SST Technology Follow-on Program-Phase 2. Development of Improved Titanium 6A1-4V Alloy Mill Products

Abstract

In the SST prototype program, wide variations in mechanical and fracture properties of Ti-6Al-4V mill products were found. During DOT/SST Phase I follow-on work, these variations were shown to be related to composition, crystallographic texture, and microstructure. The Phase II follow-on program applied this technology as a basis to develop new material specifications for high toughness Ti-6Al-4V material. Specifications were prepared for sheet, plate, extrusions, bar, and forgings. The specifications emphasized tighter controls on composition, crystallographic texture, and microstructure, as well as minimum requirements for stress corrosion resistance. Verification testing was conducted on mill products procured to the requirements of the new specifications. The materials exhibited excellent fracture characteristics, with slight loss in tensile strength. Minor modifications to the specifications were incorporated as a result of verification test data.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1974
Accession Number
AD0920802

Entities

People

  • D. T. Lovell
  • W. F. Spurr

Organizations

  • Boeing

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Acceptability
  • Aircraft Equipment
  • Aircrafts
  • Heat Treatment
  • Materials
  • Measurement
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Modulus Of Elasticity
  • Plastic Explosives
  • Stress Corrosion Cracking
  • Tensile Properties
  • Tensile Strength
  • Tensile Testing
  • Test And Evaluation
  • Test Methods

Fields of Study

  • Materials science

Readers

  • Metallurgy
  • Powder metallurgy of Titanium alloys.
  • Software Engineering