Centrifugal granulation behavior in metallic powder fabrication by plasma rotating electrode process

Abstract In recent years, spherical powders with no or minimal internal pores fabricated by the plasma rotating electrode process (PREP) have been highly recommended for powder-type additive manufacturing. Most research on PREP is aimed at establishing relationship between PREP parameters and powder...

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Autores principales:	Yufan Zhao, Yujie Cui, Haruko Numata, Huakang Bian, Kimio Wako, Kenta Yamanaka, Kenta Aoyagi, Akihiko Chiba
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/1e0f710121b24ae98078fbbbe9e2a0b1
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spelling	oai:doaj.org-article:1e0f710121b24ae98078fbbbe9e2a0b12021-12-02T15:10:11ZCentrifugal granulation behavior in metallic powder fabrication by plasma rotating electrode process10.1038/s41598-020-75503-w2045-2322https://doaj.org/article/1e0f710121b24ae98078fbbbe9e2a0b12020-10-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-75503-whttps://doaj.org/toc/2045-2322Abstract In recent years, spherical powders with no or minimal internal pores fabricated by the plasma rotating electrode process (PREP) have been highly recommended for powder-type additive manufacturing. Most research on PREP is aimed at establishing relationship between PREP parameters and powder size. However, almost no dedicated research on granulation behavior has been conducted so far. In the present study, PREP experiments of Ti64 and SUS316 alloys were carried out. Numerical modeling based on computational thermo-fluid dynamics was developed to analyze the granulation behavior. In particular, the roles of the additionally introduced gas blast and the morphology of the electrode end surface in fluid granulation were preliminarily investigated. The study showed that in addition to the electrode's rotating speed and diameter, manipulating the plasma arc current (i.e., the melting rate) could also be an effective way to control the PREP-powder size. According to the simulation, there were competing actions of the gas blast affecting the powder size. The gas blast created disturbance on the fluid and deepened the depression of the electrode end surface, which facilitated powder refinement. However, the cooling effect enhanced the fluid stability and hindered fluid granulation. The conclusions indicated the possibility of using various methods to manipulate PREP-powder size.Yufan ZhaoYujie CuiHaruko NumataHuakang BianKimio WakoKenta YamanakaKenta AoyagiAkihiko ChibaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-15 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yufan Zhao Yujie Cui Haruko Numata Huakang Bian Kimio Wako Kenta Yamanaka Kenta Aoyagi Akihiko Chiba Centrifugal granulation behavior in metallic powder fabrication by plasma rotating electrode process
description	Abstract In recent years, spherical powders with no or minimal internal pores fabricated by the plasma rotating electrode process (PREP) have been highly recommended for powder-type additive manufacturing. Most research on PREP is aimed at establishing relationship between PREP parameters and powder size. However, almost no dedicated research on granulation behavior has been conducted so far. In the present study, PREP experiments of Ti64 and SUS316 alloys were carried out. Numerical modeling based on computational thermo-fluid dynamics was developed to analyze the granulation behavior. In particular, the roles of the additionally introduced gas blast and the morphology of the electrode end surface in fluid granulation were preliminarily investigated. The study showed that in addition to the electrode's rotating speed and diameter, manipulating the plasma arc current (i.e., the melting rate) could also be an effective way to control the PREP-powder size. According to the simulation, there were competing actions of the gas blast affecting the powder size. The gas blast created disturbance on the fluid and deepened the depression of the electrode end surface, which facilitated powder refinement. However, the cooling effect enhanced the fluid stability and hindered fluid granulation. The conclusions indicated the possibility of using various methods to manipulate PREP-powder size.
format	article
author	Yufan Zhao Yujie Cui Haruko Numata Huakang Bian Kimio Wako Kenta Yamanaka Kenta Aoyagi Akihiko Chiba
author_facet	Yufan Zhao Yujie Cui Haruko Numata Huakang Bian Kimio Wako Kenta Yamanaka Kenta Aoyagi Akihiko Chiba
author_sort	Yufan Zhao
title	Centrifugal granulation behavior in metallic powder fabrication by plasma rotating electrode process
title_short	Centrifugal granulation behavior in metallic powder fabrication by plasma rotating electrode process
title_full	Centrifugal granulation behavior in metallic powder fabrication by plasma rotating electrode process
title_fullStr	Centrifugal granulation behavior in metallic powder fabrication by plasma rotating electrode process
title_full_unstemmed	Centrifugal granulation behavior in metallic powder fabrication by plasma rotating electrode process
title_sort	centrifugal granulation behavior in metallic powder fabrication by plasma rotating electrode process
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/1e0f710121b24ae98078fbbbe9e2a0b1
work_keys_str_mv	AT yufanzhao centrifugalgranulationbehaviorinmetallicpowderfabricationbyplasmarotatingelectrodeprocess AT yujiecui centrifugalgranulationbehaviorinmetallicpowderfabricationbyplasmarotatingelectrodeprocess AT harukonumata centrifugalgranulationbehaviorinmetallicpowderfabricationbyplasmarotatingelectrodeprocess AT huakangbian centrifugalgranulationbehaviorinmetallicpowderfabricationbyplasmarotatingelectrodeprocess AT kimiowako centrifugalgranulationbehaviorinmetallicpowderfabricationbyplasmarotatingelectrodeprocess AT kentayamanaka centrifugalgranulationbehaviorinmetallicpowderfabricationbyplasmarotatingelectrodeprocess AT kentaaoyagi centrifugalgranulationbehaviorinmetallicpowderfabricationbyplasmarotatingelectrodeprocess AT akihikochiba centrifugalgranulationbehaviorinmetallicpowderfabricationbyplasmarotatingelectrodeprocess
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Centrifugal granulation behavior in metallic powder fabrication by plasma rotating electrode process

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