Simultaneously Enhanced Strength and Ductility of Al–Mg–Si Alloys during Aging Process Induced by Electro-Pulsing Treatment

Wang, Yitong; Zhao, Yi; Xu, Xiaofeng; Pan, Dong; Chong, Xueying

doi:10.3390/ma12091383

Cited by 9 publications

(2 citation statements)

References 34 publications

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“…In aluminum alloys, dynamic recovery during hot deformation is known to occur, leading to a dislocation substructure and subgrains with low-angle grain boundaries [30]. Subgrains enhance dislocation density, contributing to increased ductility [31], as observed in the current study for the cast material. The formation of a subgrain structure during the forging of cast AA6061 aluminum alloy was argued to be an important factor in promoting a high strength and especially a high fracture toughness [20,21].…”

Section: Discussionsupporting

confidence: 57%

The Potential of Cast Stock for the Forging of Aluminum Components within the Automotive Industry

Arbo,

Tjøtta,

Boge

et al. 2024

Metals

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In the automotive industry, there is a drive to reduce environmental impact, energy consumption, and costs related to the manufacturing of forged aluminum suspension components. The replacement of extruded stock with cast forging stock is one option that offers substantial potential for such savings. The casting technology, low-pressure casting (LPC), allows for production of high-quality cast forging stock with minimal surface segregation and smaller diameters than those achieved with traditional casting technologies. This study is a proof-of-principle, conducted to directly compare the microstructure and mechanical properties of LPC and extruded material after forging, through both generic and full-scale industrial forging trials. The results show the advantages of the cast material, including higher robustness against surface grain growth after forging and a positive correlation between mechanical properties, both strength and ductility and the introduction of plastic deformation. Overall, the work demonstrates how forged aluminum components produced from LPC forging stock can achieve mechanical properties and performance, on par with extruded forging stock, showcasing industrial relevance through the production of a safety-critical automotive component.

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Section: Discussionsupporting

confidence: 57%

The Potential of Cast Stock for the Forging of Aluminum Components within the Automotive Industry

Arbo,

Tjøtta,

Boge

et al. 2024

Metals

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show abstract

“…Compared with the brass that was subjected to annealing, the grain size of the brass subjected to electric current refined by 75%, and the microhardness enhanced by 28%. Furthermore, electron wind force [16,17] may also be used to refine grains. Electron wind force will contribute to the growth of cellular sub-grains, and the new grain boundaries that formed under electropulsing treatment will eventually consolidate to facilitate grain refining prominently.…”

Section: Introductionmentioning

confidence: 99%

Promoting Dynamic Recrystallization of Al-Zn-Mg-Cu Alloy via Electroshock Treatment

Song

et al. 2023

Metals

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The application of high-strength Al-Zn-Mg-Cu alloy is seriously limited because of its poor formability. A novel electroshock treatment (EST) technique with low frequency combined with tensile deformation was proposed to address the issues of low plasticity and poor formability of Al-Zn-Mg-Cu alloy, which could revolutionize conventional plastic forming methods and realize near-room temperature forming of complex components. Al-Zn-Mg-Cu alloy was examined in this work to figure out how EST affects the tensile characteristics and dynamic recrystallization of the alloy during tensile deformation. The findings demonstrate that when electroshock with a current density of 30 A/mm² and a period of 5 s, the elongation of the alloy increased by 21.74%, and the fraction of dynamic recrystallization increased by 77.56% compared to the sample without EST at a temperature far below the recrystallization temperature. The electron back scatter diffraction (ESBD) results show that after appropriate EST, the average grain size decreased from 40 μm to 30 μm, the distribution of grain was more uniform, and the sample’s grain boundary angle generally increased, which is more attractive to facilitate the nucleation and growth of dynamic recrystallization. Additionally, transmission electron microscopy (TEM) results indicate that electroshock energy motivated the migration of dislocations from the grain interior to near the grain boundaries, improving the ability of Al-Zn-Mg-Cu alloy to dynamically recrystallize at near ambient temperature and enhancing elongation.

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Gradient phase transformation of Al–Zn–Mg–Cu alloy induced by nonlinear interface wetting under electromagnetic shocking treatment

Sun,

Liu,

et al. 2023

J Mater Sci

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Simultaneously Enhanced Strength and Ductility of Al–Mg–Si Alloys during Aging Process Induced by Electro-Pulsing Treatment

Cited by 9 publications

References 34 publications

The Potential of Cast Stock for the Forging of Aluminum Components within the Automotive Industry

The Potential of Cast Stock for the Forging of Aluminum Components within the Automotive Industry

Promoting Dynamic Recrystallization of Al-Zn-Mg-Cu Alloy via Electroshock Treatment

Gradient phase transformation of Al–Zn–Mg–Cu alloy induced by nonlinear interface wetting under electromagnetic shocking treatment

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