Details

Autor(en) / Beteiligte

• Fernandes, Frederico A.P.
• Christiansen, Thomas L.
• Winther, Grethe
• Somers, Marcel A.J.

Titel

On the determination of stress profiles in expanded austenite by grazing incidence X-ray diffraction and successive layer removal

Ist Teil von

• Acta materialia, 2015-08, Vol.94, p.271-280

Ort / Verlag

Elsevier Ltd

Erscheinungsjahr

2015

Link zum Volltext

Quelle

Elsevier ScienceDirect Journals Complete

Beschreibungen/Notizen

• Surface layers of expanded austenite resulting from nitriding typically exhibit large gradients in residual stress and composition. Evaluation of residual-stress profiles is explored by means of grazing incidence X-ray diffraction (GI-XRD), probing shallow depths, combined with successive layer removal. Several factors complicating the stress determination are analysed and discussed: (1) ghost stresses arising from a small variation in the shallow information depths probed with GI-XRD, (2) selection of the grain interaction model used to calculate the X-ray elastic constants for conversion of lattice strains into residual stress and (3) the composition dependence of these elastic constants.