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Application of the cluster/site approximation to fcc phases in Ni–Al–Cr system

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Title: Application of the cluster/site approximation to fcc phases in Ni–Al–Cr system
Authors: Cao, W.1, Zhu, J.1, Yang, Y.1, Zhang, F.2, Chen, S.2, Oates, W.A.3, Chang, Y.A.1 chang@engr.wisc.edu
Source: Acta Materialia. Sep2005, Vol. 53 Issue 15, p4189-4197. 9p.
Subjects: Chemical engineering approximation methods, Ternary alloys, Approximation theory, Alloys, Ternary system
Abstract: Abstract: The cluster/site approximation (CSA) has been used to model the face-centered cubic (fcc) phases (disordered γ with A1 structure and ordered γ′ with L12 structure) in the Ni–Al–Cr ternary system. The CSA takes into account short-range order (SRO), which is essential to satisfactorily describe the thermodynamics of order/disorder transitions such as occur between the fcc phases in the Ni–Al–Cr system. It possesses computational advantages over the cluster variation method (CVM) while offering comparable accuracy in the calculation of multi-component phase diagrams. This makes the CSA a practical method for carrying out calculations on real alloy systems. These points are illustrated in the application of the CSA to fcc phases in the Ni–Al–Cr system. The CSA-calculated phase diagrams, which use fewer model parameters than used in previous descriptions, based on the point approximation, are in good accord with the experimental data. In addition, the fcc metastable phase diagrams calculated by using the CSA show reasonable ordering/disordering behavior and phase relationships. [Copyright &y& Elsevier]
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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DbLabel: Engineering Source
An: 18195063
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PubTypeId: academicJournal
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  Data: Application of the cluster/site approximation to fcc phases in Ni–Al–Cr system
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  Data: <searchLink fieldCode="AR" term="%22Cao%2C+W%2E%22">Cao, W.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Zhu%2C+J%2E%22">Zhu, J.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Yang%2C+Y%2E%22">Yang, Y.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Zhang%2C+F%2E%22">Zhang, F.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Chen%2C+S%2E%22">Chen, S.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Oates%2C+W%2EA%2E%22">Oates, W.A.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Chang%2C+Y%2EA%2E%22">Chang, Y.A.</searchLink><relatesTo>1</relatesTo><i> chang@engr.wisc.edu</i>
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  Data: <searchLink fieldCode="JN" term="%22Acta+Materialia%22">Acta Materialia</searchLink>. Sep2005, Vol. 53 Issue 15, p4189-4197. 9p.
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  Data: <searchLink fieldCode="DE" term="%22Chemical+engineering+approximation+methods%22">Chemical engineering approximation methods</searchLink><br /><searchLink fieldCode="DE" term="%22Ternary+alloys%22">Ternary alloys</searchLink><br /><searchLink fieldCode="DE" term="%22Approximation+theory%22">Approximation theory</searchLink><br /><searchLink fieldCode="DE" term="%22Alloys%22">Alloys</searchLink><br /><searchLink fieldCode="DE" term="%22Ternary+system%22">Ternary system</searchLink>
– Name: Abstract
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  Data: Abstract: The cluster/site approximation (CSA) has been used to model the face-centered cubic (fcc) phases (disordered γ with A1 structure and ordered γ′ with L12 structure) in the Ni–Al–Cr ternary system. The CSA takes into account short-range order (SRO), which is essential to satisfactorily describe the thermodynamics of order/disorder transitions such as occur between the fcc phases in the Ni–Al–Cr system. It possesses computational advantages over the cluster variation method (CVM) while offering comparable accuracy in the calculation of multi-component phase diagrams. This makes the CSA a practical method for carrying out calculations on real alloy systems. These points are illustrated in the application of the CSA to fcc phases in the Ni–Al–Cr system. The CSA-calculated phase diagrams, which use fewer model parameters than used in previous descriptions, based on the point approximation, are in good accord with the experimental data. In addition, the fcc metastable phase diagrams calculated by using the CSA show reasonable ordering/disordering behavior and phase relationships. [Copyright &y& Elsevier]
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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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