Monotonic and Low-Cycle Fatigue Response of a Maraging Steel and Metastable beta Titanium Alloy under Torsional Loading

Abstract

This study deals with the torsional response of Ti-8823 and 18Ni (200) maraging steel. The effect of different heat treatments and the subsequent change in microstructure are investigated. In the case of the Ti-8823, a comparison was made between the solution-treated-and-aged condition, and the direct-aged condition. It was found that the finer precipitate morphology in the DA material offered a greater resistance to torsional fatigue. For the 18Ni (200) maraging steel, an increase of aging time from 3 to 98 hours led to a substantial increase in the amount of reverted austenite, which in turn led to a significant improvement in torsional fatigue behavior. The results are analyzed in terms of the Manson-Coffin equation.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1977
Accession Number
ADA038837

Entities

People

  • Peter T. Lum
  • Richard Chait

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Ductility
  • Heat Treatment
  • Hot Working
  • Information Processing
  • Materials
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Military Research
  • Shear Stresses
  • Strain Hardening
  • Stress Strain Relations
  • Stresses
  • Tensile Properties
  • Tensile Strength
  • Titanium
  • Titanium Alloys

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Mechanical Engineering/Mechanics of Materials.