IMPROVEMENT IN FATIGUE RESISTANCE OBTAINED BY WATER QUENCHING UNTREATED 5-1/2" TIMES 10" PASSENGER AND FREIGHT CAR AXLES FROM 1000 DEGREES F

Fatigue tests were made on eleven passenger car axle assemblies and seven freight car axle assemblies prepared from axle forgings which had been modified by water quenching from 1000 degrees F. These forgings were originally produced to AAR Spec. M-101-49, Grade A, but were given this subsequent treatment to determine the improvement in fatigue resistance that could be obtained from the beneficial thermal residual stresses produced by quenching from below the critical. It was concluded that water quenching untreated axle forgings does not improve the resistance to initiation of fatigue cracks in the wheel fit portion, but does greatly increase the resistance to breaking off in the wheel fit. In some cases over 100%.

  • Corporate Authors:

    Association of American Railroads

    3140 South Federal Street
    Chicago, IL  USA  60605
  • Authors:
    • Horger, O J
    • Neifert, H R
  • Publication Date: 1953-12

Media Info

  • Features: Figures; Photos; Tables;
  • Pagination: 28 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00040360
  • Record Type: Publication
  • Report/Paper Numbers: MR-213 Res Rpt
  • Files: TRIS
  • Created Date: Jul 8 1994 12:00AM