Influence of chemical composition and residual stresses on mechanical properties of duplex stainless steel studied by X-ray and neutron diffraction

Abstract

The parameters characterizing the elastoplastic mechanical behaviour of each phase in textured austeno-ferritic duplex stainless steels were determined using X-ray and neutron diffraction during uniaxial tensile test. A self consistent model was used to predict the evolution of the internal stresses during loading, and to identify critical resolved shear stresses \and strain hardening parameters of the material. Calculations based on this model were compared with the results of mechanical tests and diffraction data. The effect of residual stresses and the chemical composition on the elastoplastic phase behaviour was determined.

Keywords:

• Neutron and X-ray diffraction
• Phase stresses
• Duplex stainless steels
• Self-consistent model