DYNAMIC SUBCRITICAL CRACK GROWTH PROPERTIES OF DUPLEX ANNEALED TI-8AL-1MO-1V AND MILL ANNEALED TI-6AL-4V IN AN AIR AND CORROSIVE ENVIRONMENT

Abstract

This program was conducted to determine the dynamic (fatigue) crack growth properties of two titanium alloys (Ti-8Al-1Mo-1V Duplex Annealed and Ti-6Al-4V Mill Annealed) at room temperature in an air and in a 3.5 percent NaCl environment. Dynamic crack growth versus cycles to failure was determined at two loading frequencies (40 cpm and 2 cpm) for the corrosive environment and at a 40 cpm loading frequency for the air environment. A comparison of the air and corrosive environment test data at the 40 cpm loading frequency shows a reduction in cyclic life when exposed to the 3.5 percent NaCl environment. Also a comparison of the corrosive environment test data at loading frequencies of 40 cpm and 2 cpm shows a reduction in cyclic life on both a time and a number of cycles to failure basis at the higher loading frequency.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1967
Accession Number
AD0814825

Entities

People

  • Gerald J. Petrak

Organizations

  • University of Dayton

Tags

DTIC Thesaurus Topics

  • Air Force
  • Alloys
  • Contractors
  • Environment
  • Frequency
  • Materials
  • Materials Laboratories
  • Titanium
  • Titanium Alloys

Fields of Study

  • Materials science

Readers

  • Logistics and Supply Chain Management.
  • Materials Science (Mechanical Engineering).
  • Materials Science and Engineering.