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Finite element analysis of residual stresses in metallic coatings through a compound casting

journal contribution
posted on 2014-01-01, 00:00 authored by Y Liu, Y Chen, Bernard RolfeBernard Rolfe, C Yang
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. © (2014) Trans Tech Publications, Switzerland.

History

Journal

Applied mechanics and materials

Volume

553

Pagination

48 - 53

Publisher

Trans Tech Publications

Location

Stafa-Zurich, Switzerland

ISSN

1660-9336

eISSN

1662-7482

ISBN-13

9783038350682

Language

eng

Publication classification

C Journal article; C1 Refereed article in a scholarly journal

Copyright notice

2014, Trans Tech Publications

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