Matrix-Diffusion-Controlled Coarsening of the γ′ Phase in Waspaloy

Haiping Wang; Dong Liu; Yongzhao Shi; Jianguo Wang; Yanhui Yang; Longxiang Wang; Weidong Qin

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자료유형: 학술저널

저자정보: Haiping Wang (Northwestern Polytechnical University) Dong Liu (Northwestern Polytechnical University) Yongzhao Shi (Northwestern Polytechnical University) Jianguo Wang (Northwestern Polytechnical University) Yanhui Yang (Northwestern Polytechnical University) Longxiang Wang (AVIC Guizhou Anda Aviation Forging Company Ltd) Weidong Qin (AVIC Shaanxi Hong Yuan Aviation Forging Company Ltd)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.25 No.6

발행연도: 2019.1

수록면: 1,410 - 1,419 (10page)

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This paper discussed the coarsening behavior of the γ′ phase in Waspaloy during heat treatment at different aging timesunder the temperatures of 960 °C and 1000 °C. The morphology of γ′ phase is obtained by scanning electron microscopyand it is measured by the software Image Pro Plus 6.0 in a variety of aging conditions. The volume fraction of the γ′ phase isdecreasing with the increase of the temperature. The radius of the γ′ phase is subject to involve the coarsening process duringaging treatment, and the coarsening rate decreases with the extension of the aging time at certain temperature. Besides,the coarsening kinetics of γ′ phase in Waspaloy is adequately characterized by the Lifshitz–Slyozov–Wagner (LSW) theorymodel as the particle size distribution and coarsening behavior show excellent agreement with the LSW model. Accordingto the experimental results and LSW model, the coarsening rate coefficients were determined to be 27.23 nm3/s and58.67 nm3/s under the aging temperature of 960 °C and 1000 °C respectively. Meanwhile, on the basis of the experimentalstatistics analysis and the LSW model, the mathematical model of the coarsening behavior of the γ′ phase in Waspaloy wasdeveloped. Mathematical model developed in this paper can be used to evaluate the coarsening process of the γ′ phase duringthermal exposure. The interfacial energy between the γ′ phase and the γ matrix was determined to be 56.04 mJ/m2 and44.27 mJ/m2 at the temperature of 960 °C and 1000 °C respectively.

#Waspaloy · Coarsening behavior · γ′ phase · LSW model · Interfacial energy

참고문헌 (45)

참고문헌 신청

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