Method for the nondestructive testing of cellular metallics
AssigneeThe Boeing Company
InventorsFrederick J. Feiertag, Dale L. McLellan
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Abstract
Method of nondestructively measuring percent elongation or ductility of a cellular metallic. After surface preparation, the number of metal cells per unit area are counted, either manually or using an automated technique. The cell count is utilized in a relationship unique to the cellular metallic which correlates cell count to ductility in terms of percent elongation. The effects of the structural configuration of the cellular metallic, porosity and eutectic morphology are also discussed.
Claims9
A method for nondestructively measuring the ductility of a cellular metallic, comprising:
- providing a cellular metallic,
- selecting an arbitrary zone of said metallic wherein a measurement is to be made,
- counting substantially all of the metal cells within a surface area of said zone, and
- correlating the number of said metal cells per unit area to the ductility of said zone of said cellular metallic.
A method for nondestructively measuring the ductility of a cellular metallic, comprising:
- providing a cellular metallic,
- selecting a zone of said metallic wherein a measurement is to be made,
- counting substantially all of the metal cells within a surface area of said zone, and
- correlating the number of said metal cells per unit area to the ductility of said zone of said cellular metallic according to the following relationship:
- ##EQU8## where EL=total average elongation (ductility) in percent.
- N=number of metal cells per unit area
- A, B, C, D,=empirical constants.
Dependencies are inferred from the claim text.