The effect of tempering on low cycle fatigue behavior of Al-2024

Mohamed, Aezeden; El-Madhoun, Y.; Bassim, M.N.

doi:10.1016/j.jmatprotec.2005.02.111

Cited by 10 publications

(6 citation statements)

References 8 publications

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“…There was no evidence of slip deformation bands in specimens from any of the three methods of age hardening and at any plastic strain amplitude, although all these specimens were cyclically deformed. A similar study done by the author [11] on aluminum copper alloys Al-2024 also found no slip bands after fatigue testing, thus agreeing with the current study. The mechanism behind the phenomena is, however, unclear.…”

Section: Figure 5 Sem Images Of Oil Quenched For Alloy C460 No Evidensupporting

confidence: 93%

Macro-Micro Scale Observation of Cyclic Hardening-Softening and Precipitates Zone of C460

Mohamed¹

2013

IOSRJEN

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Three sets of age hardened aluminum-lithium alloy C460 specimens were produced by oil quenching, air cooling, and furnace cooling and subjected to cyclical, symmetric tension-compression testing. On examination of microstructures with the aid of scanning electron microscopy, precipitates free zones were identified adjacent to grain boundaries. It was also found that the specimens with the smallest precipitates free zones exhibited the highest fatigue strengths.

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Section: Figure 5 Sem Images Of Oil Quenched For Alloy C460 No Evidensupporting

confidence: 93%

Macro-Micro Scale Observation of Cyclic Hardening-Softening and Precipitates Zone of C460

Mohamed¹

2013

IOSRJEN

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“…Needle-like precipitates form in two orientations in the O-temper alloy that are not present in the T6 temper (Mohamed et al 2005). Sarioglu and Orhaner (1998) found that cyclic softening occurred after prolonged heating at 130°C and propose the following explanations: over-aging of the components, resolutionizing the alloy, microstructural inhomogeneities in the alloy, or dissolution due to ripening.…”

Section: Aluminum Alloymentioning

confidence: 99%

“…Tensile properties of the alloys AA2024 or the T3 and T81 temper designations (Kuo et al 2005 Because of the exposure to elevated temperatures in the AM2 application, the issue of overaging is addressed. In general, overaging of 2024 is not advantageous for fatigue life applications and over-refining grain size also has a detrimental effect (Bray et al 2001;Kamp et al 2007;Rodopoulos and Kermanidis 2007;Sarioglu and Orhaner 1998;Mohamed et al 2005). …”

Section: Aluminum Alloymentioning

confidence: 99%

Analysis of Lightweight Materials for the AM2 System

Allison¹,

Rushing²,

Garcia³

2014

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An analysis was performed on potential materials that could replace the 6061-T6 aluminum alloy currently used in the AM2 airfield matting for the purpose of light-weighting the design. An in-depth analysis was performed on metal and polymer matrix composites. However, neither groups of materials produced a suitable material based on operating conditions of the AM2. Newly developed extruded magnesium alloys were identified that could potentially provide weight savings of 30 to 40% while maintaining the current performance of the AM2. In addition, traditional high-strength aluminum alloys were identified that could provide substantial weight savings. However, manufacturing issues existed due to the high strength of these aluminum alloys. Finally, analysis was performed to determine the cost of manufacturing the AM2 using these alternate materials.

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“…The reason for this was that the effects of T6 treatment disappear, in other words, the material was annealed at this temperature. In the literature, the hardness value of Al7075 alloy without T6 treatment has been reported as ~71 HV [29]. HV to ~98 HV [30].…”

Section: Micro-hardnessmentioning

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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The effect of tempering on low cycle fatigue behavior of Al-2024

Cited by 10 publications

References 8 publications

Macro-Micro Scale Observation of Cyclic Hardening-Softening and Precipitates Zone of C460

Macro-Micro Scale Observation of Cyclic Hardening-Softening and Precipitates Zone of C460

Analysis of Lightweight Materials for the AM2 System

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

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