Accession Number : AD0845345

Title :   A Criterion for Plastically Induced Cleavage After General Yield in Notched Bend Specimens.

Descriptive Note : Technical rept.,

Corporate Author : STANFORD UNIV CA DEPT OF MATERIALS SCIENCE AND ENGINEERING

Personal Author(s) : Tetelman, A. S. ; Wilshaw, T. R.

Report Date : OCT 1968

Pagination or Media Count : 24

Abstract : Charpy V-notch specimens of mild steel with varying root radii were fractured in slow three point bending over a temperature range -196 to 20C. An analysis of the fracture data is presented based upon the relationship between the macroscopic deformation represented by the bend angle at fracture and the local plastic strains around the notch root. This analysis predicts that the critical bend angle at fracture should vary as the square of the root radius at a given temperature and is in agreement with the experimental observations. The physical significance of these micro- and macroscopic criteria are discussed. (Author)

Descriptors :   (*STEEL, MECHANICAL PROPERTIES), IMPACT TESTS, FRACTOGRAPHY, YIELD POINT, BENDING, LOW TEMPERATURE, DUCTILE BRITTLE TRANSITION, PLASTIC PROPERTIES, STRESSES, MATHEMATICAL MODELS, STRAIN(MECHANICS), LOADS(FORCES).

Subject Categories : Metallurgy and Metallography
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE