Accession Number : AD0801256

Title :   FUNDAMENTAL ASPECTS OF FRACTURE, WITH REFERENCE TO THE CRACKING OF STEEL WELDMENTS.

Descriptive Note : Technical rept.,

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

Personal Author(s) : Tetelman, A. S.

Report Date : SEP 1966

Pagination or Media Count : 39

Abstract : For a notch or crack in a large plate, the fracture toughness and G sub Ic value are related to the product of the local stresses at the crack tip and the critical crack opening displacement. The latter parameter varies for cleavage and low energy (brittle) tear fracture. It depends on external variables such as temperature and loading rate, macroscopic variables such as root radius and plate thickness, and microscopic variables such as yield strength level, which in turn depends on grain size and dispersed particle content. Recent investigations have shown that the macroscopic and microscopic aspects of the fracture problem can be related through the tensile ductility. This relationship is discussed and the physical significance of G sub Ic is explained for various types of unstable fracture. Particular emphasis is placed on the metallurgical aspects of the embrittlement of steel weldments. (Author)

Descriptors :   *FRACTURE(MECHANICS)), (*WELDS, (*STEEL, WELDS), TOUGHNESS, EMBRITTLEMENT, DUCTILITY, STRESSES.

Subject Categories : Metallurgy and Metallography
      Couplers, Fasteners, and Joints

Distribution Statement : APPROVED FOR PUBLIC RELEASE