About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
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Environmentally Assisted Cracking: Theory and Practice
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Presentation Title |
Effect of Strain Rate and Grain Size on the Oxidation-Assisted Intergranular Cracking of the Alloy 718 at 650 °C |
Author(s) |
Malo Jullien, Damien Texier, Repayah Black, Jean-Charles Stinville, Marc Legros |
On-Site Speaker (Planned) |
Damien Texier |
Abstract Scope |
The Ni-based superalloy Alloy 718 (Inconel 718) is an excellent alloy candidate for structural components operating at intermediate temperatures. In the past decades, its mechanical behavior and damage behavior has been intensively investigated at high temperature to establish a relationship between its strain-rate sensitivity and its oxidation-assisted intergranular cracking (OAIC). The present study focuses on the effect of both the strain rate and the grain size effects on strain localization partitioning at GBs, TBs and intergranular at 650 °C, in the Portevin-Le-Chatelier (PLC) and non-PLC domains. HR-DIC analysis and out-of-plane measurements were performed to quantify plasticity distribution and preferential cracking site at the microstructure scale depending on the strain rate. Changes in strain localization with the grain size and strain rate demonstrated the concomitant action of strain localization and environmental degradation on the OAIC. |
Proceedings Inclusion? |
Planned: |
Keywords |
Environmental Effects, High-Temperature Materials, Characterization |