| About this Abstract |
| Meeting |
Materials Science & Technology 2020
|
| Symposium
|
Micro- and Nano-Mechanical Behavior of Materials
|
| Presentation Title |
In Situ Nanomechanics of Ni-based Superalloys and Bond Coating: Effect of Temperature |
| Author(s) |
Sanjit Bhowmick, Eric Hintsala, Douglas Stauffer |
| On-Site Speaker (Planned) |
Sanjit Bhowmick |
| Abstract Scope |
High-strength structural materials such as Ni-based superalloys and diffusion bond coats are widely used in challenging environments and with exposure to mechanical fatigue, particle impact, and erosion at elevated temperatures. Diffusion platinum-aluminide bond coats are an example of compositionally and microstructurally graded coatings with significant variation in engineered mechanical properties across the cross-section. In this study, an SEM nanomechanical instrument with an integrated high-temperature stage and an active tip heating was used to conduct pillar compression of aluminide bond coating and substrate at room temperature to well above 800degC. This is the first study of an in situ nanomechanical testing of any sample at such higher temperature with capturing deformation events in detail at that temperature. With combined analysis of chemistry and microstructural changes, the results were used to understand local mechanical properties variation as a function of temperature. |