The Effects of Surface Treatment on Torsional Fatigue Failure in Recoil Springs

Abstract

Two different steels, AISI 4150H and maraging 250, were tested in torsional fatigue to failure. Both materials were prepared with three surface conditions: (1) as-machined (machining grooves left on the outside surface); (2) as-polished; and (3) polished and shot peened. All specimens converge at low cycle life (about 1,000 cycles), but at lower torsional stresses, the greatest improvement in fatigue life is shown by the shot peened specimens, followed by the as-polished specimens. This is true for both materials. The 4150H steel shows the greatest fatigue lives on the torsional S-N curves, but the maraging 250 displays the greatest degree of improvement throughout the range of surface conditions.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1992
Accession Number
ADA259345

Entities

People

  • C J. Nolan
  • J. A. Kapp
  • R. R. Fujczak

Organizations

  • United States Army Armament Research, Development and Engineering Center

Tags

Communities of Interest

  • Air Platforms
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Air Cooled
  • Engineering
  • Failure Mode And Effect Analysis
  • Fatigue Life
  • Fatigue Tests (Mechanics)
  • Finishes
  • Materials
  • Materials Science
  • Mechanical Properties
  • Mechanics
  • Military Research
  • Residual Stress
  • Shot Peening
  • Surface Finishing
  • Surface Properties
  • Tensile Strength

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).
  • Metallurgy
  • Pavement Materials Engineering.