Open AccessA normalized method for determining the influence on the fixed joints tightness using the technology of the sealing surface job
Author(s) -
В. В. Овчинников,
V.A. Berezina,
T. Yu. Skakova
Publication year - 2021
Publication title -
naukoëmkie tehnologii v mašinostroenii
Language(s) - English
Resource type - Journals
ISSN - 2223-4608
DOI - 10.30987/2223-4608-2021-11-20-29
Subject(s) - welding , materials science , alloy , fracture (geology) , surface roughness , metallurgy , aluminium , surface finish , composite material , structural engineering , engineering
On the basis of metallographic analysis and test results of samples of welded junctions of aluminum alloys AMg6 and D16T, made by friction stir welding, for static stretching, it is shown that destruction occurs in the zone of thermo-mechanical action for the AMg6 alloy and in the zone of thermal influence for the D16T alloy. At the same time, the dependence of the temporary resistance value of the welded junction on the state of the seam weld face has not been revealed. Tests for low-cycle fatigue have shown that the endurance limit is clearly dependent on the amount of seam weld face roughness. The value of the roughness of the seam weld face for the studied alloys has been determined, in which the nature of the fracture during the low-cycle fatigue test changes from multi-stage to single-stage.