About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Dynamic Behavior of Materials IX
|
Presentation Title |
Contrasting the Shock Response of Typical Face Centred Cubic and Body Centred Cubic Single Crystals |
Author(s) |
Jeremy C F Millett, Saryu Fensin, Yu-Lung Chiu, Glenn Whiteman, George Gray |
On-Site Speaker (Planned) |
Jeremy C F Millett |
Abstract Scope |
The behaviour of metals under mechanical loading (including the extremely high strain-rates experienced during shock loading) are influenced at the most fundamental level by the crystalline structure. In this presentation, we examine how representative examples of face centred cubic (aluminium) and body centred cubic (tantalum) single crystals respond to quasi-static and shock loading conditions, both in terms of their mechanical properties and microstructural development. Results show that the response of aluminium is as would be expected from consideration of the relevant Schmid factors whilst tantalum shows a significant non-Schmid response. Deformation in the aluminium was via by dislocation generation, but strongly controlled by orientation to the loading axis, with dislocation density increasing from [100] to [110] to [111] as ease of dislocation motion decreased. In the case of tantalum, twin formation became increasing dominant above a shock pressure of 15 GPa. |
Proceedings Inclusion? |
Planned: |
Keywords |
Aluminum, Other, Other |