【摘要】 镍基单晶高温合金具有优异的高温综合性能，是航空发动机涡轮叶片和导向叶片等部件的首选材料，承受高温度和高应力的严苛服役环境。目前，高冷效叶片的结构设计中采用多种复杂冷却结构以提高其承温能力，其中以层板冷却和双层壁冷却为代表的微型冷却结构是其主流发展方向。但由于这类复杂涡轮叶片中存在超薄壁结构，已成为叶片制造的关键点和难点。本文综述了镍基单晶高温合金薄壁结构的发展趋势，分析了薄壁受限空间的缺陷产生及枝晶生长规律，阐述了薄壁结构对力学性能的影响，展望了先进涡轮叶片的制备及其组织控制的发展趋势。更多还原

【Abstract】 With outstanding comprehensive performance at high temperature, nickel-based single crystal superalloy is the preferred material for aero-engine turbine blades, vanes and other components to withstand challenging service environment subjected to high temperature and intense stress. At present, various complex cooling structures are often used in the design of high-efficiency cooling blades to enhance blade temperature tolerance. Among them the micro-cooling structure represented by lamilloy and double wall cooling are the main trend. However, the existence of ultra-thin wall structures in these complex turbine blades has become critical aspect and challenge in blade manufacturing. This paper provided an overview of the development trends in thin-walled structure of Ni-based single-crystal super alloys, analyzed the defects arising from thin-walled constrained space and the law of dendrite growth, elaborated the influence of thin-walled structure on mechanical properties and provided a prospect on advanced turbine blade preparation and development trend of its microstructure regulation.更多还原