Effect of deformation temperature and degree on tensile properties of the extruded 2024Al/Al18B4O33w composite with extrusion – forging multistage hot deformation

Abstract

AbstractThe effect of extrusion – forging multistage hot deformation on tensile properties of the 2024Al/Al18B4O33w composites is investigated. The extruded 2024Al/Al18B4O33w composites are used as blanks. The tensile properties of the extruded 2024Al/Al18B4O33w composite followed by secondary deformation are studied. The effects of holding temperature and deformation degree on tensile properties of the extruded composite are discussed. The results show that due to the reduction in stress concentration and dislocations, ultimate tensile strength of the extruded 2024Al/Al18B4O33w composite held at 400 °C for 1 h is lower than that of the extruded composite without holding. Increasing holding temperature from 300 °C to 450 °C, ultimate tensile strength of the extruded 2024Al/Al18B4O33w composite increases firstly and then decreases. The extruded 2024Al/Al18B4O33w composite held at 400 °C for 1 h followed by secondary forging with the larger length to width ratio of 4 : 1 has the ultimate tensile strength of 456.1 MPa, higher than that of the extruded 2024Al/Al18B4O33w composite without secondary forging.