Neutron diffraction investigation of residual stresses in transverse/oblique rail slices subjected to different grinding strategies

Technical Report · Sat May 01 04:00:00 UTC 1999

OSTI ID:6448661

Gnaeupel-Herold, T; Brand, P C; Prask, H J

Using the Double Axis system for Residual stress, Texture, and Single crystal analysis (DARTS) at NIST, neutron diffraction residual stress measurements were carried out in the head region of five pairs of transverse and oblique cut slices of railroad track, each having a thickness of 6.35 mm. The slices were taken from a 300 HB rail of CFI 136 RE size. All slices except one unworn reference piece had the same accumulated tonnage but were ground in different intervals. The measurements confirm the results previously found which indicated the existence of high sub-surface residual tensile stresses, while the regional close to the wheel-rail contact line shows high residual compressive stresses.

• Research Organization: National Inst. of Standards and Technology, Center for Neutron Research, Gaithersburg, MD (United States); Maryland Univ., Dept. of Materials and Nuclear Engineering, College Park, MD (United States)
• OSTI ID: 6448661
• Report Number(s): PB-99-147704/XAB; NISTIR--6305
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320202 -- Energy Conservation
Consumption
& Utilization-- Transportation-- Railway
36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
COHERENT SCATTERING
DIFFRACTION
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS TESTING
NEUTRON DIFFRACTION
NONDESTRUCTIVE TESTING
RAILWAYS
RESIDUAL STRESSES
SCATTERING
STEELS
STRESSES
TESTING