Характеристики разрушения алюминиевых сплавов при малых скоростях деформации в нормальных и агрессивных условиях

Fracture characteristics obtained upon destruction of the samples cut from the slabs and extruded profile of D16chT aluminum alloy are studied. Tests are carried out on a tensile testing machine VME-10TM in air and in 3% NaCl solution at low strain rates. Fracture characteristics time to fracture, fracture energy, elongation, specific reduction, maximum stress and maximum load are obtained at a strain rate of 4.2 X 10 5 to 4.2 X 10 6 sec l . Comparison of the fracture characteristics obtained in air and in 3% NaCl solution revealed that time to failure and fracture energy appreared to be the most sensitive parameters in assessing the susceptibility of semiproducts made of D16nhT alloy to corrosion cracking alloy. For the samples cut from the slabs, the most sensitive characteristic is elongation in contrast to the samples obtained from the extruded panels is which elongation remained practically the same.