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Interactions between the phase stress and the grain-orientation-dependent stress in duplex stainless steel during deformation
Linköping University, The Institute of Technology. Linköping University, Department of Mechanical Engineering, Engineering Materials.
School of Materials and Metalluryg Northeastern University, Shenyang.
School of Materials and Metallurgy Northeastern University, Shenyang.
R D Sandvik Materials Technology, Sandviken.
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2006 (English)In: Acta Materialia, ISSN 1359-6454, Vol. 54, no 15, 3907-3916 p.Article in journal (Refereed) Published
Abstract [en]

The development of phase stress and grain-orientation-dependent stress under uniaxial compression was investigated in a duplex stainless steel consisting of austenite and ferrite. Using in situ neutron diffraction measurements, the strain response of several h k l planes to the applied compressive stress was mapped as a function of applied stress and sample direction. Analysis based on the experimental results and elastoplastic self-consistent simulations shows that phase stresses of thermal origin further increase during elastic loading but decrease with increased plastic deformation. Grain-orientation-dependent stresses become significant in both austenite and ferrite after loading into the plastic region. After unloading from the plastic regime, a considerable intergranular stress remains in the austenitic phase and dominates over the phase stress. This study provides fundamental experimental inputs for future micromechanical modeling aiming at the evaluation and prediction of the mechanical performance of multiphase materials. © 2006 Acta Materialia Inc.

Place, publisher, year, edition, pages
2006. Vol. 54, no 15, 3907-3916 p.
National Category
Engineering and Technology
URN: urn:nbn:se:liu:diva-34726DOI: 10.1016/j.actamat.2006.04.019Local ID: 22890OAI: diva2:255574
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2011-01-11

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