|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Aluminum Alloys, Processing and Characterization
||Characterization and Constitutive Modelling of AA 7075 for Hot Blank-cold Die Stamping
||Gopinath Kannadasan, Fadi Abu-Farha, Zeren Xu
|On-Site Speaker (Planned)
Hot Blank-Cold Die (HB-CD) stamping, otherwise known as Hot Stamping or Press Hardening for boron steels, has been gaining significant interest as a potentially viable process for forming automotive structural components out of high strength heat-treatable aluminum alloy sheets. In this paper, AA 7075 selected aluminum alloy is tensile tested in hot stamping conditions over a range of temperature (25 to 450oC) and strain rate (0.001 to 0.1s-1) using enhanced strain measuring technique like Digital Image Correlation (DIC). The effect of temperature and deformation on grain size is studied through Electron Back Scattered Diffraction (EBSD) and optical microscopy. The dynamic softening flow behavior observed at high temperature was modeled through a constitutive equation. The constants measured were independent of the deformation. The flow curves obtained through constitutive equation were in good agreement with experimental results. The phenomenological constitutive equation offers a basic model for plastic deformation at hot stamping conditions.
||Planned: Light Metals