Product engineering and sustainability

Janssen, Ljj Jos; Janssen, Camiel H. C.

doi:10.1088/1757-899x/162/1/012001

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Effect Of Cooling Rate On Nucleation Of Primary γ′1

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2020

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“…(8). When the temperature continues to decrease, diffusion coefficient of atoms becomes smaller [49,50]. According to Eq.…”

Section: Effect Of Cooling Rate On Nucleation Of Primary γ′mentioning

confidence: 99%

Microstructure Evolution of Primary γ′ Phase in Ni3Al-Based Superalloy

Zhang

Peng

et al. 2020

Acta Metall. Sin. (Engl. Lett.)

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In this work, water cooling, air cooling (AC) and furnace cooling (FC) were applied to investigate the effect of cooling rate on microstructure evolution of primary γ′ in a newly designed Ni 3 Al-based alloy. The results showed that nucleation rate of primary γ′ increased with increasing cooling rate. In addition, higher cooling rate shortened growth period of primary γ′, which made its morphology close to the initial precipitated γ′. For AC and FC specimens, due to the lower cooling rate, primary γ′ possessed longer growth period and its morphology was mainly due to the evolution of lattice misfit between γ and primary γ′. Meanwhile, growth of primary γ′ depended on lattice misfit distribution between its corner and edge area. Moreover, primary γ′ morphologies of sphere, cube and concave cube with tip corners were illustrated by considering interaction between elemental diffusion and elastic strain energy.

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“…(8). When the temperature continues to decrease, diffusion coefficient of atoms becomes smaller [49,50]. According to Eq.…”

Section: Effect Of Cooling Rate On Nucleation Of Primary γ′mentioning

confidence: 99%