Residual stresses in a stainless steel – titanium alloy joint made with the explosive technique

Joining of pipes from stainless steel (SS) and titanium (Ti) alloy still experience serious technical problems. Recently, reliable and hermetic joining of SS and Ti pipes has been achieved with the explosive bonding technique in the Russian Federal Nuclear Center. Such adapters are earmarked for use...

Full description

Saved in:
Bibliographic Details
Published in:Journal of physics. Conference series 2012-01, Vol.340 (1), p.12105-8
Main Authors: Taran, Yu V, Balagurov, A M, Sabirov, B M, Evans, A, Davydov, V, Venter, A M
Format: Article
Language:English
Subjects:
Adapters
Axial stress
Coherent scattering
Explosive bonding
Joining
Liquid nitrogen
Mechanical properties
Neutron diffraction
Neutron scattering
Neutrons
Physics
Pipe
Residual stress
Scattering cross sections
Spallation
Stainless steel
Stainless steels
Steel pipes
Strain
Stresses
Thermal cycling
Titanium
Titanium alloys
Titanium base alloys
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Joining of pipes from stainless steel (SS) and titanium (Ti) alloy still experience serious technical problems. Recently, reliable and hermetic joining of SS and Ti pipes has been achieved with the explosive bonding technique in the Russian Federal Nuclear Center. Such adapters are earmarked for use at the future International Linear Collider. The manufactured SS-Ti adapters have excellent mechanical behavior at room and liquid nitrogen temperatures, during high-pressure tests and thermal cycling. We here report the first neutron diffraction investigation of the residual stresses in a SS-Ti adapter on the POLDI instrument at the SINQ spallation source. The strain scanning across the adapter walls into the SS-SS and SS-Ti pipes sections encompassed measurement of the axial, radial and hoop strain components, which were transformed into residual stresses. The full stress information was successfully determined for the three steel pipes involved in the joint. The residual stresses do not exceed 300 MPa in magnitude. All stress components have tensile values close to the adapter internal surface, whilst they are compressive close to the outer surface. The strong incoherent and weak coherent neutron scattering cross-sections of Ti did not allow for the reliable determination of stresses inside the titanic pipe.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/340/1/012105