156-INCH DIAMETER MARAGING STEEL CASE HYDROBURST AND MATERIALS EVALUATION

Abstract

The program encompassed discontinuity stress analysis of the large, welded vessel, an evaluation of ultrasonic inspection methods by post-test sectioning, and a detailed failure analysis. At 800 psi, 85 percent of the planned cyclic pressure level, the nozzle adapter-to-case bolts failed; secondary origins were found in the pin joint and the nozzle adapter forging. Concurrent examinations of the previously used bolts by LPC, Mellon Institute, and SPS Laboratories agreed in findings of evidence of stress corrosion in the 260,000-psi strength level H-11 bolts. The discontinuity stress analysis showed a forty percent indicated stress riser around the longitudinal welds caused by sea-gulling contour deviations.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1967
Accession Number
AD0813906

Entities

People

  • George Broeker
  • Gilbert Skopp
  • J. S. Coverdale
  • Norbert Wells

Organizations

  • Lockheed Propulsion Company

Tags

Communities of Interest

  • Air Platforms
  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Computers
  • Geometry
  • Hydrogen Embrittlement
  • Material Degradation Processes
  • Materials
  • Materials Testing
  • Measurement
  • Mechanical Working
  • Mechanics
  • Stress Analysis
  • Stress Corrosion
  • Tensile Strength
  • Test And Evaluation
  • Test Methods
  • Ultrasonic Inspection
  • Yield Strength

Readers

  • Materials Science (Mechanical Engineering).
  • Rocket Propulsion.
  • Structural Health Monitoring of Composite Structures.