Load partitioning between single bulk grains in a two-phase duplex stainless steel during tensile loading
2010 (English)In: Acta Materialia, ISSN 1359-6454, E-ISSN 1873-2453, Vol. 58, no 2, 734-744 p.Article in journal (Refereed) Published
The lattice strain tensor evolution for single bulk grains of austenite and ferrite in a duplex stainless steel during tensile loading to 0.02 applied strain has been investigated using in situ high-energy X-ray measurements and finite-element modeling. Single-grain X-ray diffraction lattice strain data for the eight austenite and seven ferrite grains measured show a large variation of residual lattice strains, which evolves upon deformation to the point where some grains with comparable crystallographic orientations have lattice strains different by 1.5 x 10(-3), corresponding to a stress of similar to 300 MPa. The finite-element simulations of the 15 measured grains in three different spatial arrangements confirmed the complex deformation constraint and importance of local grain environment.
Place, publisher, year, edition, pages
2010. Vol. 58, no 2, 734-744 p.
X-ray diffraction, Synchrotron radiation, Stainless steels, Finite-element modeling (FEM), Single-grain strain
IdentifiersURN: urn:nbn:se:kth:diva-29109DOI: 10.1016/j.actamat.2009.09.053ISI: 000272917000041OAI: oai:DiVA.org:kth-29109DiVA: diva2:391416
QC 201101252011-01-252011-01-252011-01-25Bibliographically approved