Acta Metallurgica Sinica (English Letters) ›› 2024, Vol. 37 ›› Issue (3): 570-576.DOI: 10.1007/s40195-023-01549-0

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Interfacial Reaction of Ti6Al4V Lattice Structure-Reinforced VW92 Alloy Matrix Composites

Haijun Wang1, Renju Cheng1(), Xianhua Chen2(), Mingbo Yang1, Daiyi Deng1, Lirui Liu1, Yongfeng Zhou1, Yanlong Ma1, Kaihong Zheng3, Fusheng Pan2,3()   

  1. 1College of Materials Science and Engineering, Chongqing University of Technology, Chongqing 400054, China
    2College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
    3Institute of New Materials, Guangdong Academy of Sciences, Guangzhou 510650, China
  • Received:2022-11-20 Revised:2023-01-05 Accepted:2023-01-13 Online:2024-03-10 Published:2023-03-31
  • Contact: Renju Cheng, chengrenju@cqut.edu.cn;Xianhua Chen, xhchen@cqu.edu.cn;Fusheng Pan, fspan@cqu.edu.cn

Abstract:

A novel melting infiltration by ultrasonic vibration was investigated and applied to fabricate Ti6Al4V (TC4) lattice structure-reinforced Mg-10Gd-2Y-1Zn-xZr (refer to VW92 hereafter, x = 0, 0.5 wt%) alloy matrix composites. The edge-to-edge matching model indicates that the well-matching and possible orientation relationships (ORs) between the α-Mg and α-Ti, [10-10]α-Mg//[11-23]α-Ti in (0002)α-Mg//(10-10)α-Ti possesses the smallest misfit of 0.4% (fr), and thus the α-Mg grains can nucleate on the TC4 lattice structure. Interfacial reaction occurred in the TC4/VW92 + 0.5 wt% Zr composites, and the reaction product was confirmed to be Al2Zr3, AlZr2 and α-Ti (Zr) particles formed by continuous solution of Zr-Ti. Among the interfacial products, the AlZr2 phase is a brittle phase with high-volume fraction, which is not conducive to the load transfer. But generally speaking, the α-Ti (Zr) and the α-Mg tend to form a coherent interface, which is beneficial for improving the interfacial bonding strength of composites.

Key words: TC4, VW92 composites, TC4 lattice structure, Interfacial reaction, Mismatch