Microstructure and Mechanical Properties of Three-Layer TIG-Welded 2219 Aluminum Alloys with Dissimilar Heat Treatments

Zhang, Dengkui; Li, Quan; Zhao, Yue; Liu, Xianli; Song, Jianling; Wang, Guoqing; Wu, Aiping

doi:10.1007/s11665-018-3394-7

Cited by 15 publications

(6 citation statements)

References 15 publications

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“…The base material was 2219-C10S aluminum alloy plate with a dimension of 300 mm × 150 mm × 10 mm. The C10S alloy was prepared by solution heat treatment and cold working under deformation of approximately 10%, followed by artificial aging [18]. The filler metal was ER2325 (Al-Cu-Mn).…”

Section: Methodsmentioning

confidence: 99%

Effects of Post-weld Heat Treatment on Microstructure, Mechanical Properties and the Role of Weld Reinforcement in 2219 Aluminum Alloy TIG-Welded Joints

Zhang

Wang

et al. 2019

Acta Metall. Sin. (Engl. Lett.)

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In as-welded state, each region of 2219 aluminum alloy TIG-welded joint shows different microstructure and microhardness due to the different welding heat cycles and the resulting evolution of second phases. After the post-weld heat treatment, both the amount and the size of the eutectic structure or θ phases decreased. Correspondingly, both the Cu content in α-Al matrix and the microhardness increased to a similar level in each region of the joint, and the tensile strength of the entire joint was greatly improved. Post-weld heat treatment played the role of solid solution strengthening and aging strengthening. After the post-weld heat treatment, the weld performance became similar to other regions, but weld reinforcements lost their reinforcing effect on the weld and their existence was more of an adverse effect. The joint without weld reinforcements after the post-weld heat treatment had the optimal tensile properties, and the specimens randomly crack in the weld zone.

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Section: Methodsmentioning

confidence: 99%

Effects of Post-weld Heat Treatment on Microstructure, Mechanical Properties and the Role of Weld Reinforcement in 2219 Aluminum Alloy TIG-Welded Joints

Zhang

Wang

et al. 2019

Acta Metall. Sin. (Engl. Lett.)

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“…Six measurement values are taken along the depth direction of each measurement point, which are located at depths of 0.2 mm, 0.4 mm, 0.6 mm, 0.8 mm, 1.0 mm, and 1.2 mm, wherein the transversal direction represents a direction perpendicular to the weld seam, and the longitudinal direction represents a direction parallel to the weld seam. The chemical composition of the 2219 Aluminum Alloy used in this study is shown in Table 1 [19]. Specific welding parameters and the filler materials are listed in Table 2.…”

Section: Welding Samplesmentioning

confidence: 99%

Residual Stress Relief for 2219 Aluminum Alloy Weldments: A Comparative Study on Three Stress Relief Methods

Chen

Zhang

et al. 2019

Metals

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Thermal stress relief (TSR), vibration stress relief (VSR), and thermal and vibratory Stress relief (TVSR) have all been proven to be effective for residual stress relief. So far, no comparison has been made between the effects on residual stress relief of these three stress release methods. In this study, twelve 2219 aluminum alloy welding samples were divided into four groups. One of the groups is used as a reference without any stress relief treatment. The other three groups were processed by TSR, VSR, and TVSR, respectively. The residual stresses of depths of 0–1.2 mm are measured. Results show that small and uniform stresses are observed in the 2219 aluminum alloy welding samples after TSR, VSR, and TVSR treatment. TSR treatment decreased the peak residual stress much more than VSR and TVSR treatment. The maximum reduction of the peak residual stress is 50.8% (210 °C) in the transversal direction and 42.02% (185 °C) in the longitudinal direction after TSR treatment with the temperature range 140 °C to 210 °C. In terms of residual stress homogenization, although the TSR treatment has an advantage perpendicular to the weld direction, the effect parallel to the weld direction is not ideal. The TVSR has a good effect in both directions.

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“…The weakest part of butt-welded joints is heat-affected zone [6]. 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%

“…The effect of increasing of plastic properties of AA2219-T8 alloy welded joints in production of large-sized fuel tanks is achieved, for example, by using multipass welding with tensile strength coefficient of 70% relative to the strength of the base metal and relative elongation more than 4% [8].…”

Section: Introductionmentioning

confidence: 99%

“…It should be noted that after welding, welded structural elements, aggregates and assemblies made of AA2219 alloy are usually subjected to heat treatment [8] according to various modes, which depend on the level of physical and mechanical properties required for the product's operating conditions in difficult conditions. The most widely used of them are as follow: artificial aging for 18 hours at 177°C (state T81), heat treatment followed by 8% deformation (T37), artificial ageing at 163°C for 24 hours to state T87, etc.…”

Section: Introductionmentioning

confidence: 99%

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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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Microstructure and Mechanical Properties of Three-Layer TIG-Welded 2219 Aluminum Alloys with Dissimilar Heat Treatments

Cited by 15 publications

References 15 publications

Effects of Post-weld Heat Treatment on Microstructure, Mechanical Properties and the Role of Weld Reinforcement in 2219 Aluminum Alloy TIG-Welded Joints

Effects of Post-weld Heat Treatment on Microstructure, Mechanical Properties and the Role of Weld Reinforcement in 2219 Aluminum Alloy TIG-Welded Joints

Residual Stress Relief for 2219 Aluminum Alloy Weldments: A Comparative Study on Three Stress Relief Methods

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

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