Accession Number:

AD0837112

Title:

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

Descriptive Note:

Corporate Author:

WATERVLIET ARSENAL NY

Personal Author(s):

• Davidson, Thomas E.
• Nolan, Charles J.

Report Date:

1968-01-01

Pagination or Media Count:

15.0

Abstract:

The effects of superposed pressure upon the tensile ductility of a variety of metals have been measured by several investigators234. 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