The Boundary Element Method was used to investigate hydrogen diffusion problems with varying initial and boundary conditions. These calculations simulated the effects of: (a) hydrogen content within metals; and (b) environmental hydrogen, on the hydrogen concentration near a crack tip, and predicted the hydrogen concentration distribution as a function of time. While the hydrogen diffusion behavior and hydrogen distribution curves depended upon initial and boundary conditions, in all cases, hydrogen was found to aggregate near the crack tip and a peak value of hydrogen concentration was observed in front of the crack tip. The hydrogen concentration near the crack tip was found to be proportional to the initial hydrogen content within the metal when C|t=0= C0 and ∂C/∂|r = 0 , and to the hydrogen concentration in the environment when C|t=0= 0 and C|r = Cb.
|Original language||English (US)|
|Number of pages||5|
|Journal||American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP|
|State||Published - Dec 1 1996|
All Science Journal Classification (ASJC) codes
- Mechanical Engineering