Abstract
The creep behavior of the oxide-dispersion-strengthened alloy GRX-810 fabricated by powder coating followed by laser-powder-bed fusion was evaluated via constant-stress, constant-heating-rate (CSCHR) tension testing using stresses of 69, 97, 121, and 173 MPa and a heating rate of 75 °C/min. Arrhenius plots derived from CSCHR strain-versus-temperature measurements revealed an apparent activation energy which increased with increasing stress. These findings were interpreted in terms of the effect of temperature on the threshold stress for creep deformation.
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Acknowledgments
This work was conducted as part of the in-house research of the Air Force Research Laboratory’s Materials and Manufacturing Directorate. Technical discussions with Dr. A.A. Salem and the experimental assistance of P.N. Fagin are gratefully acknowledged. Three of the authors (SLS, NCL, AMF) were supported under the auspices of Air Force Contract FA8650-21-D-5270.
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Semiatin, S.L., Levkulich, N.C., Faith, A.M. et al. The Constant-Stress, Constant-Heating-Rate Behavior of an Additively Manufactured ODS Superalloy. Metall Mater Trans A (2024). https://doi.org/10.1007/s11661-024-07378-9
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DOI: https://doi.org/10.1007/s11661-024-07378-9