M. Sroka, A. Zieliński
This paper presents the results of the analysis of the precipitation process in S31035 (22Cr25Ni3W3CuCoNbN) steel after long-term ageing at 750 °C for up to 30,000 h. The identification of precipitates was carried out using selective electron diffraction with FEI TITAN 80–300 transmission electron microscope. In the microstructure of the test steel in the as-received condition, the primary precipitates of Z phase were revealed. Ageing has contributed to the precipitation of secondary phases at the grain boundaries, twin boundaries and inside the grains. At the grain boundaries, M 23C6 carbides and Laves phase precipitates were revealed during the initial period of ageing. Longer ageing times resulted in the occurrence of sigma phase and G phase particles at the boundaries. Only M 23C6 carbides were observed at the twin boundaries. In turn, inside the grains, the presence of ε_Cu particles, Laves phase and secondary Z phase precipitates was demonstrated. In addition, single complexes of precipitates consisting of the primary Z phase particles and M 23C6 carbides nucleating on them as well as the Laves phase precipitates were revealed near the grain boundaries.
@article{6ea4b01b-2ba6-405c-8592-c3b11deefa46,
title={2026 Sroka S31035 Precipitation Microstructure},
author={M. Sroka and A. Zieliński},
year={2026},
language={en}
}TY - JOUR TI - 2026 Sroka S31035 Precipitation Microstructure AU - M. Sroka AU - A. Zieliński PY - 2026 LA - en ER -
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