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Lateral heat flux and remelting during growth into the mushy-zone.

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Title: Lateral heat flux and remelting during growth into the mushy-zone.
Authors: Rodriguez, Justin E.1 Rodrigu.Ju@gmail.com, Matson, Douglas M.1
Source: Acta Materialia. May2017, Vol. 129, p408-414. 7p.
Subjects: Heat flux, Containerless processing, Rapid solidification processing of metals, Iron alloys, Metastable states, Hypoeutectic alloys
Abstract: In the context of dendritic rapid solidification, the goal of this work was to develop a model that describes growth of the stable phase in the presence of a preexisting metastable phase without requiring in-depth knowledge of the local geometry of the growing dendrite or the growth environment. Results facilitate predictive computational materials modeling of the transformation sequence, solidification path and microstructural evolution during industrial casting operations. The model was evaluated using mushy-zone growth velocity data from Fe–Co and Fe–Cr–Ni alloys. The Fe–Co alloys that were tested are hyper-peritectic compositions, while the Fe–Cr–Ni alloys were evaluated as pseudobinary hypoeutectic compositions. The results show that for a given heat flux there will be a minimum undercooling for which dendritic growth can be supported. The predicted growth velocity which corresponds to that minimum undercooling agrees reasonably well with the measured experimental growth velocity data suggesting that the growth of the stable phase into the mushy zone occurs under the minimum conditions required to support dendritic growth. [ABSTRACT FROM AUTHOR]
Copyright of Acta Materialia is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 122291321
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Lateral heat flux and remelting during growth into the mushy-zone.
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  Data: <searchLink fieldCode="AR" term="%22Rodriguez%2C+Justin+E%2E%22">Rodriguez, Justin E.</searchLink><relatesTo>1</relatesTo><i> Rodrigu.Ju@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Matson%2C+Douglas+M%2E%22">Matson, Douglas M.</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Acta+Materialia%22">Acta Materialia</searchLink>. May2017, Vol. 129, p408-414. 7p.
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  Data: <searchLink fieldCode="DE" term="%22Heat+flux%22">Heat flux</searchLink><br /><searchLink fieldCode="DE" term="%22Containerless+processing%22">Containerless processing</searchLink><br /><searchLink fieldCode="DE" term="%22Rapid+solidification+processing+of+metals%22">Rapid solidification processing of metals</searchLink><br /><searchLink fieldCode="DE" term="%22Iron+alloys%22">Iron alloys</searchLink><br /><searchLink fieldCode="DE" term="%22Metastable+states%22">Metastable states</searchLink><br /><searchLink fieldCode="DE" term="%22Hypoeutectic+alloys%22">Hypoeutectic alloys</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: In the context of dendritic rapid solidification, the goal of this work was to develop a model that describes growth of the stable phase in the presence of a preexisting metastable phase without requiring in-depth knowledge of the local geometry of the growing dendrite or the growth environment. Results facilitate predictive computational materials modeling of the transformation sequence, solidification path and microstructural evolution during industrial casting operations. The model was evaluated using mushy-zone growth velocity data from Fe–Co and Fe–Cr–Ni alloys. The Fe–Co alloys that were tested are hyper-peritectic compositions, while the Fe–Cr–Ni alloys were evaluated as pseudobinary hypoeutectic compositions. The results show that for a given heat flux there will be a minimum undercooling for which dendritic growth can be supported. The predicted growth velocity which corresponds to that minimum undercooling agrees reasonably well with the measured experimental growth velocity data suggesting that the growth of the stable phase into the mushy zone occurs under the minimum conditions required to support dendritic growth. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Acta Materialia is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.actamat.2017.02.078
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      – Code: eng
        Text: English
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        PageCount: 7
        StartPage: 408
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      – SubjectFull: Heat flux
        Type: general
      – SubjectFull: Containerless processing
        Type: general
      – SubjectFull: Rapid solidification processing of metals
        Type: general
      – SubjectFull: Iron alloys
        Type: general
      – SubjectFull: Metastable states
        Type: general
      – SubjectFull: Hypoeutectic alloys
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      – TitleFull: Lateral heat flux and remelting during growth into the mushy-zone.
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              Text: May2017
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