Thermal autofrettage of dissimilar material brazed joints

Niall Robert Hamilton, James Wood, David Easton, Mikael Olsson Robbie, Yuxuan Zhang, Alexander Galloway

Research output: Contribution to journalArticle

10 Citations (Scopus)
148 Downloads (Pure)

Abstract

This paper presents a study on the effects of thermal autofrettage on the residual stresses in a Titanium – Copper brazed joint. It is shown that cryogenic thermal autofrettage has the potential to alter the residual stress field due to joining, in a manner that should result in an improvement in the subsequent operational fatigue performance of dissimilar material joints. Beneficial change in the residual stress field in the less-ductile component of the joint is apparent and desirable constitutive characteristics of the braze material to enhance the final residual stress field are also highlighted. Results from the finite element simulations are validated using experimental residual stress measurements produced using X-ray Diffraction. The characteristics of the process and the findings of the work presented should also be relevant to dissimilar material joints manufactured by other processes.
Original languageEnglish
Pages (from-to)405-412
Number of pages7
JournalMaterials and Design
Volume67
Early online date27 Nov 2014
DOIs
Publication statusPublished - Feb 2015

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Keywords

  • thermal autofrettage
  • residual stresses
  • finite element analysis
  • X-ray diffraction
  • validation

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