Study of Aluminum Alloy AA2219 After Heat Treatment

Gupta, Rohit; Panda, Rajiv; Mukhopadhyay, A. K.; Kumar, Vineet; Sankaravelayutham, P.; George, K. E.

doi:10.1007/s11041-015-9888-0

Cited by 19 publications

(6 citation statements)

References 3 publications

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“…The 2219 alloy has been developed in 1954 (year of standard designation). Some authors [12,13] have noted the high temperature stability of this alloy. They conducted several mechanical tests on a 2219-T87 alloy heat-treated between 165 and 185°C and reported stable mechanical properties of the alloy after being exposed between 12 and 30 hours at the given temperatures.…”

Section: Methodsmentioning

confidence: 90%

“…The tensile yield stress value was slightly above 300 MPa and, ultimate tensile strength was around 400 MPa. Notice that these authors only studied these experimental conditions in order to improve the thermomechanical process optimization, as mentioned previously [12,13]. The 2219 alloy mostly contains precipitates, which have been widely studied in the literature [14][15][16].…”

Section: Methodsmentioning

confidence: 99%

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Long-term thermal ageing of the 2219-T851 and the 2050-T84 Al-Cu alloys

Bello

Larignon

Douin

2021

Materials Today Communications

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In this study, the influence of high temperature exposure on mechanical properties as well as on the microstructures of two Al-Cu alloys, has been investigated. Driven by an industrial will to use structural aluminium at higher temperature than usually stated, this work is focused on the characterization of the evolution of two commercial alloys, the 2219-T851 and the 2050-T84, induced by an ageing treatment of 1000 hours at 200°C. Careful TEM observations confirm the importance of the nanoscale precipitation and that the precipitate size and distribution strongly influence the mechanical properties of the studied alloys. Results unexpectedly show that the precipitates are more stable in time than the precipitates at this temperature. Regarding the mechanical properties related to ageing, it follows that the 2219-T851 alloy presents a reduced drop with time of its tensile test curves compared to the 2050-T84, thus a limited, and at least less pronounced, temperature dependence. For an industrial application on structural part, 2219-T851 alloy then appears to be a good candidate for long-term structural applications at intermediate temperatures.

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Section: Methodsmentioning

confidence: 90%

Section: Methodsmentioning

confidence: 99%

Long-term thermal ageing of the 2219-T851 and the 2050-T84 Al-Cu alloys

Bello

Larignon

Douin

2021

Materials Today Communications

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“…Heat treatments of joints after welding reduces the share of θ-phases in the seam structure, and regulate the size of eutectic layers [7,8]. This makes the morphology of weld structure similar to the structure of other joint zones and make possible to increase strength, but with a decrease in plasticity [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Comparative Studies of the Properties of Heat-Treated Welded Joints of AA2219 Alloy

Nyrkova,

Osadchuk,

Labur

et al. 2023

Metallofiz. Noveishie Tekhnol.

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Comparative studies of welded joints of AA2219 alloy after corrosion tests in amyl (which is used as rocket fuel) are carried out. No changes in the morphology and dimensions of structural parameters in metal of seams and in heataffected zone are revealed after exposure in amyl. Corrosion resistance of the AA2219-T81 and AA2219-T62 alloys in amyl corresponds to the standard metal resistance group-'resistant'. Welded joints are also resistant against intergranular and exfoliating corrosion as well as corrosion cracking: no local corrosion defects are detected. Strength coefficient of AA2219-T62 welded joints is by 30% higher than for AA2219-T81 joints, and, for both types, it is equal to 0.96 and 0.65, respectively. After soaking in amyl, T62 joints have higher ultimate strength and yield stress compared to T81 ones. Strength coefficient of AA2219-T62 welded joint after corrosion tests remains higher (0.94) than the strength coefficient of AA2219-T81 welded joint (0.65). At the same time, decrease in relative elongation of both joints may point to embrittlement of structural components in corrosive environment. As established, the heat-treatment conditions do not affect the values of resistance against uniform and local corrosion, mechanical strength and plasticity of the base metal. However, for welded joints, strength and plasticity are affected by heat-treatment conditions: AA2219-T62 joints have more uniform structure

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“…2219 aluminum alloy is a suitable material for manufacturing large-scale, thin-wall parts in the astronautic industry, such as the cryogenic fuel tank of launch vehicles, thanks to its characteristics of good weldability, corrosion stability as well as its superior qualities in specific strength and thermal stability [1,2]. The manufacturing process of 2219 aluminum alloy is composed of welding, heat treatment, and plastic formation [3].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Properties of Friction Stir Welded 2219 Aluminum Alloy under Heat Treatment and Electromagnetic Forming Process

Wang

Huang

et al. 2018

Metals

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Among available processing technologies of heat-treatable aluminum alloys such as the 2219 aluminum alloy, the use of both friction stir welding (FSW) as joining technology and electromagnetic forming (EMF) for plastic formation technology have obvious advantages and successful applications. Therefore, significant potential exists for these processing technologies, both of which can be used on the 2219 aluminum alloy, to manufacture large-scale, thin-wall parts in the astronautic industry. The microstructure and mechanical properties of 2219 aluminum alloy under a process which compounded FSW, heat treatment, and EMF were investigated by means of a tensile test as well as via both an optical microscope (OM) and scanning electron microscope (SEM). The results show that the reduction of strength, which was caused during the FSW process, can be recovered effectively. This can be accomplished by a post-welding heat treatment composed of solid solution and aging. However, ductility was still reduced after heat treatment. Under the processing technology composed of FSW, heat treatment, and EMF, the forming limit of the 2219 aluminum alloy decreased distinctly due to the poor ductility of the welding joint. A ribbon pattern was found on the fractured surface of welded 2219 aluminum alloy after EMF treatment, which was formed due to the banded structure caused by the FSW process. Because of the effects of induced eddy current in the EMF process, the material fractured, forming a unique structure which manifested as a molten surface appearance under SEM observation.A welding joint with fewer welding defects and higher performance can be obtained through the solid bonding achieved by FSW [5]. A heat treatment composed of solid solution and aging can produce a dispersive distribution of precipitated phase, which can bring a remarkable improvement in the mechanical properties of 2219 aluminum alloy [6]. Simultaneously, as a high-velocity forming method, electromagnetic forming (EMF) can increase the forming limit of material and improve the performance of the workpieces compared with conventional quasi-static forming technologies [7,8]. Thus, in the astronautic industry, there is significant potential for the application of these processing technologies in the manufacturing of large-scale, thin-wall parts [9].FSW technology, which can create solid bonding through the frictional effects of the tool shoulder and the stirring effect of the pin, has been widely applied in the manufacture for large-scale parts of aluminum alloys. Extensive research has been conducted as to the influence of processing parameters and the plastic flow behavior during FSW treatment. After FSW treatment, the microstructure and properties of the welding joint on the butt-welded 2219 aluminum alloy sheets are predominantly affected by rotation speed, welding speed, pin geometry, and the post-welding heat treatment [5,10]. Because of the penetrating depth which occurs during the FSW process, the surface material is extruded by the tool shoulder and flows...

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Study of Aluminum Alloy AA2219 After Heat Treatment

Cited by 19 publications

References 3 publications

Long-term thermal ageing of the 2219-T851 and the 2050-T84 Al-Cu alloys

Long-term thermal ageing of the 2219-T851 and the 2050-T84 Al-Cu alloys

Comparative Studies of the Properties of Heat-Treated Welded Joints of AA2219 Alloy

Microstructure and Properties of Friction Stir Welded 2219 Aluminum Alloy under Heat Treatment and Electromagnetic Forming Process

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