CAUSES OF SHELLY SPOTS AND HEAD CHECKS IN RAIL- METHODS FOR THEIR PREVENTION
A summary of the performance of heat-treated rail in two test installations was presented. Progress on shelly rail studies at the University of Illinois was presented in appendix 10-a. Rolling-load tests of heat-treated rails, flame-hardened rails, alloy rails and headfree rails were performed. Laboratory examination of detail fractures from shelling was performed. Design and construction of a new cradle-type rolling machine was discussed. A description of the technique used to produce electron micrographs at 35,000X magnification was given. Rolling load tests continued on 132-lb heat-treated rail revealed that yield strength was increased 65 percent, tensile strength 31 percent, elongation 18 percent, reduction of area 100 percent, and endurance limit 40 percent. Results of rolling-load tests on seven rails flame-hardened different amounts on the rail treads showed four specimens failed by head and web separation cracks, and three failed by shelling. Rolling-load and physical tests on two specimens of alloy rail steel showed that these rails have physical properties which compare closely with those of heat-treated rails. Examinations of seven detail fractures from shelling revealed that the shelling cracks started longitudinally in the steel and then turned into transverse detailed fractures.
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Corporate Authors:
American Railway Engineering Association
59 East Van Buren Street
Chicago, IL United States 60605 - Publication Date: 1951
Media Info
- Features: Appendices; Photos; Tables;
- Pagination: p. 661-679
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Serial:
- AREA BULLETIN
- Volume: 52
- Publisher: American Railway Engineering Association
Subject/Index Terms
- TRT Terms: Alloy steel; Heat treated rail; Load tests; Railroad rails; Shelling (Metals)
- Old TRIS Terms: Flame hardened rail; Rail shelling
- Subject Areas: Materials; Railroads;
Filing Info
- Accession Number: 00052440
- Record Type: Publication
- Source Agency: Association of American Railroads
- Report/Paper Numbers: Proceeding
- Files: TRIS
- Created Date: Jul 15 1976 12:00AM