WRC 261:1980

$16.90

Effects of Porosity on the Facture Toughness of 5083, 5456, and 6061 Aluminum Alloy Weldments

Published By	Publication Date	Number of Pages
WRC	1980	20

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Description

Dynamic Tear and ?-integral specimens having four levels of porosity were prepared from weldable aluminum alloy welds (5083/5183, 6061/5356, and 5455/5556). All specimens were fatigue pre-cracked before testing. The amount of porosity was measured directly on the fracture surfaces using quantative metallographic methods and was divided into macro- and micro-porosity (pores equal to or larger than and smaller than 0.01-in., respectively). Radiography indicates only the macro-porosity as discrete pores. In general, there were 5 to 10 times more micro-porosity than macro-porosity found on the fracture surfaces. Total porosity was the sum of the macro- and the micro-porosity.

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