Anomalous capillary flow of molten Al[sbnd]Si alloy and macrosegregation

Yangyang Wu; Konstantinos Lazaridis; Santhosh K. Muniyal Krishna; Cheng Nien Yu; Mikhail D. Krivilyov; Sinisa Dj Mesarovic; Dusan P. Sekulic

doi:10.1016/j.jmapro.2023.06.006

Anomalous capillary flow of molten Al[sbnd]Si alloy and macrosegregation

Yangyang Wu, Konstantinos Lazaridis, Santhosh K. Muniyal Krishna, Cheng Nien Yu, Mikhail D. Krivilyov, Sinisa Dj Mesarovic, Dusan P. Sekulic

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

A comprehensive study of molten alloy capillary flow in the wetting/non-wetting wedge-tee configuration is presented. The horizontal Al₂O₃ substrate is non-wetting, while the vertical, Al[sbnd]Mn alloy AA3003, is wetting. The braze alloy is a composite of an aluminum‑silicon alloy (Al[sbnd]10Si) with potassium fluoro-aluminate flux embedded. The purpose for selecting such a wetting/non-wetting configuration is for repair and construction in space by means of brazing. When capillary forces are not opposed by gravity, the spreading of a liquid braze may be controlled by a non-wetting surface. Specifically, we study: (i) the evolution of the free surface shape of a large melt mass in the gravity field, (ii) kinetics of advancing/receding triple lines and dynamic contact angles, and (iii) microstructure of the resolidified molten alloy on the substrates. The receding contact line exhibits a sudden withdrawal towards the corner, then a long-time stagnation before final equilibrium in the corner. In contrast to the typical monotonic evolution of the advancing contact angle, the receding contact angle features an anomalous non-monotonic behavior. The microstructure of the re-solidified sample features a phase macrosegregation.

Original language	English
Pages (from-to)	208-218
Number of pages	11
Journal	Journal of Manufacturing Processes
Volume	101
DOIs	https://doi.org/10.1016/j.jmapro.2023.06.006
State	Published - Sep 8 2023

Bibliographical note

Publisher Copyright:
© 2023 The Society of Manufacturing Engineers

Funding

This work is funded by NASA's Physical Sciences Research Program (Grant# NNX17AB52G) and Roscosmos Research ISS Program (Joint Space Experiment REAL). The authors acknowledge the guidance and valuable discussions offered by Ian M. Hanson (NASA MSFC) and Richard N. Grugel (NASA MSFC) during the course of the project work. TRILLIUM® material is provided by Gränges AB (Finspång, Sweden). TRILLIUM® technology is protected by US Patent No. 8871356. This work is funded by NASA's Physical Sciences Research Program (Grant# NNX17AB52G ) and Roscosmos Research ISS Program (Joint Space Experiment REAL). The authors acknowledge the guidance and valuable discussions offered by Ian M. Hanson (NASA MSFC) and Richard N. Grugel (NASA MSFC) during the course of the project work. TRILLIUM® material is provided by Gränges AB (Finspång, Sweden). TRILLIUM® technology is protected by US Patent No. 8871356.

Funders	Funder number
NASA MSFC	8871356
NASA's Physical Sciences Research Program	NNX17AB52G

Keywords

Aluminum alloy melt
Dynamic contact angle
Non-wetting, triple line motion
Wetting

ASJC Scopus subject areas

Strategy and Management
Management Science and Operations Research
Industrial and Manufacturing Engineering

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10.1016/j.jmapro.2023.06.006

Cite this

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title = "Anomalous capillary flow of molten Al[sbnd]Si alloy and macrosegregation",

abstract = "A comprehensive study of molten alloy capillary flow in the wetting/non-wetting wedge-tee configuration is presented. The horizontal Al2O3 substrate is non-wetting, while the vertical, Al[sbnd]Mn alloy AA3003, is wetting. The braze alloy is a composite of an aluminum‑silicon alloy (Al[sbnd]10Si) with potassium fluoro-aluminate flux embedded. The purpose for selecting such a wetting/non-wetting configuration is for repair and construction in space by means of brazing. When capillary forces are not opposed by gravity, the spreading of a liquid braze may be controlled by a non-wetting surface. Specifically, we study: (i) the evolution of the free surface shape of a large melt mass in the gravity field, (ii) kinetics of advancing/receding triple lines and dynamic contact angles, and (iii) microstructure of the resolidified molten alloy on the substrates. The receding contact line exhibits a sudden withdrawal towards the corner, then a long-time stagnation before final equilibrium in the corner. In contrast to the typical monotonic evolution of the advancing contact angle, the receding contact angle features an anomalous non-monotonic behavior. The microstructure of the re-solidified sample features a phase macrosegregation.",

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AU - Krivilyov, Mikhail D.

AU - Mesarovic, Sinisa Dj

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AB - A comprehensive study of molten alloy capillary flow in the wetting/non-wetting wedge-tee configuration is presented. The horizontal Al2O3 substrate is non-wetting, while the vertical, Al[sbnd]Mn alloy AA3003, is wetting. The braze alloy is a composite of an aluminum‑silicon alloy (Al[sbnd]10Si) with potassium fluoro-aluminate flux embedded. The purpose for selecting such a wetting/non-wetting configuration is for repair and construction in space by means of brazing. When capillary forces are not opposed by gravity, the spreading of a liquid braze may be controlled by a non-wetting surface. Specifically, we study: (i) the evolution of the free surface shape of a large melt mass in the gravity field, (ii) kinetics of advancing/receding triple lines and dynamic contact angles, and (iii) microstructure of the resolidified molten alloy on the substrates. The receding contact line exhibits a sudden withdrawal towards the corner, then a long-time stagnation before final equilibrium in the corner. In contrast to the typical monotonic evolution of the advancing contact angle, the receding contact angle features an anomalous non-monotonic behavior. The microstructure of the re-solidified sample features a phase macrosegregation.

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Anomalous capillary flow of molten Al[sbnd]Si alloy and macrosegregation

Abstract

Bibliographical note

Funding

Keywords

ASJC Scopus subject areas

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