The Effect of Heat Treatment on Mechanical Properties of Thermally Sprayed Sandwich Structure Beams

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• 作者：Saeid Salavati ; Thomas W. Coyle ; Javad Mostaghimi
• 关键词：alloy 625 ; annealing ; cracking ; flextural test ; four point bending ; sandwich structure ; twin wire are spray
• 刊名：Journal of Thermal Spray Technology
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：25
• 期：1-2
• 页码：105-112
• 全文大小：4,014 KB
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  4.H.R.S. Jazi, J. Mostaghimi, S. Chandra, L. Pershin, and T. Coyle, Spray-Formed, Metal-Foam Heat Exchangers for High Temperature Applications, J. Therm. Sci. Eng. Appl., 2009, 1(3), p 031008CrossRef
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  6.S. Salavati, R. Rezaey, L. Pershin, T.W. Coyle, and J. Mostaghimi, Development of High Density Twin Wire Arc Sprayed Coatings on Metallic Foam Substrates a b, Proceedings of the International Thermal Spray Conference, 2013, p 345–350.
  7.F. Azarmi, T. Coyle, and J. Mostaghimi, Young’s Modulus Measurement and Study of the Relationship Between Mechanical Properties and Microstructure of Air Plasma Sprayed Alloy 625, Surf. Coat. Technol., 2009, 203(8), p 1045–1054CrossRef
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• 作者单位：Saeid Salavati (1)
  Thomas W. Coyle (1)
  Javad Mostaghimi (1)
  
  1. Centre for Advanced Coating Technologies, 8th Floor, Bahen Building, 40 St. George Street, Toronto, ON, M5S 3G8, Canada
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Surfaces and Interfaces and Thin Films
  Tribology, Corrosion and Coatings
  Materials Science
  Characterization and Evaluation Materials
  Operating Procedures and Materials Treatment
  Analytical Chemistry
  
• 出版者：Springer Boston
• ISSN：1544-1016

文摘

The application of metallic foam core sandwich structures in engineering components has been of particular interest in recent years because of their unique mechanical and thermal properties. Thermal spraying of the skin on the foam structure has recently been employed as a novel cost-efficient method for fabrication of these structures from refractory materials with complex shapes that could not otherwise be easily fabricated. The mechanical behavior of these structures under flexural loading is important in most applications. Previous studies have suggested that heat treatment of the thermally sprayed sandwich structures could improve the ductility of the skins and so affect the failure mode. In the present study, the mechanical behavior of sandwich beams prepared from arc sprayed alloy 625 skin on 40 ppi nickel foam was characterized under four point bending. The ductility of the arc sprayed alloy 625 coatings was improved after heat treatment at 1100 and 900 °C while the yield point was reduced. Heat treatment of the sandwich beams reduced the danger of catastrophic failure.