About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Dynamic Behavior of Materials IX
|
Presentation Title |
Dynamic Non-equilibrium Plastic Flow of Metals under Rapid Heating |
Author(s) |
Steven P. Mates |
On-Site Speaker (Planned) |
Steven P. Mates |
Abstract Scope |
Metals that are heated to temperatures high enough to cause their microstructures to evolve, via dissolving or growing precipitates or wholesale phase transformations, may exhibit non-equilibrium mechanical behavior if the heating-plus-deformation time is short, but of the same order as, the transformation time. A rapidly-heated Kolsky Bar method is used to study this type of non-equilibrium behavior and to explore the possible influences on dynamic, plastic events where temperatures may exceed transformation thresholds by adiabatic and frictional heating but where heating and cooling rates are extremely high. Examples of non-equilibrium dynamic flow stress are presented for AISI 1045 carbon steel, aluminum alloy 6061-T6 and 17-4 PH (precipitation-hardenable) stainless steel. Details of the experimental method are discussed, and heating rate limitations for our compression and tension Kolsky bar setups are explored. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Phase Transformations, Iron and Steel |