Research on the impact of aluminium alloys forming technology on the resistance to fatigue

• Published in: Journal of physics. Conference series Vol. 1268; no. 1; pp. 12025 - 12030
• Main Authors: Zakharchenko, K V, Kapustin, V I, Larichkin, A Yu, Raevskaya, G A
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.07.2019
• Subjects: Aluminum base alloys; Control equipment; Copper; Creep (materials); Deformation; Fatigue tests; Heat treating; Heat treatment; Magnesium; Nondestructive testing; Physics; Thick plates
• ISSN: 1742-6588; 1742-6596
• DOI: 10.1088/1742-6596/1268/1/012025

The research is devoted to the evaluation of the impact of aluminium alloys processing by pressure in creep on the resistance to fatigue. Using the developed accelerated, non-destructive method, the kinetics of the total deformations response (longitudinal and transverse components) during deformation of the sample with increasing loading is considered. In the frames of this method, the limiting stresses are determined, a conservative estimate of the endurance limit for V95 and V-1461 aluminium alloys (analog 7475) (Al-Zn-Mg-Cu) and (analog 2099) (Al-Cu-Li-Zn), respectively, is obtained. Thick plates (40 mm) are molded on the UFP-1M equipment in creep, and surface control is carried out. More than 80% of the plate's area is molded with a deviation of less than 1 mm from the nominal size. The microstructure of V-1461 alloy is studied before and after forming, and fatigue tests are performed on samples made of molded panels. Analysis of the research results showed that for the V95 and V-1461 alloys, the selected characteristics of the technological process of forming and heat treatment do not impair the fatigue properties of the studied alloys.