A Simple Model for Hardness and Residual Stress Profiles Prediction for Low-Alloy Nitrided Steel, Based on Nitriding-Induced Tempering Effects
Article dans une revue avec comité de lecture
Date
2018Journal
Journal of heat treatment and materialsAbstract
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. This study focused on identifying process parameter effects on hardness and residual stress pro- files in a large range of nitriding time and temperature. We demonstrate that core and case can be considered as two ma- terials, softening of which can be predicted by two tempering laws. In addition, a basic relationship was derived from the nitriding depth and a pseudo-diffusion coefficient, allowing prediction of the hardness profile. Residual stress results show that the diffusion controlled effect can also be used to predict residual stress profile affected depth. Likewise, the tempering controlled effect can be used to predict surface and maximum values of the residual stress profile.
Files in this item
Related items
Showing items related by title, author, creator and subject.
-
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 ...
-
Communication avec acteJEGOU, Sébastien; BARRALLIER, Laurent; FALLOT, Guillaume (ASM International, 2016)Gaseous nitriding is controlled by temperature, time and surface nitrogen potential. Tuning these parameters lead to the expected mechanical properties (hardness, residual stresses) and durability of treated mechanical ...
-
Communication avec acteWEIL, Hadrien; JEGOU, Sébastien; BARRALLIER, Laurent; COURLEUX, Alice; BECK, Guillaume (2015)Le but de cette étude est de mettre en place un modèle de calcul en fatigue prenant en compte les caractéristiques mécaniques d’un matériau nitruré. Le travail est réalisé sur acier de nuance 32CrMoV13 utilisé dans la ...
-
Communication avec acteGUILLOT, Benjamin; JEGOU, Sébastien; BARRALLIER, Laurent (ASM International, 2016)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 ...