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Phase transformation study of aluminium-containing ductile cast irons by dilatometry

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Title: Phase transformation study of aluminium-containing ductile cast irons by dilatometry
Authors: Kiani-Rashid, A.R.1 fkiana@yahoo.com, Edmonds, D.V.2
Source: Materials Science & Engineering: A. May2008, Vol. 481-482, p752-756. 5p.
Subjects: Martensitic transformations, Aluminum, Micromechanics, Heating equipment
Abstract: Abstract: The temperature for the start of martensite formation (MS) for three Al-alloyed ductile cast irons containing 0.48, 4.88 and 6.16wt.%Al were determined by high-speed dilatometry. Microscopic observations were also used to indicate the effects of aluminium addition on the martensite transformation during quenching. Various heat treatment cycles, with different continuous cooling and isothermal heat treatments, were used for the experimental irons to indicate the phase transformation in the solid state. The examination confirmed that an austenite/martensite transformation occurs for irons containing 0.48 and 4.88wt.%Al. The results indicate that martensitic transformation occurs at about 200°C for 0.48wt.%Al and about 190°C for 4.88wt.%Al. In contrast, there was no evidence of the martensitic transformation for 6.16wt.%Al. It was further found that for the 4.88wt.%Al experimental alloy used, isothermal transformation at 350°C for different soaking times gave a typical bainitic microstructure that increased with increasing time of austempering. [Copyright &y& Elsevier]
Copyright of Materials Science & Engineering: A 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.)
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Header DbId: egs
DbLabel: Engineering Source
An: 31702464
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PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Phase transformation study of aluminium-containing ductile cast irons by dilatometry
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  Data: <searchLink fieldCode="JN" term="%22Materials+Science+%26+Engineering%3A+A%22">Materials Science & Engineering: A</searchLink>. May2008, Vol. 481-482, p752-756. 5p.
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  Data: <searchLink fieldCode="DE" term="%22Martensitic+transformations%22">Martensitic transformations</searchLink><br /><searchLink fieldCode="DE" term="%22Aluminum%22">Aluminum</searchLink><br /><searchLink fieldCode="DE" term="%22Micromechanics%22">Micromechanics</searchLink><br /><searchLink fieldCode="DE" term="%22Heating+equipment%22">Heating equipment</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Abstract: The temperature for the start of martensite formation (MS) for three Al-alloyed ductile cast irons containing 0.48, 4.88 and 6.16wt.%Al were determined by high-speed dilatometry. Microscopic observations were also used to indicate the effects of aluminium addition on the martensite transformation during quenching. Various heat treatment cycles, with different continuous cooling and isothermal heat treatments, were used for the experimental irons to indicate the phase transformation in the solid state. The examination confirmed that an austenite/martensite transformation occurs for irons containing 0.48 and 4.88wt.%Al. The results indicate that martensitic transformation occurs at about 200°C for 0.48wt.%Al and about 190°C for 4.88wt.%Al. In contrast, there was no evidence of the martensitic transformation for 6.16wt.%Al. It was further found that for the 4.88wt.%Al experimental alloy used, isothermal transformation at 350°C for different soaking times gave a typical bainitic microstructure that increased with increasing time of austempering. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Materials Science & Engineering: A 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.msea.2007.02.167
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      – Code: eng
        Text: English
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        PageCount: 5
        StartPage: 752
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      – SubjectFull: Martensitic transformations
        Type: general
      – SubjectFull: Aluminum
        Type: general
      – SubjectFull: Micromechanics
        Type: general
      – SubjectFull: Heating equipment
        Type: general
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      – TitleFull: Phase transformation study of aluminium-containing ductile cast irons by dilatometry
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              Text: May2008
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              Value: 481-482
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