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Article Dans Une Revue Materialia Année : 2020

Effect of cold rolling on phase separation in 2202 lean duplex stainless steel

Résumé

The effect of plastic deformation (cold rolling) on the thermal aging of a lean 2202 duplex stainless steel at intermediate temperatures (280 °C-450 °C) was studied using a combination of atom probe tomography and thermoelectric power measurements. In the undeformed condition, spinodal decomposition of ferrite was shown to be the prime aging process with an activation energy of 206 kJ/mol. Plastic deformation enhanced the aging and the austenite partly transformed into martensite. When no precipitation or phase transformation was observed in austenite, both ferrite and martensite decomposed. The spinodal decomposition kinetics of ferrite increased with increasing deformation rate. The FeCr-rich martensite also decomposed at 450 °C, via a nucleation and growth process, owing to a decrease of the Cr content in the matrix. Chromium nitrides, G-Phase, and Cu-rich precipitates were observed in the decomposed martensite.
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141 Materialia 14 (2020) 100854 S. Cazottes, V. Massardier, R. Danoix, D. Rolland, C. Cisse, F. Danoix, Effect of cold rolling on phase separation in 2202 lean duplex stainless steel.pdf (5.28 Mo) Télécharger le fichier
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Dates et versions

hal-03365455 , version 1 (05-10-2021)

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S. Cazottes, V. Massardier, Raphaële Danoix, D. Rolland, S. Cissé, et al.. Effect of cold rolling on phase separation in 2202 lean duplex stainless steel. Materialia, 2020, 14, pp.100854. ⟨10.1016/j.mtla.2020.100854⟩. ⟨hal-03365455⟩
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