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Residual stresses in coating-based systems, part I: Mechanisms and analytical modeling |
| ZHANG Xiancheng1, WU Yixiong2, XU Binshi3, WANG Haidou3 |
| 1.State Key Laboratory of Metal Matrix Composites, Shanghai Jiaotong University, Shanghai 200030, China; National Key Laboratory for Remanufacturing, Beijing 100072, China; 2.State Key Laboratory of Metal Matrix Composites, Shanghai Jiaotong University, Shanghai 200030, China; 3.National Key Laboratory for Remanufacturing, Beijing 100072, China; |
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Abstract Thin films and multi-layered coatings comprised of different classes of materials are often used for various functional devices. The thermo-mechanical integrity of these systems is becoming a major concern and is strongly related to the residual stresses because of the fabrication processes. In this paper, the sources of the residual stresses in the coating-based systems and the concept of misfit strain were briefly reviewed. Analytical models were developed to predict the residual stresses in multi-layered film structures or coating-based systems using the force and moment balances. In addition, the residual stress distributions in the func tionally and compositionally graded coatings were also analyzed.
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Issue Date: 05 March 2007
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