About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Dynamic Behavior of Materials IX
|
Presentation Title |
On Phase Transformation in the Weak Shock Regime |
Author(s) |
Neil K. Bourne, George T Gray, Saryu Fensin |
On-Site Speaker (Planned) |
George T Gray |
Abstract Scope |
The limits of elastic behaviour change with the nature of the impulse applied to a target and the size of volume interrogated by a measurement, since it is the pre-existing defects sampled within its rise that determine the response observed. Above the ultimate shear strength of a material during shock (the Weak Shock Limit - WSL) dislocations are homogeneously nucleated and the shock front becomes supersonic. In the inhomogeneous flow up to this stress, local shear triggers martensitic phase transformation and the presence of contained interstitials triggers bulk transitions in the solid. We shall discuss loading of the metals BCC Iron and HCP Titanium through the weak shock regime and into the strong and discuss the onset of transformation in these materials under shear at lower stresses. |
Proceedings Inclusion? |
Planned: |
Keywords |
Phase Transformations, Iron and Steel, |