Simulation and experimental characterization of microporosity during solidification in Sn-Bi alloys

The formation of microporosity during solidification of Sn-Bi alloys is investigated through experiments and simulations. Samples of varying composition with 20, 30, 47 and 58 wt% Bi are solidified in a copper mould and the pore fraction is measured through scanning electron microscopy. Finite eleme...

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Autores principales:	Georg Siroky, Elke Kraker, Dietmar Kieslinger, Ernst Kozeschnik, Werner Ecker
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Solder Computed tomography Morphology Porosity RVE FEM Materials of engineering and construction. Mechanics of materials TA401-492
Acceso en línea:	https://doaj.org/article/365fafce1995480c837651cde40a13c2
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spelling	oai:doaj.org-article:365fafce1995480c837651cde40a13c22021-11-24T04:26:48ZSimulation and experimental characterization of microporosity during solidification in Sn-Bi alloys0264-127510.1016/j.matdes.2021.110258https://doaj.org/article/365fafce1995480c837651cde40a13c22021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S0264127521008133https://doaj.org/toc/0264-1275The formation of microporosity during solidification of Sn-Bi alloys is investigated through experiments and simulations. Samples of varying composition with 20, 30, 47 and 58 wt% Bi are solidified in a copper mould and the pore fraction is measured through scanning electron microscopy. Finite element models are derived from X-ray micro computed tomography data and a material model is implemented to capture the effect of liquid pressure and volumetric swelling. The experimental assessment of solidification porosity shows a strong dependency on alloy composition. The round morphology of porosity found in the Sn-20 wt% Bi alloy indicates its formation in the terminal stage of solidification. Microporosity formation is computed by means of Finite Element simulations and the results correlate with experimental findings. The analysis confirms volumetric shrinkage in the liquid state of confined eutectic domains as the mechanism for pore formation and determines the composition dependency of Sn-Bi alloys.Georg SirokyElke KrakerDietmar KieslingerErnst KozeschnikWerner EckerElsevierarticleSolderComputed tomographyMorphologyPorosityRVEFEMMaterials of engineering and construction. Mechanics of materialsTA401-492ENMaterials & Design, Vol 212, Iss , Pp 110258- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Solder Computed tomography Morphology Porosity RVE FEM Materials of engineering and construction. Mechanics of materials TA401-492
spellingShingle	Solder Computed tomography Morphology Porosity RVE FEM Materials of engineering and construction. Mechanics of materials TA401-492 Georg Siroky Elke Kraker Dietmar Kieslinger Ernst Kozeschnik Werner Ecker Simulation and experimental characterization of microporosity during solidification in Sn-Bi alloys
description	The formation of microporosity during solidification of Sn-Bi alloys is investigated through experiments and simulations. Samples of varying composition with 20, 30, 47 and 58 wt% Bi are solidified in a copper mould and the pore fraction is measured through scanning electron microscopy. Finite element models are derived from X-ray micro computed tomography data and a material model is implemented to capture the effect of liquid pressure and volumetric swelling. The experimental assessment of solidification porosity shows a strong dependency on alloy composition. The round morphology of porosity found in the Sn-20 wt% Bi alloy indicates its formation in the terminal stage of solidification. Microporosity formation is computed by means of Finite Element simulations and the results correlate with experimental findings. The analysis confirms volumetric shrinkage in the liquid state of confined eutectic domains as the mechanism for pore formation and determines the composition dependency of Sn-Bi alloys.
format	article
author	Georg Siroky Elke Kraker Dietmar Kieslinger Ernst Kozeschnik Werner Ecker
author_facet	Georg Siroky Elke Kraker Dietmar Kieslinger Ernst Kozeschnik Werner Ecker
author_sort	Georg Siroky
title	Simulation and experimental characterization of microporosity during solidification in Sn-Bi alloys
title_short	Simulation and experimental characterization of microporosity during solidification in Sn-Bi alloys
title_full	Simulation and experimental characterization of microporosity during solidification in Sn-Bi alloys
title_fullStr	Simulation and experimental characterization of microporosity during solidification in Sn-Bi alloys
title_full_unstemmed	Simulation and experimental characterization of microporosity during solidification in Sn-Bi alloys
title_sort	simulation and experimental characterization of microporosity during solidification in sn-bi alloys
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/365fafce1995480c837651cde40a13c2
work_keys_str_mv	AT georgsiroky simulationandexperimentalcharacterizationofmicroporosityduringsolidificationinsnbialloys AT elkekraker simulationandexperimentalcharacterizationofmicroporosityduringsolidificationinsnbialloys AT dietmarkieslinger simulationandexperimentalcharacterizationofmicroporosityduringsolidificationinsnbialloys AT ernstkozeschnik simulationandexperimentalcharacterizationofmicroporosityduringsolidificationinsnbialloys AT wernerecker simulationandexperimentalcharacterizationofmicroporosityduringsolidificationinsnbialloys
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Simulation and experimental characterization of microporosity during solidification in Sn-Bi alloys

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