Experimental Study on Vibration Fatigue Behavior of Aircraft Aluminum Alloy 7050

Abstract

It has been previously noted that the development of aerospace material technology and breakthroughs are inseparable when obtaining great achievements in the aerospace industry. Materials are the basis and precursor of modern high technology and industry. As one of the most powerful aluminium alloys, 7050 is widely used in the aerospace field. In this manuscript, the vibration fatigue behaviour of aircraft aluminium alloy 7050 is studied based on experiments. A vibration fatigue experiment and the traditional fatigue testing of aluminium alloy 7050 were performed. We found that there was an extreme difference between the vibration fatigue and the traditional fatigue curves. In addition, the experimental end criteria for the vibration fatigue experiment of aluminium alloy 7050 was obtained from the acceleration reduction and the frequency reduction value. For the acceleration experimental end criterion, 2% was the acceleration reduction value for the vibration fatigue experimental end criteria of aluminium alloy 7050. For the frequency experimental end criterion, 2% was the frequency reduction value for the vibration fatigue experimental end criteria of aluminium alloy 7050.

Effect of Cold Pressing Deformation on Microstructure and Residual Stress of 7050 Aluminum Alloy Die Forgings

“…With a rising number of massive forging machines, large-scale aluminum alloy forgings are widely being designed and used to enhance structural integrity and decrease aircraft weight. Due to its exceptional comprehensive qualities, including strength, fatigue performance, and hardenability, the 7050 aluminum alloy is frequently used for aeronautical die forging [ 3 , 4 , 5 , 6 , 7 ]. Due to the unequal shrinking of internal and external sides brought on by an abrupt temperature difference during the quenching process, residual stresses are inexorably generated during the manufacturing process in aluminum alloy forgings.…”

Effect of Solution Heat Treatment on the Microstructure and Microhardness of 7050 Aluminum Alloy

“…As a typical precipitate-hardened metallic material, 7050 aluminum alloy has been widely used in the aerospace and automotive fields, in accordance with the development trend of lightweight structural materials, because of its light weight, high strength, good anticorrosion properties, antioxidant properties, fatigue performance, resistance to stress corrosion cracking, and other advantages [1][2][3][4]. Generally, 7050 aluminum alloy is used in aircraft structures, such as fuselage frames, wing walls, landing gear support components [5,6]. The 7050 aluminum alloy is an age-strengthened material that is commonly heat-treated to achieve the desired properties.…”

Experiment and Smith, Watson and Topper model parameter to correlate fatigue life of rail steel

“…The safety of parts are rely on the value of loading to in uence it is operation [2] . Nowadays, several tests have been regularly practise in broadly without borders likely simulation, FKM guidelines, SAE, ASTM and EUWA for mechanical failures [8,9,10,11] . This paper present to focus in experiment and to develop mathematics model of Smith, Watson and Topper to estimate the fatigue life as correlation for R260 material and create the databases library for future research.…”