Correlation of precipitate evolution with Vickers hardness in Haynes® 282® superalloy: In-situ high-energy SAXS/WAXS investigation
- Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
- Univ. West, Trollhattan (Sweden)
- Malmo Univ., Malmo (Sweden); Lund Univ., Lund (Sweden)
- Argonne National Lab. (ANL), Argonne, IL (United States)
Here, the aim of this work is to characterise precipitation kinetics in Haynes® 282® superalloy using high-energy Small Angle X-ray Scattering (SAXS) together with Wide Angle X-ray Scattering (WAXS). The phases identified by WAXS include: γ (matrix), γ' (hardening precipitates), MC (metallic carbides), and M23C6 /M6C (secondary metallic carbides). The γ'-precipitates are spheroids with a diameter of several nanometres, depending on temperature and aging time. From the SAXS data quantitative parameters such as volume fraction, number density and inter-particle distance were determined and correlated with Vickers microhardness measurements performed ex situ. The strengthening components associated with precipitates and solid solutions were separated using the measured Vickers microhardness and SAXS model parameters. A power law dependence between strengthening attributable to the precipitates and the product of volume fraction and mean precipitate radius was found. The solid solution strengthening component was found to be correlated with the repulsion/diffusion zone width around the precipitates.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- Swedish Foundation for Strategic Research (SSF); USDOE
- Grant/Contract Number:
- AC02-06CH11357; DEAC02-06CH11357
- OSTI ID:
- 1461548
- Alternate ID(s):
- OSTI ID: 1549031
- Journal Information:
- Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing, Vol. 711, Issue C; ISSN 0921-5093
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Review of the Quench Sensitivity of Aluminium Alloys: Analysis of the Kinetics and Nature of Quench-Induced Precipitation
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journal | December 2019 |
Investigation of the Effect of Short Exposure in the Temperature Range of 750–950 °C on the Ductility of Haynes® 282® by Advanced Microstructural Characterization
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journal | December 2019 |
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