Strengthening behavior of Al–Cu–Mg alloy sheet in hot forming–quenching integrated process with cold–hot dies

Fan, Xiaobo; Zhang, He; Zheng, Kailun; Yuan, Shijian

doi:10.1016/j.matdes.2015.06.058

Cited by 47 publications

(23 citation statements)

References 21 publications

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“…Rapid quenching is finished to avoid the formation of coarse precipitates and to restrict the thermal distortion during quenching. They studied the effect of mold temperature on microstructure evolution and mechanical properties [13][14][15][16][17]. The study on the effects of forging speed during die-quench forging process on deformation and aging behavior of Al 6xxx reports that die-quench forging at slow speed led to lower deformation temperature, larger temperature gradient and weaker ageing hardening [18].…”

Section: Introductionmentioning

confidence: 99%

“…Wang et al and Mohamed et al reported the formability and failure features in die quenching of AA6082 and AA2024 alloys [19,20]. In these methods the alloys were deformed and quenched simultaneously and the alloys were subjected to natural ageing or artificial ageing for precipitation strengthening [15]. The hot forming-quenching process is an efficient way to produce metal parts with high strength and plasticity.…”

Section: Introductionmentioning

confidence: 99%

“…On one hand, dynamic recovery was observed and resulted in improved plasticity [21]. On the other hand, precipitation strengthening during hot forming and artificial ageing improved strength [15]. The deformation temperature is essential to control the microstructure and mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Preheating Temperature on the Microstructure and Tensile Properties of 6061 Aluminum Alloy Processed by Hot Rolling-Quenching

Zhao

Shan

Geng

et al. 2019

Metals

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The present work investigates the microstructure and tensile properties of a hot rolled 6061 alloy quenched by cold rolls (RQ) at different preheating temperatures. The preheating temperature strongly affects microstructure evolution and mechanical properties. Low preheating temperature (490 °C) resulted in both low strength and low elongation. The RQ alloy preheated at 540 °C exhibited improved ductility compared to those subjected to T6 and T8 temper, and comparable strength to that after T8 temper. The dynamic recovery during hot rolling contributed to the improved tensile elongation and retained work hardening. High preheating temperature also led to pronounced ageing hardening during short-term ageing.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Preheating Temperature on the Microstructure and Tensile Properties of 6061 Aluminum Alloy Processed by Hot Rolling-Quenching

Zhao

Shan

Geng

et al. 2019

Metals

View full text Add to dashboard Cite

show abstract

“…Chen et al (Chen, Chen, Wang, et al, 2016) adopted the hot forming process with synchronous cooling for AA2024 alloy, which reduced springback, eliminated warp distortion, and improved the dimension accuracy. Fan et al (Fan, He, Yuan, & Lin, 2013; Fan, He, Zheng, & Yuan, 2015) combined hot forming and quenching together to improve the formability of Al‐Cu‐Mg and 6A02 aluminum alloy, to achieve enough strength and formability simultaneously.…”

Section: Introductionmentioning

confidence: 99%

Mechanisms and microstructures of 2A97 Al‐Li alloy under the hot forming with synchronous quenching process

Zhang

Chen

et al. 2020

Microscopy Res & Technique

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Aluminum‐lithium alloy is regarded as the most promising light material in the aircraft and aerospace industries. For the production of complex and high‐precision parts, the hot forming with synchronous quenching (HFSQ) process has become an effective and attractive forming method. In order to achieve the performance and microstructure evolution of the 2A97 Al‐Li alloy under the HFSQ process, the specimens were subjected to solution treatment at 520°C and held at 90 min in the Gleeble 3,500 thermal simulator. Then the hot tensile test with simultaneous quenching was conducted directly at a temperature of 300–500°C and a strain rate of 0.1–0.001 s−1 with the same equipment. Through analyzing the macroscopic stress–strain curves and microscopic fractures, it was concluded that the optimal forming temperature was 450°C with the strain rate being 0.1 s−1 and its forming mechanism under the process was presented. To obtain the microstructure evolution of 2A97 Al‐Li alloy under the HFSQ process, the material was subjected to constant strain tensile test with synchronous quenching and then treated with two‐stage artificial aging 200°C and 6 hr + 165°C and 6 hr. The microstructure of the alloy was observed by means of electron backscattering diffraction (EBSD). And its evolution process and the influence of temperature, strain rate, and strain on the microstructure under the process were attained.

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“…Forming at elevated temperature is a promising solution, because of the reduced flow stress, increased ductility, and increased toughness of the material compared with cold forming [3]. Hot forming processes, such as superplastic forming [4], quick plastic forming [5], and hot form and quench [6,7], have been developed to manufacture components with complex shapes and high dimensional accuracy. However, the material flow behavior is often complex during hot deformation, which is significantly affected by processing parameters, i.e., the strain, strain rate, and temperature [8,9].…”

Section: Introductionmentioning

confidence: 99%

Hot Deformation Behavior of a 2024 Aluminum Alloy Sheet and its Modeling by Fields-Backofen Model Considering Strain Rate Evolution

Zhang

Wang

Lin

et al. 2019

Metals

Self Cite

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The deformation behavior of a 2024 aluminum alloy sheet at elevated temperatures was studied by uniaxial hot tensile tests over the nominal initial strain rate range of 0.001–0.1 s−1 and temperature range of 375–450 °C. In order to analyze the deformation behavior with higher accuracy, a digital image correlation (DIC) system was applied to determine the strain distribution during hot tensile tests. Local stress-strain curves for different local points on the specimens were calculated. The strain rate evolution of each point during the tensile tests was investigated under different deformation conditions. Then, an improved Fields–Backofen (FB) model, taking into account the local strain rate evolution instead of the fixed strain rate, was proposed to describe the constitutive behaviors. It has been found that obvious non-uniform strain distribution occurred when the true strain was larger than 0.3 during hot tensile tests. The strain rate distribution during deformation was also non-uniform. It showed increasing, steady, and decreasing variation tendencies for different points with the increasing of strain, which led to the local flow stress being different at different local points. The flow stresses predicted by the improved FB model showed good agreement with experimental results when the strain rate evolutions of local points during tensile tests were considered. The prediction accuracy was higher than that of traditional FB models.

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Strengthening behavior of Al–Cu–Mg alloy sheet in hot forming–quenching integrated process with cold–hot dies

Cited by 47 publications

References 21 publications

Effect of Preheating Temperature on the Microstructure and Tensile Properties of 6061 Aluminum Alloy Processed by Hot Rolling-Quenching

Effect of Preheating Temperature on the Microstructure and Tensile Properties of 6061 Aluminum Alloy Processed by Hot Rolling-Quenching

Mechanisms and microstructures of 2A97 Al‐Li alloy under the hot forming with synchronous quenching process

Hot Deformation Behavior of a 2024 Aluminum Alloy Sheet and its Modeling by Fields-Backofen Model Considering Strain Rate Evolution

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