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Microstructural Feature and Evolution of Rapidly Solidified Ni3Al-Based Superalloys

Journal Article


Abstract


  • The Ni3Al-based superalloy was rapidly solidified in the form of droplets with varying diameters. The cooling rate (Rc) is a function of diameter (D) of droplet. With the decrease in droplet sizes (increase in the cooling rates), the volume fraction of γ′ + γ eutectic structure increases from 21.31 (D = 1400 μm, Rc = 3.6 × 102 K s−1) to 36.31% (D = 270 μm, Rc = 2.3 × 103 K s−1). Moreover, unimodal size distribution of nano-γ′ exists in the droplets instead of bimodal dual-size distributions of γ′ precipitates that are normal in as-cast alloys.

Publication Date


  • 2019

Citation


  • Li, Y. F., Li, C., Wu, J., Li, H. J., Liu, Y. C., & Wang, H. P. (2019). Microstructural Feature and Evolution of Rapidly Solidified Ni3Al-Based Superalloys. Acta Metallurgica Sinica (English Letters), 32(6), 764-770. doi:10.1007/s40195-018-0839-9

Scopus Eid


  • 2-s2.0-85065322838

Web Of Science Accession Number


Start Page


  • 764

End Page


  • 770

Volume


  • 32

Issue


  • 6

Abstract


  • The Ni3Al-based superalloy was rapidly solidified in the form of droplets with varying diameters. The cooling rate (Rc) is a function of diameter (D) of droplet. With the decrease in droplet sizes (increase in the cooling rates), the volume fraction of γ′ + γ eutectic structure increases from 21.31 (D = 1400 μm, Rc = 3.6 × 102 K s−1) to 36.31% (D = 270 μm, Rc = 2.3 × 103 K s−1). Moreover, unimodal size distribution of nano-γ′ exists in the droplets instead of bimodal dual-size distributions of γ′ precipitates that are normal in as-cast alloys.

Publication Date


  • 2019

Citation


  • Li, Y. F., Li, C., Wu, J., Li, H. J., Liu, Y. C., & Wang, H. P. (2019). Microstructural Feature and Evolution of Rapidly Solidified Ni3Al-Based Superalloys. Acta Metallurgica Sinica (English Letters), 32(6), 764-770. doi:10.1007/s40195-018-0839-9

Scopus Eid


  • 2-s2.0-85065322838

Web Of Science Accession Number


Start Page


  • 764

End Page


  • 770

Volume


  • 32

Issue


  • 6