Unified modeling of high temperature deformations of a Ni-based polycrystalline wrought superalloy under tension-compression, cyclic, creep and creep-fatigue loadings

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• 作者：Jia Huang ; DuoQi Shi ; XiaoGuang Yang ; HuiChen Yu…
• 关键词：superalloy ; constitutive relation ; fatigue ; creep ; creep ; fatigue interaction
• 刊名：SCIENCE CHINA Technological Sciences
• 出版年：2015
• 出版时间：February 2015
• 年：2015
• 卷：58
• 期：2
• 页码：248-257
• 全文大小：2,430 KB
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• 作者单位：Jia Huang (1)
  DuoQi Shi (1)
  XiaoGuang Yang (1)
  HuiChen Yu (2)
  ChengLi Dong (2)
  
  1. School of Energy and Power Engineering, Beihang University, Beijing, 100191, China
  2. Beijing Institute of Aeronautical Materials, Beijing, 100095, China
  
• 刊物类别：Engineering
• 刊物主题：Chinese Library of Science
  Engineering, general
  
• 出版者：Science China Press, co-published with Springer
• ISSN：1869-1900

文摘

The complex deformation behaviors under tension-compression, cyclic, creep and creep-fatigue loadings of a nickel-base polycrystalline wrought superalloy at 650°C and 700°C were experimentally investigated. To uniformly simulate the complex deformation behaviors, the modified viscoplastic constitutive model combined with both the Kachanov damage evolution equation and the Ohno-Wang modification was formulated on the basis of the Chaboche theory. The simulated results on tension-compression behavior, cyclic viscoplastic and creep deformations showed comprehensive predicting ability. With the obtained material parameters, the deformations in creep-fatigue interaction under three dwell types were simulated and the capability of the modified model was further verified with good accuracy.