| Autor: |
Yan, Jinge, Liu, Tie, Liao, Jing, Sun, Jinmei, Guo, Xiaoyu, Ren, Zhongming, Wang, Qiang |
| Předmět: |
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| Zdroj: |
Metallurgical & Materials Transactions. Part A; 2021, Vol. 52 Issue 2, p726-740, 15p |
| Abstrakt: |
The solute migration behavior in the mushy zone of an Al-18 at. pct Ni alloy under a high magnetic field was investigated experimentally. Quenching experiments were carried out under different magnetic fields after thermal stabilization. Directional solidification experiments were conducted to explore the precipitation mechanism. A high magnetic field affected the solute migration in the mushy zone significantly. When exposed to a magnetic field, the original cellular-like peritectic Al3Ni changed into an irregular block shape, with many precipitated small dendritic Al3Ni phases, which have not been observed previously. Directional solidification experiments proved that the dendrite phase precipitated during quenching. The application of a magnetic field resulted in the original straight and clear peritectic interfaces becoming uneven and rugged. A coupling of Lorentz, thermoelectromagnetic, and magnetic forces was proposed to explain solute migration in the mushy zone. This coupling hindered the original solute transport behavior and crystal growth mechanism, induced melting and solidification along the transverse direction, and produced many Ni-rich droplets and concentrated Ni atoms at the peritectic interface during thermal stabilization. This study enriches the influence mechanism of high magnetic fields on the solidification of peritectic alloys and provides the possibility for further microstructure and alloy property regulation. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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