BEHAVIOR OF THE METAL OF RAILS AND WHEELS IN THE CONTACT ZONE. EXPERIMENTAL STUDIES: 1) WORK - HARDENING SPEED WITH THE EMS 60 MACHINE (ADDITIONAL MEASUREMENTS), 2) RESIDUAL STRESSES IN HARD-GRADE STEEL RAILS (ADDITIONAL MEASUREMENTS) 3) CHECKING OF FATIGUE CRITERION PROPOSED BY MR. DANG VAN

This report is in three parts: 1) Work-hardening speed examined with the EMS 60 machine: The development of the two principal residual stresses produced on the running surface of rails made of different grades of steel has been studied as a function of the repeated passages of a loaded wheel. It has been shown that this development ceases at about approximately 1 million cycles. 2) Residual stresses in hard-grade steel: These stresses have been measured inside 2 rails of hard-grade steel, one new and the other work-hardened in service. The use of the rail in the track produces severe longitudinal and transverse compressive stresses at the surface. The stress field is affected strongly throughout the height of the rail-head. 3) Checking of fatigue criterion proposed by Mr. Dang Van: The fatigue limits of a rail steel have been determined for different cases of stressing. The results have enabled the validity of the fatigue criterion proposed by Mr. Dang Van (see Report C 53/RP 7) to be confirmed.

• Supplemental Notes:
  • Restrictions on the use of this document are contained in the explanatory material.
• Corporate Authors:

  International Union of Railways

  Office of Research and Experiments
  Utrecht,   Netherlands 
• Publication Date: 1973-10

Media Info

• Features: Figures; Tables;
• Pagination: 31 p.

Subject/Index Terms

• TRT Terms: Fatigue (Mechanics); Rail steel; Railroad rails; Steel
• Old TRIS Terms: Question c53; Rail metallurgy; Rail steel metallurgy
• Subject Areas: Materials; Railroads;

Filing Info

• Accession Number: 00052533
• Record Type: Publication
• Source Agency: International Union of Railways
• Report/Paper Numbers: C53/RP 8/E
• Files: TRIS
• Created Date: Jan 16 1976 12:00AM