Microstructure and micro-texture evolution during large strain deformation of an aluminium–copper–lithium alloy AA 2195

Article history: Received 12 July 2014 Accepted 11 September 2014 Available online 20 September 2014 A single hit, hot isothermal plane strain compression (PSC) test was used to understand the microstructural evolution during large strain deformation of aluminium–copper–lithium alloy AA 2195. Hot isothermal PSC tests were conducted in the temperature range of 300–450 C and at strain rates of 0.01 s 1 and 1 s 1 with 75% thickness reduction. The flow curves during PSC exhibited weak softening at higher temperatures and dipping of the flow curve at a strain rate of 1 s . Electron backscattered diffraction analysis (EBSD) of the PSC tested samples revealed that dynamic recrystallisation occurs in specimens deformed at higher temperatures and lower strain rates. It is possible to control the grain size in AA 2195 through the optimization of temperature and strain rate during thermo-mechanical processing. 2014 Elsevier Ltd. All rights reserved.