Track Pin Induced Stress
Abstract
Work reported was for the period 1 Oct 1977 to 30 September 1978. The objective was twofold: a) To follow track pin residual stress history over the last few processing steps such as core hardening, induction hardening, straightening, grinding, and shot peening; b) To examine the data for evidence of harmful levels or patterns of residual stress that may contribute to track pin failure. A total of 100 track pins were randomly selected from the last seven stages of manufacture at the manufacturer's plant. Residual stress measurements were made in both the longitudinal direction and hoop/transverse direction at 72 spots on each pin. Equipment used was automated x-ray diffraction equipment. Results of the measurements from each pin were tabulated in terms of mean and standard deviation of readings on each pin. Of particular interest to TARADCOM were: 1) Hoop stresses 30K psi less compressive than the longitudinal stresses measured at the same point were generated in the centerless grinding operation, 2) The 30K psi difference in readings is not removed in the stress relief operation, and 3) It is possible to remove the 30K psi difference by shot peening.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1979
- Accession Number
- ADA072449
Entities
People
- S. T. Allen
- Salvatore B. Catalano
Organizations
- United States Army Tank Automotive Research, Development and Engineering Center