A numerical method for determining the kinetic constants of gas–liquid metal interactions in N–Ni–20Cr and N–ASTM F-75 alloy systems
✍ Scribed by Héctor Mancha; Martı́n Herrera; Juan Méndez; Denis Ablitzer; Manuel Méndez
- Publisher
- Elsevier Science
- Year
- 1998
- Weight
- 151 KB
- Volume
- 19
- Category
- Article
- ISSN
- 0261-3069
No coin nor oath required. For personal study only.
✦ Synopsis
In gas᎐liquid interaction systems, under non-equilibrium degassing conditions, the rate of a particular process often follows a mixed control regime where serial-acting mechanisms affect the global rate of the process and, therefore, the determination of real kinetic constants is difficult. In this paper a numerical method for determining these kinetic constants is presented and applied to the cases of denitrogenation of liquid Ni᎐20Cr alloys at 1873 K and nitrogen absorption in liquid ASTM F-75 alloys at 1773 and 1823 K. The results showed that interaction kinetics of nitrogen with both alloys was limited by both first and second order mechanisms. This results permit manufacturing engineers to act on the process parameters in order to obtain the nitrogen content that allows the best performance of mechanical parts.