Condition Monitoring of H e avy-Axl e Load Rail c ar Stru
1 Railroad Engineering Program, Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Newmark Civil Engineering Laboratory 205 N. Mathews Ave., Urbana IL, 61801 USA 2 School of EECS, Oregon State University, Kelly Engineering Center, Corvallis OR, 97331 USA 3 Department of E lectrical and Computer Engineering, Computer Vision and Robotics Laboratory, University of Illinois at Urbana-Champaign, Beckman Institute for Advanced Science and Technology, 405 N. Mathews Ave., Urbana IL, 61801 USA
A Machine Vision System for Monitoring Railcar Health : Preliminary Results by
One machine vision system researched by the University of Illinois Urbana-Champaign (UIUC), under sponsorship of the AAR’s Technology Scanning Strategic Research Initiative, has demonstrated that machine vision can be used for inspection of railcars. The UIUC prototype system inspect wheel, truck, and brake system components by automated, machine vision-based systems. Machine visionbased wheel and brake shoe inspection systems are already or will soon become commercially available. Inspection of other truck components will soon follow. This further work by UIUC will focus on other aspects of car inspection, particularly in the area of safety appliances.
The role of dissolved oxygen in supercritical water in the oxidation of ferritic–martensitic steel
Abstract To assess the role of dissolved oxygen in supercritical water on the growth processes of oxide scales, a marker experiment of ferritic–martensitic steel was performed by exposing to supercritical water (H 2 16 O) containing marked 18 O 2 at 600 °C under 25 MPa. The oxide scale was analysed by using Secondary Ion Mass Spectrometry (SIMS). The oxygen isotope profile shows that dissolved oxygen and supercritical water react with metals simultaneously. Dissolved oxygen changes the oxidation/reduction potential of supercritical water leading to an increase in the oxidation rate. The oxidation rate increases with increase in dissolved oxygen content in supercritical water. The mechanism of the effect of dissolved oxygen on oxidation is discussed.