| Title |
A Study on the Determination of Diffusion Coefficient of Carbon in 304 austenitic Stainless Steels by the Internal Friction Method |
| Authors |
김경식(Kyung Sik Kim); 김동훈(Tong Hoon Kim) |
| Abstract |
Internal friction peaks associated with the presence of carbon in 18-8 type 304 stainless steel have been observed from measurements with a torsion pendulum. The temperature for maximum internal friction lies between 250℃ and 300℃ with a frequency of vibration. The height of the peak rises and the position of the peak shifts to a lower temperature with an increase of the carbon content. And a comparison of the activation energy and the diffusion coefficient determined by internal friction methods with those measured in conventional macro-diffusion experiments reveals that the diffusion data measured by internal friction method and the diffusion data measured by conventional method exist in the same line. It follows from the above fact that observed internal friction peak is associated with the stress-induced diffusion of carbon in face-centered cubic alloys. |