Tensile Deformation Behavior of Ultrasonically Consolidated Laminated Ti-Al Composites at Warm Forming Temperatures

Abstract

The objective of the present study is to characterize the mechanical behavior of laminated metal composites(LMCs) that consist of commercially pure titanium and 1100 aluminum layers which were ultrasonicallyconsolidated. Ultrasonic consolidation is a low temperature process used to fabricate layered solid metalstructures. Tensile tests of Ti-Al laminated composites (in 3, 5, and 7 bilayer configurations) were performedat four various temperatures (25 oC, 100 oC, 200 oC, and 300 oC) using strain rate of 0.017 /s. The effect oftemperature, sonotrode travel direction, and number of layers on the material behavior were discussed on thebasis of uniaxial tensile test results. The ultimate tensile strength and yield strength is found to decrease withincreasing temperature. In general, high strain values were obtained in Y samples compared to X samples.The maximum strain value was 0.42 at 300 °C temperature in the 5 bilayer Y sample.