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Communication dans un congrès

Impact of a heat treatment on the microstructure and the low cycle fatigue properties of a 9Ni steel

Abstract : The objective of the present paper is to investigate if the presence and the nature of austenite in 9Ni steel, together with the modification of the matrix induced by heat treatment, change the low cycle fatigue response. The steel was therefore heat-treated so that either a quenched martensitic matrix or a mixture of tempered martensitic with bainitic matrix containing retained or reversed austenite would be obtained, respectively. The experiments showed that while higher stress levels were observed during low cycle fatigue, the quenched microstructure presented a lower fatigue performance under the same applied strain. According to the slip marks pattern, the tempered steel exhibited a higher degree of cyclic deformation accommodation. No obvious effect of austenite in terms of the TRIP effect has been evidenced and the matrix appeared to play a more important role in the fatigue performance. This investigation suggests another possible role of austenite.
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Communication dans un congrès
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https://hal.univ-lille.fr/hal-03476819
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Soumis le : lundi 13 décembre 2021 - 11:00:24
Dernière modification le : jeudi 24 mars 2022 - 03:43:38
Archivage à long terme le : : lundi 14 mars 2022 - 18:44:03

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Mahira-Adna Cota Araujo, Jean-Bernard Vogt, Jeremie Bouquerel. Impact of a heat treatment on the microstructure and the low cycle fatigue properties of a 9Ni steel. 30th Anniversary International Conference on Metallurgy and Materials, Tanger, May 2021, Prague, Czech Republic. ⟨10.37904/metal.2021.4130⟩. ⟨hal-03476819⟩

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