Effect of (Ti + V)B2 on the Grain Structure of Al–7Si Alloy

• Published in: Transactions of the Indian Institute of Metals Vol. 76; no. 10; pp. 2765 - 2771
• Main Authors: Ruan, Qilin, Meng, Chuanchao, Xie, Zonghua, Zushan Tao, Wu, Jianqiang, Peng, Yuchen, Tang, Hongqun, Chen, Ping
• Format: Journal Article
• Language: English
• Published: New Delhi Springer India 01.10.2023; Springer Nature B.V
• Subjects: Aluminum base alloys; Chemistry and Materials Science; Core-shell structure; Corrosion and Coatings; Grain refinement; Grain size; Grain structure; Intermetallic phases; Materials Science; Metallic Materials; Original Article; Titanium; Tribology; Vanadium; Heterogeneous nucleation; (Ti + V)B; Grain refiner; Al–7Si alloy
• ISSN: 0972-2815; 0975-1645
• DOI: 10.1007/s12666-023-02954-w

A new refiner containing (Ti + V)B 2 phase was prepared in this study. It consists of a special VB 2 –TiB 2 core–shell structure, and the size of most (Ti + V)B 2 granular phase is between 100 and 500 nm. Considering Al–7Si alloy as the research object, the refining ability of Al–Ti–B, Al–V–B, and Al–(Ti + V)–B was compared under the condition of same content of added B. The grain refiner containing (Ti + V)B 2 can significantly reduce the grain size of Al–7Si. Al–(Ti + V)–B refines the as-cast grain size from 854.6 ± 28 to 136.93 ± 2.45 μm, which is better than the results obtained for Al–Ti–B- and Al–V–B-based refiners.