Numerical and Experimental Study on the Residual Stresses in the Nitrided Steel
Huang, Yi Zhong
Date of Issue2016
School of Materials Science and Engineering
In the present work, residual stresses distribution in the gas nitrided AISI 4140 sample has been studied using finite element (FE) simulation. The nitrogen concentration profile is obtained from the diffusion-controlled compound layer growth model, and nitrogen concentration controls the material volume change through phase transformation and lattice interstitials which results in residual stresses. Such model is validated through residual stress measurement technique—micro-ring-core method, which is applied to the nitriding process to obtain the residual stresses profiles in both the compound and diffusion layer. The numerical and experimental results are in good agreement with each other; they both indicate significant stress variation in the compound layer, which was not captured in previous research works due to the resolution limit of the traditional methods.
Journal of Materials Engineering and Performance
© 2016 ASM International. This paper was published in Journal of Materials Engineering and Performance and is made available as an electronic reprint (preprint) with permission of ASM International. The published version is available at: [http://dx.doi.org/10.1007/s11665-016-2236-8]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.