Kinetics of cellular precipitation in a 24Cr-15Ni-4Mn-0.03C-0.35N steel

The precipitation process for austenitic stainless steel is extremely complex. For example, more than eigthteen different precipitates were reported for an isothermally-aged type 316 steel. Thermal processing can promote intergranular and transgranular precipitation of carbides, nitrides, and other...

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Bibliographic Details
Published in:Journal of materials science 2004-08, Vol.39 (16-17), p.5537-5539
Main Authors: RODRIGUEZ-CASTILLO, M. E, LOPEZ-HIRATA, V. M, SAUCEDO-MUNOZ, M. L, DORANTES-ROSALES, H. J
Format: Article
Language:English
Subjects:
Applied sciences
Cellular precipitates
Exact sciences and technology
Materials science
Metals. Metallurgy
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Summary:The precipitation process for austenitic stainless steel is extremely complex. For example, more than eigthteen different precipitates were reported for an isothermally-aged type 316 steel. Thermal processing can promote intergranular and transgranular precipitation of carbides, nitrides, and other phases. Furthermore, the exposure of austenitic stainless steels to relatively high temperatures has been reported to cause the deterioration of mechanical properties, including ductility and toughness. In addition to the transgranular and intergranular precipitation, discontinuous or cellular precipitation has been observed to occur in different aged austenitic stainless steels. The following cellular precipitations *g RT *g + Cr2N and *g RT *g + M23C6 were reported to take place in N-containing and C-containing austenitic stainless steels, respectively. Additionally, the cellular precipitation of Cr2N was reported to cause a decrease in toughness for an aged 19Cr-5Mn-5Ni-0.2N-0.7 N steel. The purpose of this work was to study the kinetics of cellular precipitation for an isothermally aged 24Cr-15Ni-4Mn-0.03C-0.35N austenitic stainless steel.
ISSN:0022-2461
1573-4803
DOI:10.1023/B:JMSC.0000039281.89121.5d