About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Forming and Joining of Advanced Sheet Metal Materials
|
| Presentation Title |
Achieving superior room temperature plasticity in high strength 6xxx aluminum alloy |
| Author(s) |
Atish Ray, Patrick McGannon, Xiao-Xiang Yu, John Carsley |
| On-Site Speaker (Planned) |
Atish Ray |
| Abstract Scope |
Copper containing high strength 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 material class is always accompanied by limited work hardening capacity (n-value less than 0.1). At the grain scale, plastic deformation in high strength 6xxx alloys is accommodated by activation of reduced number of slip systems where plastic localizes early which is evident by lower stage III work hardening curve in a Kocks-Mecking plot. In this work, we demonstrate a mechanism where the microstructure can delocalize the plastic strain and extend overall room temperature plasticity. A unique processing technique combining artificial aging and strain hardening is developed to increase yield strength and ductility simultaneously. Controlling the population of early-stage precipitates and their interaction with dislocations will be discussed in the context of achieving higher strength and higher ductility. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Aluminum, Mechanical Properties, Shaping and Forming |