|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Friction Stir Welding and Processing IX
||Microstructural Analysis and Mechanical Properties of Friction Stir Back Extruded/Aged 7075 Aluminum Alloy
||Zeren Xu, Fadi Abu-Farha
|On-Site Speaker (Planned)
Friction stir back extrusion (FSBE) was applied to commercial 7075-T6 aluminium alloy rods. Microstructural analysis performed across the tube thickness indicated refined and recrystallized grain structure in the processed region, and elongated-deformed grains in the thermo-mechanically affected zone (TMAZ). Grain size and average aspect ratio were analyzed in different regions in the processed tubes to quantify the microstructural changes and correlate that to microhardness measurements. Grain structure inhomogenities were noted both along the extrusion and the transverse directions of the tubes. Fine grain structure was achieved at locations subject to high accumulated shear deformation; ultrafine grains were noted in highly deformed regions. Microtexture analysis via EBSD indicated shear type texture. Microhardness testing and tensile testing with DIC were used to quantify the effects of FSBE on the as-processed samples as well as post-aged samples. The microstructure and mechanical properties of processed/aged samples are discussed in detail.
||Planned: Stand-alone book in which only your symposium’s papers would appear (indicate title in comments section below)