Nitridation of Three Austenitic Alloys at 1100 °C
Journal article, 2025

The nitridation of three austenitic high-temperature alloys in 95% N2 + 5% H2 environment at 1100 degrees C was evaluated in terms of gravimetry and investigated by SEM-EDS, EPMA and STEM. Samples made from Alloy 600, 253 MA and 353 MA were exposed for 1 day, 1 week and 3 weeks. Alloy 600 underwent very little nitridation, while 253 MA and especially 353 MA, were heavily affected by nitride precipitation. The nitridation of all three alloys had reached equilibrium after three weeks; the extent of nitridation depending on the chromium activity in the alloy. The kinetics of nitrogen ingress into the alloy depends on nickel concentration, while the rate-determining step in the nitridation process is the nucleation and growth of the nitride precipitates.

SEM

EPMA

Alloy

High-temperature corrosion

STEM

Author

Tommy Sand

Chalmers, Chemistry and Chemical Engineering, Energy and Material

A. Rajagopal

Alleima

Mohammad Sattari

Chalmers, Physics, Microstructure Physics

S. Bigdeli

Höganäs

M. Haettestrand

Alleima

Jan-Erik Svensson

Chalmers, Chemistry and Chemical Engineering, Energy and Material

Mats Halvarsson

Chalmers, Physics, Microstructure Physics

Lars-Gunnar Johansson

Materials Chemistry

High Temperature Corrosion of Materials

27318400 (eISSN)

Vol. 102 2 10

Subject Categories (SSIF 2025)

Metallurgy and Metallic Materials

Surface- and Corrosion Engineering

Other Materials Engineering

DOI

10.1007/s11085-025-10331-9

More information

Latest update

4/3/2025 1