About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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High Temperature Creep Properties of Advanced Structural Materials
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Presentation Title |
Creep Behavior at Elevated Temperatures of Several Polycristalline Ni-based Superalloys Strengthened by MC-carbides |
Author(s) |
Patrice Berthod, Safa Tlili, Dame Assane Kane |
On-Site Speaker (Planned) |
Patrice Berthod |
Abstract Scope |
Conventional casting allows producing components with complex geometries and coarse grains favorable for good creep resistance at high temperatures. Their weak points are generally their intergrains and interdendrites boundaries. Introducing carbon and MC-former metals can achieve the development of an intergranular and interdendritic network of eutectic carbides bringing the double benefit of a script-like geometry for the interdendrites cohesion, and of a good morphological and volume fraction stability on long times at high temperature.
In this work two kinds of superalloys were obtained by high frequency induction foundry under inert atmosphere. The first ones are nickel-based superalloys and reinforced by ZrC carbides. The second ones are also nickel-based alloys but strengthened by (Ta,Hf)C carbides. All were subjected to 3-points bending creep tests at 1100°C for a maximal induced tensile stress equal to 20 MPa. They demonstrated high resistance despite the test temperature particularly high for superalloys produced by classical foundry. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Temperature Materials, Mechanical Properties, Sustainability |