Institute of Physics of Materials AS CR, v. v. i. > Projects > Carbon diffusion in carbon-supersaturated ferrite and austenite steels
Carbon diffusion in carbon-supersaturated ferrite and austenite steels
| Number of Project | P108/11/0148 |
| Agency | Grantová agentura České republiky |
| Duration | 2010-12-31 - 2013-12-30 |
Anotace |
| We propose to study the rate of carbon diffusion in carbon-supersaturated BCC and FCC phases of chosen Fe and Ni based alloys. The carbon supersaturation may be produced, e.g., as a result of a phase transformation of advanced materials or under a great concentration gradient in protective surface layer. Contrary to the fact that carbon diffusion coefficient is relatively high the mean diffusion path of carbon diffusion during the material production and/or during the projected service of the construction component may be very short due to low temperature. It means that carbon supersaturation is kept during the whole service time of the material. With respect to such conditions, it is desirable to know carbon diffusion coefficient in carbon-supersaturated matrices, which enables (i) to estimate the residual lifetime of the material and (ii) to design new types of material. The principal experimental method is very fine SIMS depth profiling. The results of the proposed study will elucidate kinetics of the process and/or sability of carbon-supersaturated materials. |
