Paper Title:

On the Development of Grain-Orientation-Dependent and Inter-Phase Stresses in a Super Duplex Stainless Steel under Uniaxial Loading

Periodical Materials Science Forum (Volumes 524 - 525)
Main Theme Residual Stresses VII, ECRS7
Edited by W. Reimers and S. Quander
Pages 917-922
DOI 10.4028/www.scientific.net/MSF.524-525.917
Citation Ru Lin Peng et al., 2006, Materials Science Forum, 524-525, 917
Online since September, 2006
Authors Ru Lin Peng, Yan Dong Wang, Guo Cai Chai, Nan Jia, Sten Johansson, Gang Wang
Keywords Duplex Stainless Steel, Grain-Orientation-Dependent Stresses, In Situ Loading, Interphase Stress, Lattice Strains, Neutron Diffraction
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Abstract

Microstresses due to intergranular and inter-phase interactions in an austenitic-ferritic super duplex steel (SAF 2507) under uniaxial compressive deformation have been studied by in-situ neutron diffraction experiments. Lattice strains of several hkl planes of austenite respective ferrite were mapped as a function of sample direction at a number of load levels during loading into the plastic regime and unloading. The analysis of the experimental results has shown that during loading both grain-orientation-dependent and inter-phase stresses were generated under plastic deformation that was inhomogeneous at the microstructural level. Residual stresses depending on the grain-orientation and phase have been found after unloading. The results also indicate stronger intergranular interactions among the studied hkl planes of austenite than those of ferrite.