Affiliation:
1. ABDULLAH GUL UNIVERSITY
Abstract
In this study, hydrogen diffusion profiles of different metallic materials were investigated. To model hydrogen diffusion, 1D and 2D mass diffusion models were prepared in MATLAB. Iron, nickel and titanium were selected as a material of choice to represent body-centered cubic, face-centered cubic, and hexagonal closed paced crystal structures, respectively. In addition, hydrogen back diffusion profiles were also modeled after certain baking times. Current results reveal that hydrogen diffusion depth depends on the microstructure, energy barrier model, temperature, and charging time. In addition, baking can help for back diffusion of hydrogen and can be utilized as hydrogen embrittlement prevention method. Since hydrogen diffusion is very crucial step to understand and evaluate hydrogen embrittlement, current set of results constitutes an important guideline for hydrogen diffusion calculations and ideal baking time for hydrogen back diffusion for different materials. Furthermore, these results can be used to evaluate hydrogen content inside the material over expensive and hard to find experimental facilities such as, thermal desorption spectroscopy.
Publisher
Gazi University Journal of Science
Subject
Multidisciplinary,General Engineering
Reference31 articles.
1. [1] Liang, Y. and Sofronis, P., “Toward a phenomenological description of hydrogen-induced decohesion at particle/matrix interfaces”, Journal of the Mechanics and Physics of Solids, 51: 1509–1531, (2003).
2. [2] Tiwari, G. P., Bose, A., Chakravartty, J. K., Wadekar, S. L., and Totlani, M. K., “A study of internal hydrogen embrittlement of steels”, Materials Science and Engineering A, 286: 269–281, (2000).
3. [3] Bal, B., Sahin, I., Uzun, A., and Canadinc, D., “A New Venue Toward Predicting the Role of Hydrogen Embrittlement on Metallic Materials”, Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, 47: 5409–5422, (2016).
4. [4] Birnbaum, H. K. and Sofronis, P., “Hydrogen-enhanced localized plasticity-a mechanism for hydrogen-related fracture,” Materials Science and Engineering A, 176: 191–202, (1994).
5. [5] Gerberich, W. W., Stauffer, D. D., and Sofronis, P., “A coexistent view of hydrogen effects on mechanical behavior of crystals: HELP and HEDE”, International Hydrogen Conference - Effects of Hydrogen on Materials, 38–45 (2009).