Forming performance of an as-quenched novel aluminum-lithium alloy

Li, Huaguan; Guo, Xunzhong; Wang, Wei; Sun, Zhonggang; Liu, Hongbing; Zheng, Xingwei; Tao, Jie

doi:10.1007/s00170-014-6677-7

Cited by 13 publications

(3 citation statements)

References 28 publications

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“…The average grain size measures approximately 20 μm along the rolling direction and 15 μm along the normal direction. The anisotropy of this sheet is visible from this microstructure; however, some research indicates that the impact of aging time on material properties in all directions is comparable [35]. Hence, in our study, research was restricted to the rolling direction alone.…”

Section: Methodsmentioning

confidence: 87%

Effect of Natural Aging on Cold Forming Performance of 2219 Aluminum Alloy

Shi

et al. 2023

Materials

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To facilitate the manufacturing of the thin-walled components of 2219 aluminum alloy, the quenching–forming–aging (Q–F–A) process has been increasingly utilized. However, natural aging (NA) after quenching significantly affects the cold forming performance of this alloy. In this study, experiments are conducted to investigate the effect of NA time on the cold forming performance of 2219 aluminum alloy. The results indicate that NA can weaken the Portevin–Le Chatelier (PLC) effect, thereby reducing its influence on the cold forming performance of the alloy. The PLC effect becomes indistinct when the aging time reaches 2 years. The yield strength of 2219 aluminum alloy increases monotonically with aging time, while the elongation first increases rapidly and then decreases. After an aging time of 2 years, the yield strength increases by 28.6% from that of newly quenched alloys. The strain hardening index and hardening coefficient indicate that short-term NA (less than 4 days) increases the work hardening rate, while long-term NA reduces it. Microstructural analysis shows that the strengthening effect of NA on 2219 aluminum alloy is mainly due to the growth of G.P. zones and the precipitation of θ″ phases. The NA precipitation behavior can also cause the aggregation of solute atoms and weaken the PLC effect.

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Section: Methodsmentioning

confidence: 87%

Effect of Natural Aging on Cold Forming Performance of 2219 Aluminum Alloy

Shi

et al. 2023

Materials

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“…Lithium is an active metal, which can form an alloy with many metals or nonmetals, such as Si, Sn, Al, Ge, Sb, In, Ag etc. [3][4][5][6][7]. The formation process of lithium alloy is reversible, which increases the amount of lithium storage.…”

Section: Introductionmentioning

confidence: 99%

In situsynthesis of expanded graphite embedded with amorphous carbon-coated aluminum particles as anode materials for lithium-ion batteries

Zhao

Peng

et al. 2020

Nanotechnology Reviews

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AbstractExpanded graphite embedded with amorphous carbon-coated aluminum particle (C@Al–EG) composites were in situ synthesized by chemical vapour deposition (CVD) and ball-milling methods using EG and metallic aluminum as raw materials. Using the characterization and analysis of scanning electron microscopy, X-ray diffraction, alternating current impedance and first charge–discharge curves, the different Al contents in C@Al–EG composites were studied, and the experimental results show that the best performing content for Al was 30 wt%. The C@Al–EG composites exhibited high capacity, excellent cycle stability and rate performance as anode materials for lithium-ion batteries. At a current density of 100 mA h/g, the first reversible capacity of C@Al–EG composites was 401 mA h/g, and the decreasing speed of capacity was slow, with the specific capacity remaining at 381 mA h/g after 50 cycles. The retention rate was up to 95%.

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“…2A97 Al‐Li alloy can be strengthened by natural aging or artificial aging. In general, the solution‐treated aluminum alloys are quenched and formed in a certain time, and then undergo finally natural or artificial aging (Li et al, 2015; Yang, Lai, Zhu, Liu, & He, 2012; Zhang & Chen, 2020; Zhang, Chen, & Ye, 2018). However, during the quenching process, aluminum alloys severely distort and deform, which brings great difficulties to actual manufacturing.…”

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 performance of an as-quenched novel aluminum-lithium alloy

Cited by 13 publications

References 28 publications

Effect of Natural Aging on Cold Forming Performance of 2219 Aluminum Alloy

Effect of Natural Aging on Cold Forming Performance of 2219 Aluminum Alloy

In situsynthesis of expanded graphite embedded with amorphous carbon-coated aluminum particles as anode materials for lithium-ion batteries

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

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