| Autor: |
Shangguan, Jingjing, Zhao, Jianhua, Shi, Yu, Gu, Cheng, Jin, Bingyan, Cheng, Jin, Guo, Yu |
| Zdroj: |
International Journal of Metalcasting; 20240101, Issue: Preprints p1-16, 16p |
| Abstrakt: |
The solid–liquid compound casting (SLCC) was used to produce Ti/Mg bimetal via hot dip Zn coating, and the interfacial microstructures and mechanical properties of the Mg/Ti bimetal were investigated in this work. The scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS) reveal that there is no interlayer metallurgical reaction when the pouring temperature is 670 °C. As the pouring temperature increases to 710 and 750 °C, the thickness of the metallurgical interfacial zone is about 130 and 310 µm, respectively. The interfacial zone is mainly consists of α-Mg and τ-TiAlZn coexistence phases. Thermodynamic models are established to explain the evolution mechanism of α-Mg and τ-TiAlZn coexistence phases. It is concluded that the formation process of α-Mg and τ-TiAlZn phase coexist is as follows: TiZn5(s)-to-TiZn5(l), and then α-Mg and τ-TiAlZn phases coexist. While the sequence of the phases that formed in the Ti–Al–Zn ternary system is TiAl3→τ-TiAlZn, this is based on the fact that the Al atoms are used up at the interfacial zone. The highest shear strength of Zn-coated TC4/AZ91D bimetallic material is up to 34.24 Mpa when the pouring temperature is 710 °C. |
| Databáze: |
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