Abstract
The effects of adding Ti with 0, 0.47 and 0.89 (wt%) on the microstructure and properties of the new Al-2.87Cu-3.83Mg-2.91Zn-0.2Zr-xTi cold extruded heat-resistant aluminum alloy materials are studied. The results show that after cold extrusion, 480 °C × 2 h solution treatment and 120 °C × 12 h aging, with the increase of Ti content, the internal undissolved phase of the alloy increase, grain refine, room temperature strength and heat resistance also improved. The alloy with 0.89Ti has the highest strength, and its hardness and electrical conductivity are 160.8HV and 23.56% IACS, respectively. Compared with the alloy without Ti, the tensile strength at room temperature is increased by 73.08 MPa, reaching 471.55 MPa, and the elongation after fracture is 16.67%. The peak value of hot compression at 250 °C increase by 86.57 MPa, reaching 326.66 MPa. At the same time, the alloy also has good resistance to intergranular corrosion, and the maximum intergranular corrosion depth is 146.31 μm.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
