Corrosion fatigue strength of Al-Mg alloys welded by TIG

摘要

This article presents the results of low-cycle fatigue corrosion tests of AW-5083 and AW-5059 (Alustar) alloys welded by TIG. The low-cycle fatigue tests were carried out in air and 3.5 percent NaCl solution, at constant amplitude of the stress value, the one-side tension cycles and frequency 0.2 Hz. The number of cycles to failure, upper and lower extreme values of force and strain for the selected cycles, duration time of the test and frequency were recorded. For that specimens of 5083 alloy the fatigue durability was lower than that for specimens of 5059 (Alustar) alloy. The changes in total strain amplitude in function of the number of cycles [N] observed in the tests at delta_a = const, and the low-cycle fatigue resistance are shown,