FRACTURE TOUGHNESS, FATIGUE AND CORROSION CHARACTERISTICS OF HIGH STRENGTH ALUMINUM EXTRUSIONS AND PLATE.

Abstract

The fracture toughness tests of all materials have been completed, and test results are reported. Axial-stress fatigue curves have been prepared for the 1/2 and 1-3/8-in. X7080-T7E41 plate, the 1/2-in. 7178-T651 plate, and the 11/16x16-in. 7075-T6510, 7075-T73510, X7080-T7E42 and 7178-T6510 extruded panels. The results of some stress-corrosion tests of the plates and extruded shapes are reported. The X7080-T7-type samples exhibit a higher resistance to stress-corrosion cracking than the 7178-T6-type samples. Tests to evaluate the stress-corrosion resistance of the extruded bar samples by a fracture mechanics approach have begun. Fatigue crack propagation curves have been prepared for the four samples of 7178 plate and extruded shapes. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1968
Accession Number
AD0840349

Entities

People

  • B. W. Lifka
  • Glenn E. Nordmark
  • J. G. Kaufman
  • P. E. Schilling

Organizations

  • Alcoa

Tags

DTIC Thesaurus Topics

  • Corrosion
  • Corrosion Resistance
  • Crack Propagation
  • Cracks
  • Fracture (Mechanics)
  • Material Degradation Processes
  • Materials
  • Mechanical Phenomena
  • Mechanical Properties
  • Mechanics
  • Resistance
  • Stress Corrosion
  • Stress Corrosion Cracking
  • Toughness

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).
  • Polymer Science and Engineering.
  • Structural Dynamics.