About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Materials Under Extreme Environment
|
| Presentation Title |
Coupled Extremes in Nanoindentation: Temperature and Strain Rate Effects in Structural Materials |
| Author(s) |
Kevin Schmalbach, Eric Hintsala, Sanjit Bhowmick |
| On-Site Speaker (Planned) |
Kevin Schmalbach |
| Abstract Scope |
Next generation structural materials need to endure coupled extremes in service, including high temperatures and mechanical loading. While bulk scale testing has been used to investigate some of these coupled extremes for many years, measuring these at the small scale has been a relatively larger challenge. Here, we report the investigation of mechanical properties at the micron scale with Berkovich nanoindentation performed at high strain rates (>100 1/s) while at high temperatures. This allows us to simultaneously investigate the high strain rate deformation behavior, the temperature dependence of mechanical properties, and the strain rate sensitivity of the investigated material. Tungsten is used both as a model system and because of its use in many high temperature refractory alloys. Changes in material properties with strain rate and temperature will be discussed, as well as challenges and outlooks on the applications of the technique. |