The metallurgy, mechanics, modelling and assessment of dissimilar material brazed joints

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

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

At the heart of any procedure for modelling and assessing the design or failure of dissimilar material brazed joints there must be a basic understanding of the metallurgy and mechanics of the joint. This paper is about developing this understanding and addressing the issues faced with modelling and predicting failure in real dissimilar material brazed joints and the challenges still to be overcome in many cases. An understanding of the key metallurgical features of such joints in relation to finite element modelling is presented in addition to a study of the mechanics and stress state at an abrupt interface between two materials. A discussion is also presented on why elastic singularities do not exist based on a consideration of the assumption of an abrupt change in material properties and plasticity in the vicinity of the joint. In terms of modelling real dissimilar material brazed joints; there are several barriers to accurately capturing the stress state in the region of the joint and across the brazed layer and these are discussed in relation to a metallurgical study of a real dissimilar material brazed joint. However, this does not preclude using a simplified modelling approach with a representative braze layer in design and failure assessment away from the interface. In addition modelling strategies and techniques for assessing the various failure mechanisms of dissimilar material brazed joints are discussed. The findings from this paper are applicable to dissimilar material brazed joints found in a range of applications; however the references listed are primarily focused on work in fusion research and development.
LanguageEnglish
Pages42-51
Number of pages10
JournalJournal of Nuclear Materials
Volume432
Issue number1-3
DOIs
Publication statusPublished - Jan 2013

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Dissimilar materials
metallurgy
Metallurgy
Mechanics
research and development
plastic properties
fusion
Plasticity
Materials properties
Fusion reactions

Keywords

  • metallurgy
  • mechanics
  • modelling and assessment
  • brazed joints
  • dissimilar material

Cite this

Hamilton, Niall Robert ; Wood, James ; Galloway, Alexander ; Olsson Robbie, Mikael ; Zhang, Yuxuan. / The metallurgy, mechanics, modelling and assessment of dissimilar material brazed joints. In: Journal of Nuclear Materials . 2013 ; Vol. 432, No. 1-3. pp. 42-51.
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The metallurgy, mechanics, modelling and assessment of dissimilar material brazed joints. / Hamilton, Niall Robert; Wood, James; Galloway, Alexander; Olsson Robbie, Mikael; Zhang, Yuxuan.

In: Journal of Nuclear Materials , Vol. 432, No. 1-3, 01.2013, p. 42-51.

Research output: Contribution to journalArticle

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