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IMMC

Mélodie Mandy
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Funding: FRIA
Supervisor(s): Pascal Jacques

Used in the automotive industry, the hot stamping process ensures the steel to provide a high strength while allowing an easy shaping. During those high temperature operations, small amounts of hydrogen are absorbed by the material and can embrittle it if bad manufacturing and use conditions are applied. Currently, hydrogen embrittlement becomes a major issue as hydrogen susceptibility increases with steel strength. In this context, this work aims to understand the mechanisms which lead to an atmospheric hydrogen uptake in a given high strength steel in order to be able to avoid the entrance of hydrogen in the material. For this purpose, a specific methodology using deuterium, an hydrogen isotope, is developped and heat treatments under controlled atmospheres are related to their corresponding hydrogen/deuterium uptake measured by Thermal Desorption Analysis (TDA). Materials and atmospheres are also characterized.

IMMC main research direction(s):
Processing and characterisation of materials

Keywords:
hydrogen embrittlement
metallurgy

Research group(s): IMAP
Collaborations: Cédric Georges (CRM), CRM group, ArcelorMittal

  

Recent publications

See complete list of publications

Journal Articles


1. Mandy, Mélodie; Georges, Cédric; Sturel, T.; Drillet, P.; Jacques, Pascal. On the analysis of the simultaneous uptake and desorption of different isotopes of gaseous hydrogen by advanced high strength steels. In: Scripta Materialia, Vol. 161, p. 84-87 (2019). doi:10.1016/j.scriptamat.2018.09.034. http://hdl.handle.net/2078.1/204278


Conference Papers


1. Mandy, Mélodie. On the use of deuterium to characterize hydrogen uptake mechanisms in 22MnB5 bare steel. http://hdl.handle.net/2078.1/198700

2. Mandy, Mélodie; Georges, C.; Drillet, P.; Sturel, T.; Jacques, Pascal. Study of the hydrogen introduction in bare and Al-Si coated steels during the hot stamping process. http://hdl.handle.net/2078.1/183129

3. Mandy, Mélodie; Georges, C.; Drillet , P.; Sturel, T.; Jacques, Pascal. Study of the hydrogen introduction in bare and Al-Si coated steels during the hot stamping process. http://hdl.handle.net/2078.1/183127

4. Mandy, Mélodie; Georges, Cédric; Drillet, Pascal; Sturel, Thierry; Jacques, Pascal. On the interaction mechanisms between atmospheric sources of hydrogen and Al-Si coated or bare high strength steels during the hot stamping process. http://hdl.handle.net/2078.1/170121

5. Mandy, Mélodie; Georges, Cédric; Drillet, Pascal; Sturel, Thierry; Jacques, Pascal. On the interaction mechanisms between sources of hydrogen and Al-Si coated or bare high strength steels during the hot stamping process. http://hdl.handle.net/2078.1/170122

6. Mandy, Mélodie; Jacques, Pascal; Georges, Cédric. Etude des mécanismes d'interaction, au cours du procédé d'emboutissage à chaud, entre les surces atmosphériques d'hydrogène et les aciers à haute résistance revêtus d'Al-Si. http://hdl.handle.net/2078.1/170120


Dissertations


1. Mandy, Mélodie. On the interactions between atmospheric hydrogen sources and 22MnB5 steel, prom. : Jacques, Pascal, 11/02/2019. http://hdl.handle.net/2078.1/214192