INVESTIGATION OF MECHANISM OF FAILURE OF HIGH-STRENGTH MATERIALS. PART II. THE EFFECT OF THICKNESS AND TEMPERING TEMPERATURE ON FRACTURE APPEARANCE TRANSITION TEMPERATURE AND CRITICAL FRACTURE TOUGHNESS OF HIGH STRENGTH SHEET STEEL.
Abstract
The critical fracture toughness parameter, K sub c, of AMS-6434 sheet steel reflected a degree of independence of specimen thickness at yield strengths, sigma sub YS, of 191.5 and 236 ksi, when considered in terms of any particular test temperature within the range -300 to 300F. The K sub c parameter generally followed the trend established by increasing proportion of shear fracture, regardless of the existence of individual or collective effects of sheet thickness, tempering temperature or test temperature. Fracture appearance transition temperature, FATT, was observed to decrease non-linearly with decreasing specimen thickness for sigma sub YS = 191.5 and 236 ksi. The effect of decreasing thickness was relatively more pronounced in depressing FATT than was the effect of increasing tempering temperature. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 30, 1963
- Accession Number
- AD0607314
Entities
People
- Hal W. Maynor Jr.
- Ralph E. Blair