Effect of cold work on the tensile properties of 6061, 2024, and 7075 Al alloys

Ortiz, Daniel R.; Abdelshehid, M.; Dalton, R.; Soltero, J. F. A.; Clark, Russell A.; Hahn, M.; Lee, E.; Lightell, W.; Pregger, B; Ogren, J.; Stoyanov, Pantcho; Es‐Said, O.S.

doi:10.1007/s11665-007-9074-7

Cited by 28 publications

(15 citation statements)

References 2 publications

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“…When analyzing the presented issue, we should also consider the aspects of grain micro--mechanics. Based on the work of Ortiz et al (2007), the average grain size of aluminum alloy 6061 is approximately 30 µm long and about 13 µm wide. These values are an average, and their approximation is intended to indicate the number of grains in one vertex of roughness.…”

Section: Strain Work Of "Grains"mentioning

confidence: 99%

Numerical analysis of contact plastic bodies made by aluminium alloy with taking account of micro-roughness surfaces

Sidun

Piwnik

2019

Journal of Theoretical and Applied Mechanics

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The following article describes selected aspects of numerical modeling of the process of bonding metal alloys with consideration for micro-roughness. Plastic contact between two deformable bodies is studied within a DEFROM FEM environment. The paper presents selected numerical analysis results for an aluminum alloy. The mathematical model of surface roughness has been created on the basis of the surface real profile. The dependence between the tool lathe angle and the feed has been used to build a numerical model of roughness after completion of the turning process. The article investigates the impact of wave roughness in respect to the size effect and the possibility of cold welding as well as the simplification process of real surface roughness.

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Section: Strain Work Of "Grains"mentioning

confidence: 99%

Numerical analysis of contact plastic bodies made by aluminium alloy with taking account of micro-roughness surfaces

Sidun

Piwnik

2019

Journal of Theoretical and Applied Mechanics

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“…Literatürde fırında bu sıcaklıklarda 30 dakika bekletme, su verme ve doğal yaşlandırma sonucu maksimum mukavemet elde edildiği ve mekanik özelliklerin 4-5 gün'de hemen hemen, 7 gün sonunda ise tamamen stabil hale geldiği ve yıllar sonra bile değişiklik göstermediği belirtilmektedir (Şekil 2). Bu durumda malzeme T4 temperi durumuna getirilmiş olmaktadır [13,14].…”

Section: Introductionunclassified

Al 2024 Alaşımının Çökelme Sertleşmesi İşlemi Koşullarının Şekillendirilebilirliğe Etkisinin İncelenmesi

Dilmeç¹,

Tınkır²,

Arıkan³

2015

Çukurova Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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ÖzetBu çalışmada, uzay ve havacılık endüstrilerinde sıkça kullanılan Al 2024 sac malzemenin çökelme sertleşmesi işlemi koşullarının mekanik özelliklere, Ericksen İndeksine etkisi ANOVA analiz ve Yapay Sinir Ağı Tabanlı Bulanık Mantık yöntemleriyle incelenmiştir. Ayrıca etkili parametrelerin sac malzemenin Şekillendirme Sınır Eğrisine etkisi de incelenmiştir. Optimum ısıl işlem koşullarını belirlemek amacıyla, çözeltiye alma sıcaklığı, fırında bekletme, suya verme gecikme süreleri ve ısıtma hızının malzemenin mekanik özelliklerine ve Ericksen İndeksine etkisi öncelikle ANOVA analiz yöntemiyle incelenmiş ve elde edilen deneysel sonuçlara göre deney sisteminin yapay sinir ağı tabanlı bulanık mantık modeli oluşturulmuştur. Bu modelleme tekniğinin doğrulanmasında deneysel veriler kullanılmış ve sistem parametrelerinin şekillendirilebilirliğine etkisi üzerinde tahmin kabiliyeti belirlenmiştir. Çözeltiye alma sıcaklığının en efektif parametre olduğu ve solüsyona alma süresi ve suya verme gecikme süresinin ise daha az etkili olduğu belirlenmiştir. Sonuç olarak, 493°C'de 30 dakika çözeltiye alma ve 2 sn gibi çok kısa bir sürede suya verme koşullarında optimum özelliklerin elde edilebileceği anlaşılmıştır. Anahtar Kelimeler: Al 2024, Bulanık mantık, Çökelme sertleşmesi Isıl işlemi, Ericksen indeksi Investigation on Influence of Conditions of Precipitation Hardening Process on the Formability of AA2024 Alloy AbstractIn this study, influence of precipitation hardening process conditions of AA2024 aluminum alloy which is widely used in aerospace and aviation industries on its Ericksen Index and mechanical properties was investigated by using ANOVA analysis and artificial neural network based fuzzy logic methods. Moreover, effects of the effective factors on anisotropy coefficient and Forming Limit Curve were also researched. Firstly, effects of solution temperature, soak time, quenching delay and heating rate on material properties and EI determine the optimal heat treatment conditions and model of artificial neural network based fuzzy logic was constructed according to the obtained results. The experimental data were used for validate this model technique and the predictability of the constructed model on influence of

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“…Although it does not produce hardness as great as those obtained from the reverse order, the final hardness is greater than that developed by using either method alone. The good formability combined with the option of strength improvement by precipitation hardening of aluminium alloys makes it viable to cold form very intricate geometries at an optimal tool load and yet to obtain a strength comparable to that of low carbon steel by subsequent heat treatment [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…In view of the above aspects, it is interesting to examine the possibility of enhancing the hardness and yield strength through cold working which is generally applied during most of the forming operations of aluminium alloys [8,11]. It is important to note that micro cracks are expected to generate due to high percentage of cold working which in turn transforms the material susceptible to normal loading conditions.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, the present work is designed specifically to achieve the effect of small amount of cold working so that it could be useful for higher strength with minor loss of ductility. However, no limits are set on the amount of cold working of aluminium alloys [8]. The present alloy is subjected to 10 % cold deformation prior to ageing to observe its characteristics and applicability towards high specific strength requirement of different components for engineering applications.…”

Section: Introductionmentioning

confidence: 99%

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Influence of 10 % Cold Rolling Reduction on Ageing Behaviour of Hot Rolled Al-Cu-Si–Mn-Mg Alloy

Ghosh

2014

J. Inst. Eng. India Ser. D

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In the current study, the effect of 10 % cold rolling on the different ageing phenomena of Al-Cu-SiMn-Mg alloy was investigated. Both hot rolled and cold rolled alloys were subjected to both natural and artificial ageing processes. Hardness was measured to understand the change in the mechanical property of the alloy before and after rolling and also during ageing processes. From microscopy, it was evident that the cold rolling and subsequent ageing provided the alloy with a structure in which CuAl 2 precipitates were uniformly distributed. The alloy exhibited the peak hardness value of 92 VHN after 2 days of natural ageing, whereas the cold deformed (10 %) alloy exhibited the higher peak hardness value of 139 VHN after 3 days of natural ageing. Peak hardness of the alloy reached 94 VHN, when hot rolled alloy was subjected to ageing at 250°C for 1 h, whereas 10 % cold rolling followed by ageing (100°C, 15 min) demonstrated accelerated and elevated hardening. The ageing behaviours thus obtained permit the alloy to provide a range of desirable combinations of strength and ductility for high strength weight saving applications.

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Effect of cold work on the tensile properties of 6061, 2024, and 7075 Al alloys

Cited by 28 publications

References 2 publications

Numerical analysis of contact plastic bodies made by aluminium alloy with taking account of micro-roughness surfaces

Numerical analysis of contact plastic bodies made by aluminium alloy with taking account of micro-roughness surfaces

Al 2024 Alaşımının Çökelme Sertleşmesi İşlemi Koşullarının Şekillendirilebilirliğe Etkisinin İncelenmesi

Influence of 10 % Cold Rolling Reduction on Ageing Behaviour of Hot Rolled Al-Cu-Si–Mn-Mg Alloy

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