Expanded austenite, crystallography and residual stress
2009; Maney Publishing; Volume: 26; Issue: 4 Linguagem: Inglês
10.1179/026708410x12506870724316
ISSN1743-2944
AutoresThomas L. Christiansen, Thomas S. Hummelshøj, Marcel A.J. Somers,
Tópico(s)Advanced ceramic materials synthesis
ResumoThe identity of expanded austenite as developing during low temperature nitriding and/or carburising of austenitic stainless steel has been under debate since the very first observation of this phase. In the present article, recent results obtained with (a) homogeneous samples of various uniform compositions and (b) unravelling of the contributions of stress–depth and composition–depth profiles in expanded austenite layers are summarised and discussed. It is shown through simulation of line profiles that the combined effects of composition gradients, stress gradients and stacking fault gradients can explain the observations in typical X-ray diffractograms.
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