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Applied Mathematics and Mechanics (English Edition) ›› 1999, Vol. 19 ›› Issue (2): 186-192.

• 论文 • 上一篇    下一篇

MESO APPROACHES FOR THE CREEP DAMAGE BEHAVIOR OF NICKEL-BASE DIRECTIONALLY SOLIDIFIED SUPERALLOYS

岳珠峰, 吕震宙, 郑长卿   

  1. Department of Applied Mechanics, Northwestem Polytechnical University, P. O. Box 350, Xi'an 710072, P. R. China
  • 收稿日期:1996-10-18 修回日期:1998-09-26 出版日期:1999-02-18 发布日期:1999-02-18
  • 基金资助:

    Project supported by the National Natural Science Foundation of China(59501009) and Opening Research Foundation of National Key Laboratory in Xi'an Jiaotong University

MESO APPROACHES FOR THE CREEP DAMAGE BEHAVIOR OF NICKEL-BASE DIRECTIONALLY SOLIDIFIED SUPERALLOYS

Yue Zhufeng, Lü Zhenzhou, Zheng Changqing   

  1. Department of Applied Mechanics, Northwestem Polytechnical University, P. O. Box 350, Xi'an 710072, P. R. China
  • Received:1996-10-18 Revised:1998-09-26 Online:1999-02-18 Published:1999-02-18
  • Supported by:

    Project supported by the National Natural Science Foundation of China(59501009) and Opening Research Foundation of National Key Laboratory in Xi'an Jiaotong University

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摘要： A self-consistent creep damage constitutive model and a finite element model hove been developed for nickel-base directionally solidified superalloys.Grain degradation and grain boundary voiding are considered.The model parameters are determined from the creep test bata of a single crystal and a directionally solidified superalloy with a special crystallographic orientation.The numerical analysis shows that the modeled creep damage behaviors of nickel-base directionally solidified superalloys with different crystallographic orientations are in good agreement with the experimental beta.

关键词: directionally solidified superalloy, creep meso damage, finite element model, self-consistent model

Abstract: A self-consistent creep damage constitutive model and a finite element model hove been developed for nickel-base directionally solidified superalloys.Grain degradation and grain boundary voiding are considered.The model parameters are determined from the creep test bata of a single crystal and a directionally solidified superalloy with a special crystallographic orientation.The numerical analysis shows that the modeled creep damage behaviors of nickel-base directionally solidified superalloys with different crystallographic orientations are in good agreement with the experimental beta.

Key words: directionally solidified superalloy, creep meso damage, finite element model, self-consistent model

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