Details

Autor(en) / Beteiligte

• Carosi, A.
• Amati, M.
• Gregoratti, L.
• Kaciulis, S.
• Mezzi, A.
• Montanari, R.
• Rovatti, L.
• Ucciardello, N.

Titel

Heating modification of an austenitic steel with high-nitrogen content

Ist Teil von

• Surface and interface analysis, 2010-06, Vol.42 (6-7), p.726-729

Ort / Verlag

Chichester, UK: John Wiley & Sons, Ltd

Erscheinungsjahr

2010

Quelle

Wiley-Blackwell Journals

Beschreibungen/Notizen

• The micro‐structural changes of an austenitic steel with high‐nitrogen content have been investigated after heat treatments at 850 °C. Micro‐chemical composition of heat‐induced structures was analyzed using XPS, multipoint AES and photoemission spectro‐microscopy. Before the XPS, AES and photoemission spectro‐microscopy analyses, the samples were cleaned in situ by Ar ion sputtering. The results show that the discontinuous precipitation of Cr2 N from the nitrogen supersaturated γs phase is accompanied by a net flux of nitrogen toward the transformed zones, thus confirming that the principal force behind boundary migration is the nitrogen concentration gradient between the γ and γs phases. When γ and γs reach the same nitrogen concentration, the precipitation stops even if the transformation of the matrix has not yet been completed. Copyright © 2010 John Wiley & Sons, Ltd.