Yiping1, CAO Zhiqiang1, WANG Tongmin1, LI Tingju1
1 Key Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province), School of Material Science and Engineering, Dalian University of Technology, Dalian 116024, China 2 Department of Materials Science and Engineering, Kyoto University, Kyoto 606-8501, Japan
Abstract: Superalloys are unique high-temperature materials widely used in the aerospace and energy industry. The performance of conventional supe-ralloys has been improved by alloying and advanced manufacturing processes during the past decades. However, operating temperatures are now reaching limits posed by the melting temperatures of these materials. Since 2004, a new alloy design and development philosophy—high-entropy alloys (HEAs), or multi-principle-element alloys (MPEAs)—has attracted significant attention. The four core effects of HEAs, including high configurational entropy, sluggish diffusion, severe lattice distortion, and cock-tail effect, are mainly responsible for the various physical and mechanical properties. To develop higher performance of HEAs, precipitation strengthening has been widely applied in HEAs and is proved to be effective in strengthening or toughening. Based on the HEA concept and the coherent microstructure of FCC/L12, a series of high-entropy superalloys (HESAs) has been developed with high strength and long-time microstructural stabilities at high temperatures. However, the work about phase formation of HESAs were few, and the mechanisms of strengthening and deformation still lacked systematic research. In addition, the surface stability of materials at elevated temperature is an important indicator in engineering applications, but there were few studies. Recently, researchers have developed a series of HESAs based on the empirical phase formation rules and computer simulation methods. The effects of morphology and stability for the L12 precipitated phase, the lattice mismatch, etc. on high-temperature performance, such as high strength and creep property were studied. Moreover, the surface stability of some HESAs were investigated in oxidizing and corrosive environments. The present work summarizes the research progress of HESAs. The phase formation, mechanical properties, high temperature oxidation and corrosion are briefly reviewed. Finally, the future perspective of HESAs is prospected.
作者简介: 姚宏伟,2017年6月毕业于太原理工大学,获得硕士学位。现为大连理工大学与日本京都大学联合培养博士研究生,在卢一平教授和乾晴行教授的共同指导下进行研究。目前主要研究领域为高熵合金的成分设计、变形机制以及性能优化。 卢一平,大连理工大学材料科学与工程学院副院长,科技部中青年科技创新领军人才、国家优青、首届“兴辽英才计划”辽宁省青年拔尖人才、大连市杰出青年基金获得者、大连市青年科技之星、中国材料研究学会凝固科学与技术分会理事、副秘书长、空间材料科学与技术分会理事、中国材料研究学会青年工作委员会常务理事、Acta Metallurgica Sinica期刊编委等。近5年谷歌学术总引用近3 000次,H指数29,高被引文章3篇,授权发明专利8项。获2018年度辽宁省自然成果学术成果奖一等奖(排名1)、中国物理学会同步辐射分会“青年之光”论文奖;2019武汉中国材料学会“新材料国际趋势”分会青年科学家论坛“优秀青年科学家奖”;2019中国材料大会“非晶与高熵合金”分会“Outstanding Young Scientist”奖;获2015年度教育部技术发明一等奖(排4)、国家技术发明二等奖(排4)。目前主要从事高熵合金的成分设计理论以及工业化制备技术研究。
引用本文:
姚宏伟, 卢一平, 曹志强, 王同敏, 李廷举. FCC/L12共格高熵高温合金的研究进展[J]. 材料导报, 2020, 34(17): 17041-17046.
YAO Hongwei, LU Yiping, CAO Zhiqiang, WANG Tongmin, LI Tingju. A Review on High-entropy Superalloys with FCC/L12 Structure. Materials Reports, 2020, 34(17): 17041-17046.
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2020, Vol. 34 
