Controlling residual stress is critical in continuous welded rail (CWR) welding procedures because uncontrolled residual stress can lead to track buckling in hot weather or rail breaks in cold weather. Continuous welded rail is created by welding together sections of rail, often hundreds of feet long, to eliminate joints. These joints are sources of weakness and require frequent maintenance. However, the welding process introduces residual stresses into the rail. Residual stresses are stresses that remai....
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