Microstructure and micro-texture evolution during large strain deformation of an aluminium–copper–lithium alloy AA 2195. (January 2015)

• Record Type: Journal Article
• Authors: Nayan, Niraj; Gurao, Nilesh P.; Narayana Murty, S.V.S.; Jha, Abhay K.; Pant, Bhanu; Sharma, S.C.; George, Koshy M.
• Is Part Of: Materials & design. Volume 65(2015:Jan.)
• Page Start: 862
• Page End: 868
• Publication Date: 2015-01
• Subjects: Materials -- Periodicals; Engineering design -- Periodicals; Matériaux -- Périodiques; Conception technique -- Périodiques; Electronic journals; 620.11
• DOI: 10.1016/j.matdes.2014.09.037
• Languages: English
• ISSNs: 0264-1275

Abstract

Graphical abstract: Highlights: Plane strain compression (PSC) on AA 2195 was conducted. Evolution of microstructural during large strain deformation was studied. Flow curves exhibited weak softening at higher temperatures and dipping of the flow curve at a strain rate of 1 s −1 . Optimization of microstructure and process parameter for hot rolling possible by plane strain compression testing. Dynamic recrystallisation occurs in specimens deformed at higher temperatures and lower strain rates. Abstract: 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 −1 . 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.