Observation on the growth behavior of small surface cracks using remote measurement system
- Korea Research Institute of Standards and Science, Taejon (Korea, Republic of)
- Kyungpook National Univ., Taegu (Korea, Republic of)
A new experimental system which uses a remote measurement system (RMS) constructed by means of an image processing technique was applied to the observation of small surface fatigue crack behavior in 1Cr-1Mo-0.25V steel and type 304 stainless steel at room temperature as well as at elevated temperature. This system consists of a long distance focusing microscope, a CCD camera, a light source, a 3-axis controller, a personal computer and a data translation card. The resolution of this system is 1.1 {mu}m. This system allows one to observe the surface crack length down to 30{mu}m. Using this system, the growth rates of small surface cracks on smooth specimens were studied in terms of stress intensity factor range and compared with those of long cracks. 17 refs., 10 figs., 4 tabs.
- OSTI ID:
- 577630
- Report Number(s):
- CONF-960580--
- Country of Publication:
- United States
- Language:
- English
Similar Records
Transients in elevated temperature crack growth. [1 Cr-1Mo-0. 25V]
Characterization of creep-fatigue fracture of Type 304 stainless steel based on initiation and growth of small cracks