Mechanical and microstructural investigations of nitrided Fe-Cr layers

Nano-indentation measurements were carried out on nitrided Fe-Cr alloys (1 and 3 wt% Cr) in order to determine local micro-mechanical properties. The method recently developed on nitrided 32CrMoV13 steel was applied to the Fe-Cr alloys. Evolution of micro-yield stress through the nitrided layer was...

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Veröffentlicht in:	Journal of materials science 2004-07, Vol.39 (14), p.4533-4541
Hauptverfasser:	SENNOUR, M, JACQ, C, ESNOUF, C
Format:	Artikel
Sprache:	eng
Schlagworte:	Alloy development Applied sciences Chromium nitride Condensed matter: structure, mechanical and thermal properties Cross-disciplinary physics: materials science rheology Engineering Sciences Exact sciences and technology Ferrous alloys Iron Materials Materials science Mechanical and acoustical properties Mechanical properties Metals. Metallurgy Nanoindentation Phase diagrams and microstructures developed by solidification and solid-solid phase transformations Physical properties of thin films, nonelectronic Physics Precipitates Precipitation Precipitation hardening Solid-phase precipitation Surface hardening: nitridation, carburization, carbonitridation Surface treatments Surfaces and interfaces thin films and whiskers (structure and nonelectronic properties) Transmission electron microscopy Yield stress
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Zusammenfassung:	Nano-indentation measurements were carried out on nitrided Fe-Cr alloys (1 and 3 wt% Cr) in order to determine local micro-mechanical properties. The method recently developed on nitrided 32CrMoV13 steel was applied to the Fe-Cr alloys. Evolution of micro-yield stress through the nitrided layer was correlated to microstructural parameters (volume fraction of CrN precipitates, diameter of precipitates, etc.) investigated and statistically analyzed by transmission electron microscopy (TEM). The results show that the mechanical behavior of the nitrided layer for both alloys studied can be described using the Orowan model of precipitation strengthening.
ISSN:	0022-2461 1573-4803
DOI:	10.1023/B:JMSC.0000034147.58126.f8