|About this Abstract
||2019 TMS Annual Meeting & Exhibition
||Aluminum Alloys, Processing and Characterization
||D-65: Microstructure and Surface Finish Evolution During Incremental Sheet Forming of AA 7075
||Maya Nath, Ankush Bansal, Jaekwang Shin, Randy Cheng, Mihaela Banu, Alan Taub
|On-Site Speaker (Planned)
Incremental Sheet Forming (ISF) is a die-less sheet forming process where a rigid tool moves along a pre-defined tool path, deforming the sheet locally until the final geometry is formed. As compared to conventional forming processes such as stamping or deep drawing, ISF offers cost savings for small volume production as large presses and dies are not needed. We have been investigating optimizing process parameters, formability, mechanical properties, microstructure and surface finish of incrementally formed parts. For this study, sheets of AA 7075-O were formed into cones, funnels and “heart-shaped” parts by ISF and characterized for microstructure, texture and surface finish. As-formed components exhibited surface features and cracks, which appeared to initiate through and around second-phase particles. Results from finite element modeling were compared with experimental data to further study bulk geometric deviations and the impact of strain history on texture evolution.
||Planned: Light Metals