论文信息 - Modelling of residual stress minimization through martensitic transformation in stainless steel welds

Modelling of residual stress minimization through martensitic transformation in stainless steel welds

Weld residual stresses often have serious implications for the integrity of engineering structures. Numerical models provide a way to assess full-field residual stress distributions as a complement to experimental methods. A finite element model was built to estimate the residual stresses that are generated when a single pass weld bead is deposited on to an austenitic stainless steel base plate. The objective was to investigate how and to what extent the martensitic transformation of the stainless steel welding consumable can mitigate potentially harmful tensile residual stresses. Two single-pass welds were deposited using gas metal arc welding (GMAW) on 12 mm thick 304L steel plates using a purpose designed martensitic alloy and a commercial non-transforming austenitic welding alloy. The model was verified with experimental data obtained from neutron diffraction experiments carried out on welded plates.

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