Thermo-mechanical fatigue behaviour of welded tubular parts made of ferritic stainless steel

Abstract : Car exhaust manifolds are critical components subjected to cyclic thermo-mechanical fatigue (TMF) during function. To reduce design costs, robust numerical design tools are required to assess their behaviour and lifetime. Manifolds are constructed by welding several ferritic stainless steel tubular parts together. TMF behaviour of a 1.4509 steel in welded and unwelded conditions is assessed under various loading conditions. Unified elasto-viscoplastic constitutive laws are developed. The specific thermo-mechanical behaviour of the heat-affected zone (HAZ) is also taken into account for welded steel. The reliability of the proposed models in predicting the mechanical response, in particular in the welded zone, is investigated. The local strains of the welded area are measured using a digital image correlation technique. Hence, several numerical models are implemented in ABAQUS and different areas are analysed to reproduce the mechanical behaviour of the heat-affected zone. Results are discussed and compared with experiments to validate the proposed model of the mechanical response of a welded component.
Complete list of metadatas

Cited literature [32 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-01398870
Contributor : Velay Vincent <>
Submitted on : Thursday, November 17, 2016 - 10:15:16 PM
Last modification on : Monday, April 29, 2019 - 3:28:29 PM
Long-term archiving on : Thursday, March 16, 2017 - 4:43:12 PM

File

articleIJF.pdf
Files produced by the author(s)

Identifiers

Citation

Marie-Cécile Robin, Denis Delagnes, Roland E. Logé, Pierre-Olivier Bouchard, Stéphanie Da Costa, et al.. Thermo-mechanical fatigue behaviour of welded tubular parts made of ferritic stainless steel. International Journal of Fatigue, Elsevier, 2013, 54, pp.84 - 98. ⟨10.1016/j.ijfatigue.2013.04.004⟩. ⟨hal-01398870⟩

Share

Metrics

Record views

813

Files downloads

217