Comparison of strain/stress behaviour of a duplex stainless steel between mesoscopic and macroscopic scales by neutron measurements extended to the necking range

Abstract : The mechanical behaviour of a duplex stainless steel is investigated through mesoscopic measurements by diffraction method. Especially, the lattice strains for large tensile macro-deformation, up to the fracture of the sample, were measured using Time-Of-Flight neutron diffraction method. A former study has been extended to the necking range, using special correction for macro-stress values. It has been found that during large plastic deformation the lattice stresses increase almost linearly with the macro-stress value. The experimental results enable also to verify the stress concentration tensor predicted by self-consistent model. For those large deformations, mechanical effects of ductile damage have been observed.
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Submitted on : Monday, September 2, 2019 - 3:57:58 PM
Last modification on : Monday, September 16, 2019 - 4:35:50 PM

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Manuel Francois, Benoît Panicaud, Léa Le Joncour, A. Baczmański, A. Paradowska, et al.. Comparison of strain/stress behaviour of a duplex stainless steel between mesoscopic and macroscopic scales by neutron measurements extended to the necking range. Thin Solid Films, Elsevier, 2013, 530, pp.62-65. ⟨10.1016/j.tsf.2012.07.065⟩. ⟨hal-02276445⟩

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