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 ultrasonically consolidated.  Ultrasonic consolidation is a low temperature process used to fabricate layered solid metal structures. Tensile tests of Ti-Al laminated composites (in 3, 5, and 7 bilayer configurations) were performed at four various temperatures (25 ºC, 100 ºC, 200 ºC, and 300 ºC) using strain rate of 0.017 /s. The effect of temperature, sonotrode travel direction, and number of layers on the material behavior were discussed on the basis of uniaxial tensile test results. The ultimate tensile strength and yield strength is found to decrease with increasing 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.

Keywords

• Laminated metal composites,ultrasonic consolidation,Ti-Al composites,ultrasonic welding,mechanical characterization,warm forming

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