Neutron diffraction studies of laser welding residual stresses

Peter I. Petrov; Gizo D. Bokuchava; Igor V. Papushkin; Gancho Genchev; Nikolay Doynov; Vesselin G. Michailov; Maria A. Ormanova

doi:10.1117/12.2261802

5 January 2017 Neutron diffraction studies of laser welding residual stresses

Peter I. Petrov, Gizo D. Bokuchava, Igor V. Papushkin, Gancho Genchev, Nikolay Doynov, Vesselin G. Michailov, Maria A. Ormanova

Author Affiliations +

Proceedings Volume 10226, 19th International Conference and School on Quantum Electronics: Laser Physics and Applications; 102260D (2017) https://doi.org/10.1117/12.2261802
Event: International Conference and School on Quantum Electronics "Laser Physics and Applications" - ICSQE 2016, 2016, Sozopol, Bulgaria

Abstract

The residual stress and microstrain distribution induced by laser beam welding of the low-alloyed C45 steel plate was investigated using high-resolution time-of-flight (TOF) neutron diffraction. The neutron diffraction experiments were performed on FSD diffractometer at the IBR-2 pulsed reactor in FLNP JINR (Dubna, Russia). The experiments have shown that the residual stress distribution across weld seam exhibit typical alternating sign character as it was observed in our previous studies. The residual stress level is varying in the range from -60 MPa to 450 MPa. At the same time, the microstrain level exhibits sharp maxima at weld seam position with maximal level of ∼4.8·10^-3. The obtained experimental results are in good agreement with FEM calculations according to the STAAZ model. The provided numerical model validated with measured data enables to study the influence of different conditions and process parameters on the development of residual welding stresses.

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Peter I. Petrov, Gizo D. Bokuchava, Igor V. Papushkin, Gancho Genchev, Nikolay Doynov, Vesselin G. Michailov, and Maria A. Ormanova "Neutron diffraction studies of laser welding residual stresses", Proc. SPIE 10226, 19th International Conference and School on Quantum Electronics: Laser Physics and Applications, 102260D (5 January 2017); https://doi.org/10.1117/12.2261802

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