| | The nondestructive testing processes used currently in railways are ultrasonic flaw detection for rails and axle shafts; magnetic powder fluoroscopy for axles, wheels, vehicle parts such as gears and armature shafts; impregnating flaw detection for switches, rails, and gear boxes, etc. The eddy-current test is not used now because of having no definite evaluating standard. The limitation site operation makes radioactive ray inspection impermissible. Applications of nondestructive testing to bogies, rails, and tram wires are detailed. The present issues and their solutions are discussed, and the future prospected. |
