Characterization of the Microstructure Evolution of Ni-Based Superalloy at Liquidus Temperature by Electromagnetic Field

The effect of isothermal treatment temperatures and isothermal treatment time on the microstructure was studied. The results showed that the globular and equiaxed grains with the average grain size of 60 μm and the shape factor of circle of 0.95 can be obtained when the melt of Ni-Cr-W supera...

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Main Authors:	Zhongtang Gao, Jinqiang Tan, Wei Guo, Chuanwei Zhang, Wu Zhang
Format:	Article
Language:	English
Published:	MDPI AG 2018-09-01
Series:	Metals
Subjects:	melt treatment solidification electromagnetic field Ni-Cr-W superalloy microstructure
Online Access:	http://www.mdpi.com/2075-4701/8/10/748

id	doaj-fb6dbe0459624ccbb04a1c5c6ca1683b
record_format	Article
spelling	doaj-fb6dbe0459624ccbb04a1c5c6ca1683b2020-11-25T00:16:18ZengMDPI AGMetals2075-47012018-09-0181074810.3390/met8100748met8100748Characterization of the Microstructure Evolution of Ni-Based Superalloy at Liquidus Temperature by Electromagnetic FieldZhongtang Gao0Jinqiang Tan1Wei Guo2Chuanwei Zhang3Wu Zhang4School of Mechanical Engineering, Xi’an University of Science and Technology, Xi’an 710054, ChinaState Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710054, ChinaSchool of Mechanical Engineering, Xi’an University of Science and Technology, Xi’an 710054, ChinaSchool of Mechanical Engineering, Xi’an University of Science and Technology, Xi’an 710054, ChinaSchool of Mechanical Engineering, Xi’an University of Science and Technology, Xi’an 710054, ChinaThe effect of isothermal treatment temperatures and isothermal treatment time on the microstructure was studied. The results showed that the globular and equiaxed grains with the average grain size of 60 μm and the shape factor of circle of 0.95 can be obtained when the melt of Ni-Cr-W superalloy was subjected to the heat treatment of 10 min at 1400 °C. The quenching results showed the volume fraction of the eutectic phase was the largest and the volume fraction of primary γ phase was the smallest after the isothermal treatment of 1400 °C. The optimal melt treatment temperature and time were 1400 °C and 10 min, respectively. Moreover, the effect of electromagnetic field on the solidification was also investigated. It was demonstrated that applying electromagnetic field was beneficial to the uniform temperature, solute field and the high density of the secondary nuclei, which contributed to grain refinement.http://www.mdpi.com/2075-4701/8/10/748melt treatmentsolidificationelectromagnetic fieldNi-Cr-W superalloymicrostructure
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Zhongtang Gao Jinqiang Tan Wei Guo Chuanwei Zhang Wu Zhang
spellingShingle	Zhongtang Gao Jinqiang Tan Wei Guo Chuanwei Zhang Wu Zhang Characterization of the Microstructure Evolution of Ni-Based Superalloy at Liquidus Temperature by Electromagnetic Field Metals melt treatment solidification electromagnetic field Ni-Cr-W superalloy microstructure
author_facet	Zhongtang Gao Jinqiang Tan Wei Guo Chuanwei Zhang Wu Zhang
author_sort	Zhongtang Gao
title	Characterization of the Microstructure Evolution of Ni-Based Superalloy at Liquidus Temperature by Electromagnetic Field
title_short	Characterization of the Microstructure Evolution of Ni-Based Superalloy at Liquidus Temperature by Electromagnetic Field
title_full	Characterization of the Microstructure Evolution of Ni-Based Superalloy at Liquidus Temperature by Electromagnetic Field
title_fullStr	Characterization of the Microstructure Evolution of Ni-Based Superalloy at Liquidus Temperature by Electromagnetic Field
title_full_unstemmed	Characterization of the Microstructure Evolution of Ni-Based Superalloy at Liquidus Temperature by Electromagnetic Field
title_sort	characterization of the microstructure evolution of ni-based superalloy at liquidus temperature by electromagnetic field
publisher	MDPI AG
series	Metals
issn	2075-4701
publishDate	2018-09-01
description	The effect of isothermal treatment temperatures and isothermal treatment time on the microstructure was studied. The results showed that the globular and equiaxed grains with the average grain size of 60 μm and the shape factor of circle of 0.95 can be obtained when the melt of Ni-Cr-W superalloy was subjected to the heat treatment of 10 min at 1400 °C. The quenching results showed the volume fraction of the eutectic phase was the largest and the volume fraction of primary γ phase was the smallest after the isothermal treatment of 1400 °C. The optimal melt treatment temperature and time were 1400 °C and 10 min, respectively. Moreover, the effect of electromagnetic field on the solidification was also investigated. It was demonstrated that applying electromagnetic field was beneficial to the uniform temperature, solute field and the high density of the secondary nuclei, which contributed to grain refinement.
topic	melt treatment solidification electromagnetic field Ni-Cr-W superalloy microstructure
url	http://www.mdpi.com/2075-4701/8/10/748
work_keys_str_mv	AT zhongtanggao characterizationofthemicrostructureevolutionofnibasedsuperalloyatliquidustemperaturebyelectromagneticfield AT jinqiangtan characterizationofthemicrostructureevolutionofnibasedsuperalloyatliquidustemperaturebyelectromagneticfield AT weiguo characterizationofthemicrostructureevolutionofnibasedsuperalloyatliquidustemperaturebyelectromagneticfield AT chuanweizhang characterizationofthemicrostructureevolutionofnibasedsuperalloyatliquidustemperaturebyelectromagneticfield AT wuzhang characterizationofthemicrostructureevolutionofnibasedsuperalloyatliquidustemperaturebyelectromagneticfield
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Characterization of the Microstructure Evolution of Ni-Based Superalloy at Liquidus Temperature by Electromagnetic Field

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