Effect of melt superheat treatment on solidification behavior and microstructure of new Ni–Co based superalloy

A new type of Ni–Co based superalloy was prepared by vacuum induction melting (VIM), and the effects of superheat on element distribution, dendrite segregation, and solidification microstructure refinement of the new Ni–Co based superalloy are revealed. The effect of solidification structure treatme...

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Autores principales:	Hongyang Cui, Yi Tan, Rusheng Bai, Yi Li, Longhai Zhao, Xinpeng Zhuang, Yilin Wang, Ziang Chen, Pengting Li, Xiaogang You, Chuanyong Cui
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Superheat treatment Dendritic segregation Microstructure refinement New Ni–Co Based superalloy Mining engineering. Metallurgy TN1-997
Acceso en línea:	https://doaj.org/article/465578b9a27e481abb1b7439111273e9
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spelling	oai:doaj.org-article:465578b9a27e481abb1b7439111273e92021-11-10T04:27:49ZEffect of melt superheat treatment on solidification behavior and microstructure of new Ni–Co based superalloy2238-785410.1016/j.jmrt.2021.10.122https://doaj.org/article/465578b9a27e481abb1b7439111273e92021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2238785421012588https://doaj.org/toc/2238-7854A new type of Ni–Co based superalloy was prepared by vacuum induction melting (VIM), and the effects of superheat on element distribution, dendrite segregation, and solidification microstructure refinement of the new Ni–Co based superalloy are revealed. The effect of solidification structure treatment under different conditions was quantitatively studied by differential scanning calorimetry (DSC), scanning electron microscope (SEM), and electron probe micro analyzer (EPMA). The results indicated that the nucleation undercooling increased and the crystallization temperature interval decreased with the rise of the melt temperature; As the superheat temperature rised, the size of the phase was refined; the secondary dendrite arm spacing of the alloy decreased continuously; and the dendritic segregation of the alloy decreased. It was found that the critical temperature of melting energy for the new Ni–Co based superalloy clusters is about 1550 °C. The maximum positive segregation element of the new Ni–Co-based superalloy is Ti, and the maximum negative segregation element is W; When the temperature increased from 1450 °C to 1600 °C, the segregation coefficient of Ti increased from 0.54 to 0.63, and the segregation coefficient of W decreased from 1.9 to 1.5. When the superheat was increased, the atomic cluster size decreases, and the effect of refining the solidification structure of the new Ni–Co-based superalloy is more significant.Hongyang CuiYi TanRusheng BaiYi LiLonghai ZhaoXinpeng ZhuangYilin WangZiang ChenPengting LiXiaogang YouChuanyong CuiElsevierarticleSuperheat treatmentDendritic segregationMicrostructure refinementNew Ni–Co Based superalloyMining engineering. MetallurgyTN1-997ENJournal of Materials Research and Technology, Vol 15, Iss , Pp 4970-4980 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Superheat treatment Dendritic segregation Microstructure refinement New Ni–Co Based superalloy Mining engineering. Metallurgy TN1-997
spellingShingle	Superheat treatment Dendritic segregation Microstructure refinement New Ni–Co Based superalloy Mining engineering. Metallurgy TN1-997 Hongyang Cui Yi Tan Rusheng Bai Yi Li Longhai Zhao Xinpeng Zhuang Yilin Wang Ziang Chen Pengting Li Xiaogang You Chuanyong Cui Effect of melt superheat treatment on solidification behavior and microstructure of new Ni–Co based superalloy
description	A new type of Ni–Co based superalloy was prepared by vacuum induction melting (VIM), and the effects of superheat on element distribution, dendrite segregation, and solidification microstructure refinement of the new Ni–Co based superalloy are revealed. The effect of solidification structure treatment under different conditions was quantitatively studied by differential scanning calorimetry (DSC), scanning electron microscope (SEM), and electron probe micro analyzer (EPMA). The results indicated that the nucleation undercooling increased and the crystallization temperature interval decreased with the rise of the melt temperature; As the superheat temperature rised, the size of the phase was refined; the secondary dendrite arm spacing of the alloy decreased continuously; and the dendritic segregation of the alloy decreased. It was found that the critical temperature of melting energy for the new Ni–Co based superalloy clusters is about 1550 °C. The maximum positive segregation element of the new Ni–Co-based superalloy is Ti, and the maximum negative segregation element is W; When the temperature increased from 1450 °C to 1600 °C, the segregation coefficient of Ti increased from 0.54 to 0.63, and the segregation coefficient of W decreased from 1.9 to 1.5. When the superheat was increased, the atomic cluster size decreases, and the effect of refining the solidification structure of the new Ni–Co-based superalloy is more significant.
format	article
author	Hongyang Cui Yi Tan Rusheng Bai Yi Li Longhai Zhao Xinpeng Zhuang Yilin Wang Ziang Chen Pengting Li Xiaogang You Chuanyong Cui
author_facet	Hongyang Cui Yi Tan Rusheng Bai Yi Li Longhai Zhao Xinpeng Zhuang Yilin Wang Ziang Chen Pengting Li Xiaogang You Chuanyong Cui
author_sort	Hongyang Cui
title	Effect of melt superheat treatment on solidification behavior and microstructure of new Ni–Co based superalloy
title_short	Effect of melt superheat treatment on solidification behavior and microstructure of new Ni–Co based superalloy
title_full	Effect of melt superheat treatment on solidification behavior and microstructure of new Ni–Co based superalloy
title_fullStr	Effect of melt superheat treatment on solidification behavior and microstructure of new Ni–Co based superalloy
title_full_unstemmed	Effect of melt superheat treatment on solidification behavior and microstructure of new Ni–Co based superalloy
title_sort	effect of melt superheat treatment on solidification behavior and microstructure of new ni–co based superalloy
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/465578b9a27e481abb1b7439111273e9
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_version_	1718440643606347776

Effect of melt superheat treatment on solidification behavior and microstructure of new Ni–Co based superalloy

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