Damage prediction for un-coated and coated aluminum alloys under thermal and mechanical fatigue loadings based on a modified plastic strain energy approach

Azadi, M ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1016/j.matdes.2014.04.022
  3. Abstract:
  4. In this article, a novel energy-based lifetime prediction model has been presented for uncoated and coated aluminum alloys, subjected to thermal and mechanical fatigue loadings. For this objective, isothermal and thermo-mechanical fatigue tests were performed on the A356.0 alloy, with and without thermal barrier coating systems. This model, which was based on the plastic strain energy, had three correction factors including temperature, strain and mean stress effects. The predicted lifetime showed a proper agreement with experimental data. By the present model, higher accuracy was obtained in comparison to other existed approaches. Besides, the present model had lower number of material constants
  5. Keywords:
  6. Aluminum alloy ; Energy-based model ; Low cycle fatigue ; Thermal barrier coating ; Thermo-mechanical fatigue ; Aluminum ; Aluminum coatings ; Fatigue damage ; Fatigue testing ; Plastic coatings ; Plastic deformation ; Strain energy ; Thermal barrier coatings ; Correction factors ; Energy-based models ; Lifetime prediction models ; Low cycle fatigues ; Mean stress effects ; Mechanical fatigue ; Thermal barrier coating systems ; Thermo mechanical fatigues (TMF) ; Aluminum alloys
  7. Source: Materials and Design ; Volume 66, Issue PB , 2015 , Pages 587-595 ; 02613069 (ISSN)
  8. URL: http://www.sciencedirect.com/science/article/pii/S0261306914002908