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

被引:6
作者
Taran, Yu V. [1 ]
Balagurov, A. M. [1 ]
Sabirov, B. M. [2 ]
Evans, A. [3 ]
Davydov, V. [3 ]
Venter, A. M. [4 ]
机构
[1] Joint Inst Nucl Res, Frank Lab Neutron Phys, Dubna, Russia
[2] Joint Inst Nucl Res, Dzhelepov Lab Nucl Problems, Dubna, Russia
[3] Paul Scherrer Inst, SINQ, Villigen, Switzerland
[4] NECSA Ltd, Div Res & Dev, Pretoria, South Africa
来源
5TH EUROPEAN CONFERENCE ON NEUTRON SCATTERING | 2012年 / 340卷
关键词
DIFFRACTION;
D O I
10.1088/1742-6596/340/1/012105
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
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.
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页数:8
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