Formation Sequence of Interface Intermetallic Phases of Cold Rolling Cu/Al Clad Metal Sheet in Annealing Process

Lin Yang; Bing Xue Mi; Lin Lv; Hong Jun Huang; Xiao Ping Lin; Xiao Guang Yuan

doi:10.4028/www.scientific.net/MSF.749.600

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HomeMaterials Science ForumMaterials Science Forum Vol. 749Formation Sequence of Interface Intermetallic...

Formation Sequence of Interface Intermetallic Phases of Cold Rolling Cu/Al Clad Metal Sheet in Annealing Process

Abstract:

The formation Gibbs energy of the intermetallic phases at the interface of cold rolling Cu/Al clad metal sheet in annealing process was calculated theoretically. The concept and the calculating method of effective formation Gibbs energy which can predict the formation sequence was proposed. By the means of that theory, the calculated formation sequence of the intermetallic phases at 200-300 was worked out for the cold rolling Cu/Al clad metal sheet in annealing process, i.e. Al₂Cu (Al side), AlCu (mid-layer) and Al₄Cu₉(Cu side). Besides, the boundary layer organizational microstructure of the composite material was analyzed by the means of SEM and XRD. As a result, the annealing temperature is the primary factor which affects the formation of the intermetallic phases of the cold rolling Cu/Al clad metal sheet, while the holding time is the second one. The observed formation sequence of the intermetallic phases of cold rolling Cu/Al clad metal sheet on annealing temperature 250-300 was: Al₂Cu (Al side), Al₄Cu₉(Cu side) and AlCu (mid-side).

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Periodical:

Materials Science Forum (Volume 749)

Pages:

600-605

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.749.600

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Online since:

March 2013

Authors:

Lin Yang, Bing Xue Mi, Lin Lv, Hong Jun Huang, Xiao Ping Lin, Xiao Guang Yuan

Keywords:

Cu/Al Clad Metal Sheet, Diffusion, Formation Gibbs Free Energy, Intermetallic Phase, Thermodynamic Calculation

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