Near-surface residual stresses for parent rail and flash-butt weld sections of Algoma Intermediate Alloy rail and NSC DHH-370S premium rail were determined using the blind-hole-drilling method (ASTM E837-85). Plane strain fracture toughness values, corresponding to different web and flange toe cracking conditions, were determined for the test rails using ASTM E399-83. Fracture mechanics was then employed to compare critical web and toe crack sizes for the various parent rails and welds, for expected maximum load situations. Flash-butt welds are most susceptible to horizontal web failures, due largely to high tensile residual stresses following welding.
Near-surface residual stresses for rail steels and flash-butt welds
Oberflächennahe Eigenspannungen in Schienenstählen und Stumpfschweißungen
1993
10 Seiten, 9 Bilder, 15 Tabellen, 13 Quellen
Conference paper
English
Residual stresses in flash butt welded rail
Tema Archive | 2011
|Mode II fatigue failures at rail butt-welds
Tema Archive | 2005
|Efficient mobile flash-butt rail welding
Online Contents | 1994
Mechanisms of mixed mode fatigue crack propagation at rail butt-welds
Tema Archive | 2006
|Southern butt-welds rails in track
Engineering Index Backfile | 1939