Improvement of Helicopter Forgings by Controlled Solidification and Thermal-Mechanical Treatments.

Abstract

A four-task program was conducted to provide information for the development of industrial techniques for producing improved aluminum forgings. These techniques, involving intermediate thermal-mechanical treatment (ITMT) of ingot, were evaluated on the basis of microstructure, mechanical properties, fracture and fatigue properties, and resistance to stress corrosion. The results showed that ITMT forgings have equivalent tensile properties and stress corrosion resistance and at least 20% better fracture toughness and fatigue properties when compared to conventional 7075-T73 forgings. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1976
Accession Number
ADA031357

Entities

People

  • Joseph C. Zola

Organizations

  • Boeing Rotorcraft Systems

Tags

Communities of Interest

  • Air Platforms
  • Human Systems

DTIC Thesaurus Topics

  • Aircrafts
  • Airframes
  • Fatigue Tests (Mechanics)
  • Manufacturing
  • Materials
  • Materials Engineering
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Plastic Explosives
  • Stress Corrosion
  • Stress Corrosion Cracking
  • Stress Intensity Factors
  • Tensile Properties
  • Tensile Strength
  • Test And Evaluation
  • Test Methods

Fields of Study

  • Materials science

Readers

  • Metallurgy