Accession Number : AD0837112

Title :   THE RELATIONSHIP BETWEEN PRESSURE EFFECTS UPON FRACTURE MECHANISMS AND DUCTILITY AND ITS PRACTICAL IMPLICATIONS,

Corporate Author : WATERVLIET ARSENAL NY

Personal Author(s) : Davidson, Thomas E. ; Nolan, Charles J.

Report Date : 1968

Pagination or Media Count : 15

Abstract : The effects of superposed pressure upon the tensile ductility of a variety of metals have been measured by several investigators(2)(3)(4). Typical results from these investigations are shown in Figure 1. As can be seen, the form of the ductility-pressure relationship and the response of ductility to pressure vary considerably between materials. In terms of the form of the ductility-pressure relationship, the various results tend to fall into four general categories. The first category is where the ductility increases at greater than a linear rate as is the case for Cu and Al. The second is where ductility increases at less than a linear rate as in Co. The third category is where ductility is a linear function of pressure as is observed for some steels and cast iron. The fourth category is where ductility abruptly increases over a narrow pressure region in what might be called a pressure-induced brittle-ductile transition as is observed in Zn, Bi and W. (Author)

Descriptors :   (*METALS, MECHANICAL PROPERTIES), (*FRACTURE(MECHANICS), METALS), LOADS(FORCES), DUCTILE BRITTLE TRANSITION, YIELD POINT, TENSILE PROPERTIES, EXTRUSION, MARAGING STEELS, NICKEL ALLOYS.

Subject Categories : Metallurgy and Metallography
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE