Improvement in the Fatigue Behavior of Tank Track Pins
Abstract
This investigation is aimed at improving the fatigue behavior of tank track pins through the use of better processing methods and materials. Five different compositions of steels investigated: SAE 865OH, 4340, 4140, 8620 and 1045. These were subjected to the following treatments: induction hardening, stress shot peening, nitriding and carburizing. All steels except 1045, received final treatment of shot peening. Tension-tension bending fatigue tests were conducted on these pins to determine the S-N curve of each type of steel and the result compared with the data on the regular production tank tack pins obtained in another investigation. Stress shot peened 865OH pins have the highest residual compressive stress of -175 ksi on the surface and demonstrate the best fatigue limit of 198 ksi. The induction hardened, nitrided and carburized 4340, 4140, and 8620 steel pins, which have been shot peened, have a surface hardness range of Rc 58 -62 and shown an equal level of compressive residual stress of about -110 ksi on the surface. Carburized 8620 pins demonstrate the second highest fatigue limit of 175 ksi followed in turn by induction hardened and stress shot peened 4340, induction hardened and nitrided 4140 and carburized 1045 with the lowest fatigue strength.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1985
- Accession Number
- ADA157616
Entities
People
- A. M. Said
- J. F. Wallace
Organizations
- Case Western Reserve University