Effects of Re-Aging on the Fatigue Properties of Aluminum Alloy AA7075

Fakioglu, Avni; Özyürek, Dursun

doi:10.3139/120.110598

Cited by 11 publications

(5 citation statements)

References 35 publications

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“…This was evident from the presence of fine and round pores and large number of pits. The ductile fraction which occurred in the structure was supported by joining of small gaps, which led to formation of larger pits as seen in fractured surface images [11,19].…”

Section: Resultsmentioning

confidence: 95%

Effects of Different Solid Solution Temperatures on Microstructure and Mechanical Properties of the AA7075 Alloy After T6 Heat Treatment

Tekeli

Şimşek

et al. 2019

High Temperature Materials and Processes

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In this study, the effect of solid solution temperature on microstructure and mechanical properties of the AA7075 alloy after T6 heat treatment was investigated. Following solid solution at five different temperatures for 2 hours, the AA7075 alloy was quenched and then artificially aged at 120∘C for 24 hours. Hardness measurements, microstructure examinations (SEM+EDS, XRD) and tensile tests were carried out for the alloys. The results showed that the increased solid solution temperature led to formation of precipitates in the microstructures and thus caused higher hardness and tensile strength.

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Section: Resultsmentioning

confidence: 95%

Effects of Different Solid Solution Temperatures on Microstructure and Mechanical Properties of the AA7075 Alloy After T6 Heat Treatment

Tekeli

Şimşek

et al. 2019

High Temperature Materials and Processes

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“…The Al-Zn-Mg-Cu alloys are exposed to metal fatigue due to cyclic loading, corrosion under environmental conditions, and thermal shock from abrupt temperature fluctuations in transmission systems. The formation and development of fatigue cracks caused by cyclic loading is one of the most significant problems in these alloys [ 111 , 112 ]. From the data collected in the literature, e.g., Refs.…”

Section: Effect Of LI On Properties Of Al-zn-mg-cu Alloysmentioning

confidence: 99%

The Role of Lithium in the Aging Precipitation Process of Al-Zn-Mg-Cu Alloys and Its Effect on the Properties

et al. 2023

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It is well known that the development of lightweight alloys with improved comprehensive performance and application value are the future development directions for the ultra-high-strength 7xxx series Al-Zn-Mg-Cu alloys used in the aircraft field. As the lightest metal element in nature, lithium (Li) has outstanding advantages in reducing the density and increasing the elastic modulus in aluminum alloys, so Al-Zn-Mg-Cu alloys containing Li have gained widespread attention. Furthermore, since the Al-Zn-Mg-Cu alloy is usually strengthened by aging treatment, it is crucial to understand how Li addition affects its aging precipitation process. As such, in this article, the effects and mechanism of Li on the aging precipitation behavior and the impact of Li content on the aging precipitation phase of Al-Zn-Mg-Cu alloys are briefly reviewed, and the influence of Li on the service properties, including mechanical properties, wear resistance, and fatigue resistance, of Al-Zn-Mg-Cu alloys are explained. In addition, the corresponding development prospects and challenges of the Al-Zn-Mg-Cu-Li alloy are also proposed. This review is helpful to further understand the role of Li in Al-Zn-Mg-Cu alloys and provides a reference for the development of high-strength aluminum alloys containing Li with good comprehensive properties.

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“…While GP zones can be occurred by ageing at room temperature, the common application in the literature is artificial ageing in the temperature range of 100-180 °C [18]. In the Al-Zn-Mg alloy system, the interface energy for the GP zones is very low.…”

Section: Supersaturated Solid Solutionmentioning

confidence: 99%

Investigation of the friction and wear properties of nitrided 7075-T6 aluminum alloy under vacuum and ambient air

ASL¹,

Sert²,

BAYRAK³

et al. 2022

Pamukkale J Eng Sci

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Al7075 alloy is commonly used in the automotive industry, components of military vehicles and aircraft, rubber and plastic moulds. Also, similar Al alloys are frequently used for mechanical parts in space exploration. Therefore, investigation of the wear properties under a vacuum environment is as indispensable as wear properties under an atmosphere. However, the wear performance of this alloy cannot meet the expectations. This paper reports the investigation of the obtained wear properties of Al7075-T6 alloy after plasma nitriding in ambient air and vacuum environments. The surface characterization and phase analysis of the formed AlN layers are determined by scanning electron microscope, energy dispersive X-ray spectrometer, 3D optical profilometer and X-ray diffractometer. The hardness of the nitride layer is established using Vickers micro-hardness tester. The wear performance of the untreated and nitride sample is investigated under 1N constant load at ambient air and vacuum environment. As a result of wear tests, the best wear performance of both conditions has been obtained from nitrided samples. The AlN layer (0.19) is observed to notably reduced the coefficient of friction of the substrate (0.60) under ambient air. Besides, it is observed that the nitride layer is better in ambient air (0.00010 mm 3 /Nm) than in vacuum environment (0.00087 mm 3 /Nm) in term of wear rate. In fact, the wear track on the nitrided sample is very thin under ambient air, and nearly imperceptible.Al7075 alaşımları, otomotiv endüstrisinde, askeri araçların ve uçakların bileşenlerinde, kauçuk ve plastik kalıplarda yaygın olarak kullanılmaktadır. Ayrıca, benzer Al alaşımları, uzay araştırmalarında mekanik parçalar için sıklıkla kullanılmaktadır. Bu nedenle, vakum altında aşınma özelliklerinin incelenmesi, atmosfer ortamındaki aşınma özellikleri kadar vazgeçilmezdir. Ancak söz konusu alaşımların aşınma performansı beklentileri karşılayamamaktadır. Bu bağlamda, bu çalışmada nitrürlenmiş Al7075-T6'nın atmosfer ve vakum ortamlarında aşınma özelliklerinin belirlenmesi amaçlanmıştır. Oluşturulan AlN tabakasının yüzey karakterizasyonu ve faz analizi, taramalı elektron mikroskobu, enerji dağıtıcı X-ışını spektrometresi, 3D optik profilometre ve X-ışını difraktometresi ile belirlenmiştir. Numunelerin sertliği, Vickers mikro sertlik test cihazı kullanılarak belirlenmiştir. Numunelerin aşınma performansı, bilye disk esaslı aşınma test cihazı kullanılarak atmosfer ve vakum ortamlarında incelenmiştir. Her iki koşul için de en iyi aşınma performansı nitrürlenmiş numunelerden elde edilmiştir. AlN tabakasının (0,19), ortam havası altında alt tabakanın (0,60) sürtünme katsayısını önemli ölçüde azalttığı gözlemlenmiştir. Nitrür tabakası sayesinde, alaşımın atmosfer ortamındaki aşınma direnci dikkate değer bir şekilde iyileştirilmiştir. Ayrıca aşınma oranı açısından nitrür tabakasının aşınma performansı, ortam havasında (0.00010 mm 3 /Nm) vakum ortamına (0.00087 mm 3 /Nm) göre daha iyi olduğu gözlemlenmiştir. Hatta numunelerdeki aşınma yolunun çok i...

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Effects of Re-Aging on the Fatigue Properties of Aluminum Alloy AA7075

Cited by 11 publications

References 35 publications

Effects of Different Solid Solution Temperatures on Microstructure and Mechanical Properties of the AA7075 Alloy After T6 Heat Treatment

Effects of Different Solid Solution Temperatures on Microstructure and Mechanical Properties of the AA7075 Alloy After T6 Heat Treatment

The Role of Lithium in the Aging Precipitation Process of Al-Zn-Mg-Cu Alloys and Its Effect on the Properties

Investigation of the friction and wear properties of nitrided 7075-T6 aluminum alloy under vacuum and ambient air

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