单晶高温合金研究进展

Research progress in single crystal superalloys

摘要

单晶高温合金具有优异的综合性能，在先进航空发动机上获得广泛应用。本文综述了单晶高温合金强化机制与成分设计、定向凝固与晶体生长、固态相变与热处理以及力学行为方面的发展，重点介绍了北京航空材料研究院具有我国自主知识产权的高性能、低成本单晶高温合金的发展，探讨了单晶高温合金的发展方向。

Abstract

Single crystal superalloys exhibit excellent comprehensive properties and have been widely applied in advanced aero-engines. This paper reviews the development of single crystal superalloys from the aspects of strengthening mechanism and composition design，directional solidification and crystal growth，solid-state phase transformation and heat treatment and mechanical behaviour. Special emphasis is placed on the research progress of the high-performance， low-cost single crystal superalloys with independent intellectual property rights of China developed by Beijing Institute of Aeronautical Materials， and future development direction of single crystal superalloys are discussed.

关键词

单晶高温合金 / 强化机制 / 成分设计 / 定向凝固 / 晶体生长 / 热处理 / 力学行为

Key words

single crystal superalloy / strengthening mechanism / composition design / directional solidification / crystal growth / heat treatment / mechanical behaviour

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