INVESTIGATION OF MECHANISM OF FAILURE OF HIGH-STRENGTH MATERIALS. PART I. THE EFFECT OF SPECIMEN GEOMETRY ON FRACTURE TOUGHNESS OF HIGH-STRENGTH SHEET STEEL. PARTII. THE EFFECT OF TEMPERING TEMPERATURE, GRAIN SIZE AND TEST TEMPERATURE ON FRACTURE TOUGHNESS OF HIGH-STRENGTH SHEET STEEL
Abstract
As a result of the brittle fracture of a number of solid propellant rocket motor cases at stresses well below the design yield strengths of the sheet steels used (200,000 psi or better), an investigation was begun. The investigation included: The effect of specimen geometry on fracture toughness; and the effect of tempering temperature, grain size, and test temperature on fracture toughness. Such factors effecting fracture toughness as width, crack length-to-width ratios, width-to-thickness ratios, constant crack lengths, ferrite grain sizes, and the effect of different tempering temperatures on all of the foregoing factors, were discussed.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 12, 1962
- Accession Number
- AD0273672
Entities
People
- Edward O. Jones Jr.
- Hal W. Mueller
- Richard E. Maynor