About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
|
Aluminum Alloys: Development and Manufacturing
|
Presentation Title |
Achieving superior room temperature plasticity in ultra-high strength 6xxx aluminum alloy |
Author(s) |
Atish Ray, Patrick McGannon, Xiao-Xiang Yu, Jiashi Miao, John Carsley |
On-Site Speaker (Planned) |
Atish Ray |
Abstract Scope |
High strength copper containing 6xxx aluminum alloys when processed to their peak strength (e.g. AA6111-T6) possess very limited plasticity, rendering them almost un-formable at room temperature. The extreme strength in this class of material is always accompanied with limited work hardening capacity and typically with lower n-value. At the grain scale, plastic deformation of high strength 6xxx alloy manifests as planar slip with reduced number of active slip systems. Throughout deformation dislocations annihilate and lead to localization of plastic strain at a lower macro-strain as evidenced by a decreased slope of the stage III work hardening curve in a Kocks-Mecking plot. A special processing technique is developed by combining artificial aging with plastic deformation which not only increases the yield strength further but also achieves higher ductility at room temperature. Evolution of early-stage precipitates, their coherency with matrix and interaction of such precipitates with dislocations will be discussed. |
Proceedings Inclusion? |
Planned: Light Metals |
Keywords |
Aluminum, Mechanical Properties, Characterization |