Wang, X.-Y.; Wen, Z.-X.; Cheng, H.; Gu, S.-N.; Lu, G.-X. Influences of the Heating and Cooling Rates on the Dissolution and Precipitation Behavior of a Nickel-Based Single-Crystal Superalloy. Metals2019, 9, 360.
Wang, X.-Y.; Wen, Z.-X.; Cheng, H.; Gu, S.-N.; Lu, G.-X. Influences of the Heating and Cooling Rates on the Dissolution and Precipitation Behavior of a Nickel-Based Single-Crystal Superalloy. Metals 2019, 9, 360.
Wang, X.-Y.; Wen, Z.-X.; Cheng, H.; Gu, S.-N.; Lu, G.-X. Influences of the Heating and Cooling Rates on the Dissolution and Precipitation Behavior of a Nickel-Based Single-Crystal Superalloy. Metals2019, 9, 360.
Wang, X.-Y.; Wen, Z.-X.; Cheng, H.; Gu, S.-N.; Lu, G.-X. Influences of the Heating and Cooling Rates on the Dissolution and Precipitation Behavior of a Nickel-Based Single-Crystal Superalloy. Metals 2019, 9, 360.
Abstract
The effects of heating rate before solution treatment and cooling rate after solution treatment on the morphological distribution and evolution of precipitation phase of nickel-based single crystal superalloy were studied. The dissolution, precipitation and growth of precipitation phase and matrix phase during heat treatment were analyzed by means of high power scanning electron microscopy. The results show that the morphology of precipitated phase has nothing to do with the distribution of precipitated phase and the heating rate in the heating process, but the cooling rate in the cooling process affects the shape, size and distribution of precipitated phase. The faster the cooling rate, the smaller the precipitated phase is, the more irregular the shape is, the smaller the equivalent edge length is, and the smaller the channel width of matrix phase is.
Keywords
Nickel-based single crystal alloy; Heat treatment; Heating and cooling rate; Precipitation and dissolution of γ´ phase
Subject
Chemistry and Materials Science, Materials Science and Technology
Copyright:
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