Fundamental Models for Creep Properties of Steels and Copper

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• 作者：Rolf Sandström
• 关键词：Creep ; Modelling ; Brittle rupture ; Cavitation
• 刊名：Transactions of the Indian Institute of Metals
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：69
• 期：2
• 页码：197-202
• 全文大小：600 KB
• 参考文献：1.Holdsworth S R, Askins M, Baker A, Gariboldi E, Holmstrom S, Klenk A, Ringel M, Merckling G, Sandstrom R, Schwienheer M, Spigarelli S, Int J Pres Vessel Pip 85 (2008) 80.CrossRef
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• 作者单位：Rolf Sandström (1)
  
  1. Department of Materials Science and Engineering, KTH Royal Institute of Technology, Brinellvägen 23, SE-100 44, Stockholm, Sweden
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Materials Science
  Metallic Materials
  Materials Science, general
  Tribology, Corrosion and Coatings
  
• 出版者：Springer India
• ISSN：0975-1645

文摘

New fundamental creep models have been developed based on physical mechanisms. They involve no adjustable (fitting) parameters. This is a good basis for long term extrapolation, which is needed in advanced fossil fired power plants and third and fourth generation nuclear plants. It is demonstrated that the models give sufficiently precise predictions that the results can be applied technically. In the paper, results for austenitic stainless steels and copper are presented. The development of the microstructure is followed during creep. The work hardening and recovery of the dislocation structure are considered as well as the role of the substructure. Nucleation, growth and coarsening of precipitates are taken into account. The influence of substitutional and interstitial elements in solid solution is covered. Nucleation and growth of creep cavities are considered. Properties that have been accurately described include creep rupture strength and creep elongation. The influence of brittle rupture on the creep strength by taking cavitation into account has been analysed. Keywords Creep Modelling Brittle rupture Cavitation