Influence of strain hardening on gaseous nitriding of steels
Communication avec acte
Date
2016Abstract
Machining is known to introduce plastic straining and residual stress gradients in surface of mechanical parts. If not controlled, the mechanical state of a surface can influence adsorption and diffusion of atoms during subsequent chemical surface treatments, such as nitriding. In the present work, the influence of strain hardening on gaseous nitriding of steels is studied. The nitriding process was carried out using a laboratory set-up enabling the control of nitriding parameters (time, temperature, nitriding potential) on 33CrMoV12-9 steel samples. Homogeneously strain hardened samples are obtained by controlled tensile tests, enabling to nitride samples at different levels of strengthening. Results are compared to a reference state, obtained from tensile specimen not submitted to strain-hardening, as well as an industrially representative sample nitrided using the same conditions. Nitrided samples are characterized by SEM observations, hardness measurements and carbon and nitrogen in-depth concentration profiles.
Files in this item
- Name:
- B.Guillot-Influence_of_strain_ ...
- Size:
- 722.2Kb
- Format:
- Description:
- Proceeding
Related items
Showing items related by title, author, creator and subject.
-
Communication avec acteJÉGOU, Sébastien; GUILLOT, Benjamin; BARRALLIER, Laurent (2016)Gaseous nitriding is a well-established thermochemical treatment of carbon iron-based alloys that considerably enhances corrosion, wear and fatigue resistances of critical mechanical parts such as crank shafts and bearings. ...
-
Article dans une revue avec comité de lectureGUILLOT, B.; JEGOU, Sébastien; BARRALLIER, Laurent (Elsevier, 2017)The present work focuses on the industrial inhibition of gaseous nitrided parts and on the industrial in-situ pre-treatment that can be used to avoid these inhibitions. The first objective is to obtain a repeatable defective ...
-
Communication avec acteMUBARAK, Hazem; JEGOU, Sébastien; BARRALLIER, Laurent; VOLOVITCH, Polina; OGLE, Kévin (2015)In this study, Stress Corrosion Cracking (SCC) produced for 304L austenitic stainless steel in different concentrations of chloride containing sulfuric acid solutions was analyzed using both Scanning Electron Microscope ...
-
Article dans une revue avec comité de lectureWEIL, Hadrien; JEGOU, Sébastien; BARRALLIER, Laurent; COURLEUX, Alice; BECK, Guillaume (Università di Cassino, 2016)The present study aims to develop an algorithm able to predict the fatigue lifetime of nitrided steels. Linear multi-axial fatigue criteria are used to take into account the gradients of mechanical properties provided by ...
-
Article dans une revue avec comité de lectureTHIBAULT, Simon; SIDOROFF, Christine; JÉGOU, Sébastien; BARRALLIER, Laurent; MICHEL, Grégory (Hanser, 2018)Nitriding of low-alloy steels is widely used for gears and bear- ings in aerospace industry. Some highly stressed surfaces re- quire high nitrided depth, which involves long time/high tem- perature nitriding treatment. ...