Abstract
The solidification microstructures of undercooled Ni90Cu10 alloys under different undercoolings were studied systematically by means of melt coating and cyclic superheating. In the obtained undercooling range, the solidification structures of the two undercooled alloys have similar transformation processes, and there are two kinds of grain refinement structures under the conditions of low undercooling and high undercooling, respectively. The microstructures of the two grain refinement processes were analyzed in more detail by electronic backscattering diffraction technique. Under the condition of small undercooling, dendrite remelting is considered to be the main reason of grain refinement. However, under the condition of high undercooling, the existence of annealing twins and obvious migration of grain boundary are important evidences for the occurrence of recrystallization process.
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References
Fan Z, Gao F, Wang Y, Men H, Zhou L. Effect of Solutes on Grain Refinement[M]. Progress in Materials Science, 2021
Jiang A, Wang X. Dendritic and Seaweed Growth of Proeutectic Scandium Tri-aluminide in Hypereutectic Al-Sc Undercooled Melt[J]. Acta Materialia, 2020, 200: 56–65
Grgac P, Mesárošová J, Behúlová M, Martinkovič M. Experimental Determination of the Nuclei Number in the Deeply Undercooled and rapidly Solidified Powder Particles of High-alloyed Steel[J]. Journal of Alloys and Compounds, 2019, 798: 204–209
Li J, Jie W, Yang G. Solidification Structure Formation in Undercooled Fe-Ni Alloy[J]. Acta Materialia, 2002, 50(7): 1 797–1 807
Liu X, Yang G, Ping F. Solidification Behavior of Decagonal Quasicrystal in the Undercooled Al 72 Ni 12 Co 16 Alloy Melt[J]. Journal of Materials Science, 2003, 38(5): 885–889
Shang Z, Wei X, Song D, Zou J, Liang S, Liu G, et al. Microstructure and Mechanical Properties of a New Nickel-based Single Crystal Superalloy[J]. Journal of Materials Research and Technology, 2020, 9(5): 11 641–11 649
Xu XL, Chen YZ, Liu F. Evolution of Solidification Microstructure in Undercooled Co80Pd20 Alloys[J]. Materials Science and Technology, 2013, 28(12): 1 492–1 498
Xu XL, Liu F. Crystal Growth Due to Recrystallization upon Annealing Rapid Solidification Microstructures of Deeply Undercooled Single Phase Alloys Quenched before Recalescence[J]. Crystal Growth and Design, 2014, 14(5): 2 110–2 114
Xu XL, Zhao YH, Hou H. Observation of Dendrite Growth Velocity and Microstructure Transition in Highly Undercooled Single Phase Alloys[J]. Materials Characterization, 2019, 155
Zhang D, Prasad A, Bermingham MJ, Todaro CJ, Benoit MJ, Patel MN, et al. Grain Refinement of Alloys in Fusion-Based Additive Manufacturing Processes[J]. Metallurgical and Materials Transactions A, 2020, 51(9): 4341–4359
Li J, Liu Y, Lu Y, Yang G, Zhou Y. Structural Evolution of Undercooled Ni-Cu Alloys[J]. Journal of Crystal Growth, 1998, 192: 462–470
Wang H, Liu F, Yang G. Experimental Study of Grain Refinement Mechanism in Undercooled Ni-15at%Cu Alloy[J]. Journal of Materials Research, 2011, 25(10): 1 963–1 974
Willnecker R, Herlach DM, Feuerbacher B. Grain Refinement Induced by a Critical Crystal Growth Velocity in Undercooled Melts[J]. Applied Physics Letters, 1990, 56(4): 324–326
Mullis AM, Cochrane RF. Grain Refinement and the Stability of Dendrites Growing into Undercooled Pure Metals and Alloys[J]. Journal of Applied Physics. 1997, 82(8): 3 783–3 790
Jones B, Weston G. Grain Refinement in Undercooled Copper[J]. J. Aust. Inst. Met., 1970, 15: 3 167
Karma A. Model of Grain Refinement in Solidification of Undercooled Melts[J]. International Journal of Non-Equiulibrium Processing, 1998, 11(2): 201–223
Liu F, Yang G. Stress-induced Recrystallization Mechanism for Grain Refinement in Highly Undercooled Superalloy[J]. Journal of Crystal Growth, 2001, 231: 295–305
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Funded by the Basic Applied Research Projects in Shanxi Province(No. 201801D221151), and the Key R & D and Promotion Projects in Henan Province(No. 212102210267)
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Li, H., Siambun, N.J., Chuab, BL. et al. Microstructure Transition and Grain Refinement Mechanism of Undercooled Alloys. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 36, 922–926 (2021). https://doi.org/10.1007/s11595-021-2488-5
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DOI: https://doi.org/10.1007/s11595-021-2488-5