Its Bearing on the Working Properties of Aluminium and Aluminium Alloy Products
This article first appeared in the Volume 4, Number 50 (December, 1942) issue of Aircraft Production magazine, and is presented here through the kind permission of Flight International. Thanks also to Bruce Vander Mark for furnishing volumes of Aircraft Production for scanning.
This article was based upon a bulletin subsequently be issued by the Northern Aluminium Co., Ltd., which included tables on the mechanical properties of light alloy sheet, plate, extruded products and casting alloys.
|Fig. 1. Typical tensile test specimens. In the order shown, they are: Turned specimen for wedge grips; Sheet specimen for wedge grips; Sheet specimens for pin-jointed grips; Screwed and turned specimen.|
The testing of materials, whether of a commercial or research nature, is conducted with the object of ascertaining data regarding their physical and mechanical properties, and it is nowadays regarded as a part of inspection procedure. Few firms would consider purchasing, or manufacturers selling, materials that have not been so tested.
Values of ultimate tensile stress, 0.1% proof stress, percentage elongation and reduction of area are all obtained from a single test and may therefore be treated together.
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