Eigenstrain analysis of redisual stresses due to welding and post-weld heat treatment of aerospace materials

Alexander M. Korsunsky, Tea Sung Jun

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)

Abstract

Welding, surface treatment, plastic forming and other manufacturing processes generate residual stresses and introduce distortion in engineering components and assemblies. The knowledge of residual stress states is important for the ability to predict the subsequent in-service behaviour in response to thermo-mechanical loading, including the propensity to suffer further distortion, and particularly the initiation and propagation of fatigue cracks. Inertia friction welding between Ni-base superalloy components was considered in the present study. The process is increasingly used in the aerospace industry for butt joining of hollow cylindrical components, such as shafts and drums. Inverse eigenstrain framework was used for the interpretation of neutron diffraction measurements in order to find the underlying eigenstrain distributions. The advantage of this approach lies in the fact that limited sets of experimental residual strain data from neutron diffraction measurements can be used to obtain an approximate reconstruction of the complete stress tensor within the entire component. Subsequently an eigenstrain distribution was introduced into the component model that was subjected to heat treatment history to monitor stress relaxation. The advantages and limitations of the approach are discussed.

Original languageEnglish
Title of host publicationThe Minerals, Metals and Materials Society - 3rd International Conference on Processing Materials for Properties 2008, PMP III
Pages738-743
Number of pages6
Publication statusPublished - 2009
Externally publishedYes
Event3rd International Conference on Processing Materials for Properties 2008, PMP III - Bangkok, Thailand
Duration: 7 Dec 200810 Dec 2008

Publication series

NameThe Minerals, Metals and Materials Society - 3rd International Conference on Processing Materials for Properties 2008, PMP III
Volume2

Conference

Conference3rd International Conference on Processing Materials for Properties 2008, PMP III
Country/TerritoryThailand
CityBangkok
Period7/12/0810/12/08

Keywords

  • Creep
  • Eigenstrain
  • Friction welding
  • Post-weld heat treatment
  • Residual stress

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