|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Dynamic Behavior of Materials VIII
||Evaluation of High Strain Rate Plastic Flow Behaviour of Nanocrystalline Nickel Using Ultra Fast Nanoindentation Test System
||Sundararajan Govindan, Sudharshan Phani, Suresh Babu, Nitin Wasekar
|On-Site Speaker (Planned)
Recent advances in electronics have enabled nanomechanical measurements with very low noise levels at fast time constants and high data acquisition rates. These capabilities open the doors for a wide range of ultra-fast nanomechanical testing, for instance, step or impulse load indentation testing wherein the load is ramped in less than a millisecond to access a range of very high strain rates (up to 4000 1/s) in a single indentation test. This in combination with the conventional constant load and hold indentation test enables access to a wide range of strain rates (10-3-103 1/s). This methodology is specifically useful to determine the high strain rate response of coatings where conventional testing techniques are not feasible. In this talk, we present the strain rate dependence of hardness of pulsed electrodeposited nanocrystalline nickel over a wide range of strain rates to assess the strain rate dependence of grain boundary strengthening mechanism.
||Planned: Supplemental Proceedings volume