Fine-Grained Tungsten Heavy Alloy by Mechanical Alloying with Yttrium Oxide Addition

In this paper, the microstructure and mechanical properties of yttrium oxide dispersed 90W-7Ni-3Fe alloy were studied. The 90W-7Ni-3Fe nano-crystalline composite powder dispersed with Y2O3 addition was firstly fabricated by MA process, and then the powder was pressed and sintered at 1480°C for 30 min. A fine-grained 90W-7Ni-3Fe alloy with high tensile strength and elongation properties was obtained, in which the tungsten grain size was 8-12μm, the maximum tensile strength was 1050 MPa and the elongation was 30%. The Influence of rare earth oxide Y2O3 on the mechanical properties and microstructure characteristics is discussed in detail herein.