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LCF Assessment of Electron-Beam-Welded Notched Parts of Nickel-Based Superalloy Inconel 718

[+] Author Affiliations
Huang Yuan

Tsinghua University, Peking, ChinaUniversity of Wuppertal, Wuppertal, Germany

Jie Fang

University of Wuppertal, Wuppertal, Germany

Paper No. GT2014-25015, pp. V07AT29A002; 5 pages
doi:10.1115/GT2014-25015
From:
  • ASME Turbo Expo 2014: Turbine Technical Conference and Exposition
  • Volume 7A: Structures and Dynamics
  • Düsseldorf, Germany, June 16–20, 2014
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4576-9
  • Copyright © 2014 by ASME

abstract

In the present work the local mechanical behavior and fatigue resistance of the welding material were investigated with help of the instrumented indentation technique in combining with FEM computations. By assuming a power-law strain hardening, the elastic-plastic properties of the welding material were identified from inverse indentation analysis with help of finite element simulation. A critical plane based Cruse-Meyer model was introduced to predict the LCF fatigue life of the weld joints. Combined with the critical distance concept, the fatigue life in center-holed specimens was investigated and verified with experiments.

Copyright © 2014 by ASME

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