| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
|
| Presentation Title |
High Cycle Fatigue Behavior of Haynes 282 Subjected to Accelerated Ageing |
| Author(s) |
Amey Parnaik, Pavan A. H. V., Lakshmi Narayan Ramasubramanian |
| On-Site Speaker (Planned) |
Amey Parnaik |
| Abstract Scope |
This study explores the room temperature high-cycle fatigue behavior of Haynes 282 after accelerated aging at 750, 800, and 850 °C for various durations. Aging enhances γ’ precipitate growth and the formation of M6C and M23C6 carbides, as well as the µ phase, with minimal grain growth. Fatigue strength increases with longer aging at 750 °C and 800 °C, but varies with aging temperature. Analysis of fatigue striation spacings using a finite element model for unnotched bend specimens revealed Paris slopes (m) of 3-4 for aged and unaged samples. The fatigue crack initiation stage, accounting for over 99% of total fatigue life, lengthens with larger γ’ precipitates, except at 800 °C and 850 °C. Deviations are attributed to M6C carbide evolution above 800 °C at the MC/γ interface. The findings have implications for predicting the long-term fatigue strength of Haynes 282 in service. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Copper / Nickel / Cobalt, Mechanical Properties |