Finite Element Analysis of Residual Stresses in Metallic Coatings through a Compound Casting

Yong Ning Liu; Yi Qing Chen; Bernard F. Rolfe; Chun Hui Yang

doi:10.4028/www.scientific.net/AMM.553.48

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 553Finite Element Analysis of Residual Stresses in...

Finite Element Analysis of Residual Stresses in Metallic Coatings through a Compound Casting

Abstract:

Al and Mg alloys are widely used in industry as main lightweight alloys. They have excellent properties, such as low density, high ductility, and high specific strength, and so on. Generally speaking, Mg alloys are better than Al alloys. However the corrosion of Mg alloys is much more difficult to control compared Al alloys. Therefore to combine these two lightweight alloys, a composite-like structure is an ideal solution since Al alloys can be used as protective coatings for Mg alloys. Compound casting is a realistic technique to get this coating system. In the current study, we numerically study the compound casting using finite element method (FEM) to make these two alloys, a composite-like structure, satisfy requirements to resist corrosion required from industry, in which the aluminum layer is acting as a protective coating for the magnesium substrate. Several finite element models have been developed by using the birth and death element technique and we focus on compound casting-induced residual stresses in the compounded structure. The numerical results obtained from the proposed finite element models show the distribution profiles of thermal residual stresses. We found the major factors influencing the residual stresses are the temperature to pre-heating the Al substrate and the thickness of Mg deposits.

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Periodical:

Applied Mechanics and Materials (Volume 553)

Pages:

48-53

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.553.48

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Online since:

May 2014

Authors:

Yong Ning Liu*, Yi Qing Chen, Bernard F. Rolfe, Chun Hui Yang

Keywords:

Aluminum (Al), Birth, Compound Casting, Death Element Technique, Finite Element Modeling (FEM), Mg, Residual Stress

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* - Corresponding Author

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