THE NATURE OF STEEL FRACTURE
Abstract
During the study of the structure of fracture the following basic characteristics were investigated: (1) the linear dimensions of the crystalline section and its multiplanarity; (2) the geometry of the perimeter of the section; (3) the system of bands, striations, slips, and their dimensions; (4) the cracks, fissures, or other disruptions in the continuity of the crystalline section; and (5) the condition of the surface of the section. In the case of lowcarbon (0.03-0.04% C) unalloyed steel the crystalline sections are distinguished by the unusual richness of their linear systems. The most typical is the acicular packet arrangement of crystalline formations. The latter are themselves formed from a mass of tiny units. Thus, these tiny crystalline units are also not singlecrystals, but are composed of a mass of crystalline splinters. The external difference between the types of fracture is due to the difference in their internal structure. The various mechanisms of formation of crystalline structure determine the differences in type of fracture. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 04, 1960
- Accession Number
- AD0256130
Entities
People
- M.p. Braun
Organizations
- National Air and Space Intelligence Center