Microstructural Feature and Evolution of Rapidly Solidified Ni3Al-Based Superalloys
来源期刊：Acta Metallurgica Sinica2019年第6期
论文作者：Ye-Fan Li Chong Li Jing Wu Hui-Jun Li Yong-Chang Liu Hai-Peng Wang
文章页码：764 - 770
摘 要：The Ni3Al-based superalloy was rapidly solidified in the form of droplets with varying diameters. The cooling rate（Rc） is a function of diameter（D） of droplet. With the decrease in droplet sizes（increase in the cooling rates）, the volume fraction of γ’+γ eutectic structure increases from 21.31(D = 1400 lm, Rc= 3.6 9 102 K s-1) to 36.31%(D = 270 lm, Rc-= 2.3 9 103 K s-1). Moreover, unimodal size distribution of nano-γ’ exists in the droplets instead of bimodal dual-size distributions of γ precipitates that are normal in as-cast alloys.
Ye-Fan Li1，Chong Li1，Jing Wu1，Hui-Jun Li1，Yong-Chang Liu1，Hai-Peng Wang2
1. State Key Lab of Hydraulic Engineering Simulation and Safety, School of Materials Science and Engineering, Tianjin University2. Department of Applied Physics, School of Science,Northwestern Polytechnical University
摘 要：The Ni3Al-based superalloy was rapidly solidified in the form of droplets with varying diameters. The cooling rate（Rc） is a function of diameter（D） of droplet. With the decrease in droplet sizes（increase in the cooling rates）, the volume fraction of γ’+γ eutectic structure increases from 21.31(D = 1400 lm, Rc= 3.6 9 102 K s-1) to 36.31%(D = 270 lm, Rc-= 2.3 9 103 K s-1). Moreover, unimodal size distribution of nano-γ’ exists in the droplets instead of bimodal dual-size distributions of γ precipitates that are normal in as-cast alloys.
关键词：
