Influence of thermal stabilization on the solute concentration of the melt in directional solidification |
| |
Authors: | Dongmei Liu Yanqing SuXinzhong Li Liangshu LuoJingjie Guo Hengzhi Fu |
| |
Affiliation: | School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China |
| |
Abstract: | Experiments on Al–25 at%Ni peritectic alloy consisting of melting followed by thermal stabilization ranging from 0 to 2 h were carried out in a Bridgman-type furnace. Temperature distribution, microstructure evolution and solute concentration in the mushy zone are characterized. An analytical model is proposed to evaluate the Ni concentration of the melt after thermal stabilization. Effect of temperature gradient and volume fraction of liquid phase in the mushy zone on the Ni concentration of the melt is discussed. The steady state Ni concentration of the melt is inappropriately below the initial Ni concentration of the sample. The deviation increases with decreasing temperature gradient. Finally, the influence of thermal stabilization on the solute concentration of the melt is discussed based on a comparison of Al–Ni peritectic alloys with Al–Ni hyper-eutectic alloys and Al–Cu hypo-eutectic alloys. |
| |
Keywords: | A1 Directional solidification A1 Melt A1 Thermal stabilization B1 Aluminium alloys |
本文献已被 ScienceDirect 等数据库收录! |