| About this Abstract |
| Meeting |
2010 TMS Annual Meeting & Exhibition
|
| Symposium
|
General Abstracts: Structural Materials Division
|
| Presentation Title |
Comparison of Deformation Mechanisms for Constant Strain Rate and Creep Testing of a Ni-based Superalloy |
| Author(s) |
Hallee Z. Deutchman, Raymond R. Unocic, Michael J. Mills |
| On-Site Speaker (Planned) |
Hallee Z. Deutchman |
| Abstract Scope |
The effect of microstructure, stress, temperature, and strain rate on deformation mechanisms were investigated under creep and constant strain rate conditions on an advanced, polycrystalline Ni-based disk superalloy. A detailed microstructure characterization aimed at measuring the gamma-prime precipitate size, morphology, distribution as well as grain size and degree of grain boundary serration was performed prior to mechanical testing experiments so that the effects of microstructure can be correlated with the deformation response. Constant load creep tests and constant strain rate tests were performed at the same temperature so that the influence of strain rate on deformation substructure can be assessed. Following mechanical testing, a thorough TEM characterization study was done to determine the operative deformation mechanisms. Mechanisms found included microtwinning and isolated faulting of the gamma-prime precipitates. Funding for this work has been provided by AFOSR through the Metals Affordability Initiative (MAI) program. |
| Proceedings Inclusion? |
Definite: A CD-only volume |