Microstructural and Wear Resistance Evolution of Al X (tivzr) 100-X Lightweight High-Entropy Alloys

To solve the problem of high density of wear-resistant high-entropy alloys (HEAs), three Al x (TiVZr) 100-x HEAs (Al25, Al30 and Al35 )were researched. Results indivocated that the Al x (TiVZr) 100-x HEAs consisted of solid solution phases and Al 1 (Zr,Ti,V) 1 precipitates with content of 1.91%/Al25, 3.82%/Al30 and 4.85%/Al35. As the matrix hardness of Al25, Al30 and Al35 was approximately 1.60 times of TC4 alloy. Aside, the micro-cutting behaviour was weakened by the Al 1 (Zr,Ti,V) 1 precipitates for their high hardness and the semi-coherent relationship with the matrix. Therefore, the relative wear resistance of Al25, Al30 and Al35 to TC4 was 2.10, 2.94 and 3.42, respectively. More notably, the enhancement of wear resistance of AlTiVZr alloys induced by Al 1 (Zr,Ti, V) 1 precipitates was considerably greater than that by the matrix hardness.