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Study of the low cyclic behaviour of the IRIS alloy at high temperature

Naanani, Soumaya and Hantcherli, Muriel and Hor, Anis and Mabru, Catherine and Monchoux, Jean-Philippe and Couret, Alain Study of the low cyclic behaviour of the IRIS alloy at high temperature. (2018) In: 12th International Fatigue Congress (FATIGUE 2018), 27 May 2018 - 1 June 2018 (Poitiers, France).

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Official URL: https://doi.org/10.1051/matecconf/201816506007

Abstract

This paper presents experimental results on low cycle fatigue(LCF) behaviour at high temperatures of the IRIS alloy(Ti-Al48-W2-B0.08,at. %) densified by Spark Plasma Sintering (SPS). Cyclic stability isnoticed, whatever the temperature and the total strain amplitude. Fracture occurs by mixed interlamellar and translamellar modes. Transmission electron microscopy (TEM) observations reveal that deformation is mainly due to ordinary dislocations and twins, and slip and cross-slip mechanisms have been clearly evidenced, without significant contribution of climb at 800°C. It hasalsobeen established that dislocation density depends on fatigue life time rather than on stress amplitude.

Item Type:Conference or Workshop Item (Paper)
Additional Information:vol. 165
HAL Id:hal-01914193
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Ecole nationale supérieure des Mines d'Albi-Carmaux - IMT Mines Albi (FRANCE)
Université de Toulouse > Institut National des Sciences Appliquées de Toulouse - INSA (FRANCE)
Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
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Deposited By: Catherine Mabru
Deposited On:06 Nov 2018 16:17

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