Microstructure transition and grain refinement mechanism of undercooled alloys

Hongtao Li and Nancy Julius Siambun and Chua, Bih Lii and Gan, Melvin Jet Hong and Hongen An (2021) Microstructure transition and grain refinement mechanism of undercooled alloys. Journal Wuhan University of Technology, Materials Science Edition, 36. pp. 922-926. ISSN 1000-2413

Text Microstructure transition and grain refinement mechanism of undercooled alloys _ABSTRACT.pdf Download (57kB)

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.

Item Type:	Article
Keyword:	Microstructure transition , Grain refinement , Undercooled alloys , Ni-Cu alloys
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA1-2040 Engineering (General). Civil engineering (General) > TA401-492 Materials of engineering and construction. Mechanics of materials
Department:	FACULTY > Faculty of Engineering
Depositing User:	SAFRUDIN BIN DARUN -
Date Deposited:	19 May 2022 09:11
Last Modified:	19 May 2022 09:11
URI:	https://eprints.ums.edu.my/id/eprint/32618

Actions (login required)

View Item