Precipitation Kinetics and Behavior of δ Phase in Inconel 718 Alloy

Hai Yan Zhang; Shi Hong Zhang; Ming Cheng

doi:10.4028/www.scientific.net/AMR.652-654.1128

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 652-654Precipitation Kinetics and Behavior of δ Phase in...

Precipitation Kinetics and Behavior of δ Phase in Inconel 718 Alloy

Abstract:

The precipitation kinetic and behavior of δ phase in Inconel 718 alloy at 900, 930 and 960°C have been studied using the quantitative X-ray diffraction (XRD) method. The results indicated that the nucleation site and way of δ phase depended on temperature by the observation of microstructures. During the aging process, the δ phase nucleated on the grain boundaries and twin boundaries preferentially, while the δ phase precipitated directly from the interior of grain when the temperature was above 900°C. At a certain aging temperature, the relationship between the δ phase content and the aging time fitted an Avrami-type equation.

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Advanced Materials Research (Volumes 652-654)

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1128-1131

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.652-654.1128

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Online since:

January 2013

Authors:

Hai Yan Zhang, Shi Hong Zhang, Ming Cheng

Keywords:

Inconel 718, Precipitation Kinetics, δ Phase

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