About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
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Symposium
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Advanced Characterization Techniques for Quantifying and Modeling Deformation
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Presentation Title |
Deformation Micromechanisms in Different Generation Ni-Based Single Crystal Superalloys During Tensile Testing |
Author(s) |
Benoit Mansoz, Pierre Caron, Jonathan Cormier, Florence Pettinari-Sturmel |
On-Site Speaker (Planned) |
Florence Pettinari-Sturmel |
Abstract Scope |
The chemical composition of Ni-based single crystal superalloys plays an important role in their low temperature tensile behavior. In fact, significant yield strength differences and high work hardening rates have been reported for some specific alloys. To better understand the mechanisms involved in the early stages of plastic deformation at low and intermediate temperatures, Ni-based single crystal superalloys with different chemical compositions (including PWA 1480, CMSX-4 Plus, TMS-238 and TROPEA) were tensile tested in the range 650°C – 950°C / 5.0 x 10-4 s-1. Large yield strength differences, up to 250 MPa, were highlighted by the tensile tests as well as a high work hardening rate for PWA 1480 and TMS-238 alloys. TEM observations were performed on the various Ni-based superalloys on tested specimens strained at 0.5% and 1% of plastic deformation. In addition, TEM tensile tests were performed at 650°C. Relationships between dislocation structures and tensile behavior are discussed. |
Proceedings Inclusion? |
Planned: |
Keywords |
Characterization, Copper / Nickel / Cobalt, Mechanical Properties |