Kinetics of κ Discontinuous Precipitation in Co-10Al-3Cu-1C (At. Pct)

Electron microscopy revealed continuous and discontinuous precipitation of κ -Co 3 AlC 0.5 in a Co-10Al-3Cu-1C (at. pct) alloy during aging at 500 °C, 850 °C, and 900 °C. The kinetics of the discontinuous reaction at 500 °C are sluggish. Increasing the temperature increases the kinetics significantl...

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Bibliographic Details
Published in:Metallurgical and materials transactions. A, Physical metallurgy and materials science Physical metallurgy and materials science, 2021-12, Vol.52 (12), p.5159-5164
Main Authors: Kamali, H., Kaufman, M. J., Field, R. D., Nedjad, S. Hossein, Clarke, A. J.
Format: Article
Language:English
Subjects:
Aging
Aging (metallurgy)
Alloys
Brief Communication
Characterization and Evaluation of Materials
Chemistry and Materials Science
Engineering
Grain boundaries
Homogenization
Kinetics
Materials Science
Metallic Materials
Nanotechnology
Scanning electron microscopy
Structural Materials
Surfaces and Interfaces
Temperature
Thin Films
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Summary:Electron microscopy revealed continuous and discontinuous precipitation of κ -Co 3 AlC 0.5 in a Co-10Al-3Cu-1C (at. pct) alloy during aging at 500 °C, 850 °C, and 900 °C. The kinetics of the discontinuous reaction at 500 °C are sluggish. Increasing the temperature increases the kinetics significantly, due to the exponential increase in the Al grain boundary diffusivity. However, the kinetics at 900 °C are slower than those at 850 °C, due to a significant decrease in the driving force.
ISSN:1073-5623
1543-1940
DOI:10.1007/s11661-021-06483-3