Tuning homogenization of high-strength aluminum alloys through thermodynamic alloying approach

Wang, Yawen; Hou, Longgang; Shen, Hui; Tian, Qingkun; Yu, Kangcai; Eskin, Dmitry; Katgerman, L.; Zhuang, Linzhong

doi:10.1016/j.matdes.2022.110975

Cited by 8 publications

(4 citation statements)

References 93 publications

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“…Previous SEM observations studying Si phase morphology at various solid solution times revealed necking and dissolution within the eutectic Si phase, particularly prevalent at the branches and sites with preexisting “necking.” These areas often exhibit Si atomic disorder, creating an uneven distribution of energy states. [ 31 ] Throughout the heat‐treatment process, these regions tend to dissolve initially, gradually rounding and purifying the ends and forks of the Si phase. This comprehensive transformation within the eutectic Si phase results from the combined effects of thermal action and curvature, aimed at reducing surface energy and altering the Si phase morphology.…”

Section: Discussionmentioning

confidence: 99%

“…These areas often exhibit Si atomic disorder, creating an uneven distribution of energy states. [31] Throughout the heat-treatment process, these regions tend to dissolve initially, gradually rounding and purifying the ends and forks of the Si phase. This comprehensive transformation within the eutectic Si phase results from the combined effects of thermal action and curvature, aimed at reducing surface energy and altering the Si phase morphology.…”

Section: Phase Evolution Of Homogenized Aluminum Alloymentioning

confidence: 99%

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Effect of Homogenization Process on Microstructure and Mechanical Properties of 4047 Aluminum Alloy

Cheng,

Huang,

Zhang

et al. 2024

Adv Eng Mater

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This study investigated the homogenization heat treatment process and microstructural evolution of 4047 aluminum alloy. The results revealed that the homogenization process induced partial dissolution of metastable phases and modification of the fine needle‐shaped eutectic Si. Within the 4047 aluminum alloy, the fine needle‐shaped eutectic Si underwent granulation, involving two stages: crystal dissolution and granulation of broken crystals. After optimal homogenization heat treatment, the eutectic Si phase transformed from a fine needle‐shaped structure to small, regular spherical structures, reducing stress concentration and improving the interfacial bonding capability and internal structure of the alloy matrix. This significantly reduces the likelihood of microcrack formation within the alloy and effectively hinders crack propagation, enhancing the alloy’s mechanical properties.This article is protected by copyright. All rights reserved.

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Section: Discussionmentioning

confidence: 99%

Section: Phase Evolution Of Homogenized Aluminum Alloymentioning

confidence: 99%

Effect of Homogenization Process on Microstructure and Mechanical Properties of 4047 Aluminum Alloy

Cheng,

Huang,

Zhang

et al. 2024

Adv Eng Mater

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“…Al3Fe Phase in area b was formed possibly due to impurities from the casting process where the stir casting tool was made from stainless steel containing Fe. Phase Al + MgZn2 (η) area c was the eutectic phase, which was the primary phase 26,27) . The SEM-EDS observation for forged samples was taken from the 0.15 vf% nano-SiC due to the good result (Figure 13a).…”

Section: Microstructure Observationmentioning

confidence: 99%

Characteristic of AA 7075-Reinforced Nano-SiC Composites Produced by Stir-Squeeze Casting and Open Die Cold Forging as An Armor Material Candidate

Adityawardhana¹,

Syahrial²,

Adjiantoro³

2023

Evergreen

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This study presented the ballistic properties and impact strength of the aluminum alloy AA 7075-reinforced nano-SiC composites, which were produced by stir-squeeze casting and forging processes. Ballistic tests revealed that the samples met the National Institute of Justice (NIJ) Type II standard, except for samples that were not forged. The other characteristics examined were microstructural observations analyzed using optical and scanning electron microscopes. As a result of the pinning effect, the microstructure of the samples showed a decrease in grain size as the SiC content increased, except for samples with over 0.25 vf% of nano-SiC. This effect was observed in samples with and without forging. The forging process decreased grain size further, affecting ballistic and mechanical properties. The addition of 0.3 vf% nano-SiC improved the ballistic properties and impact strength, resulting in the highest impact value of 7.7 J, despite higher values of the average ballistic diameter of perforation (about 4.7 mm) and average indentation depth (about 17.22 mm) measured on this sample.

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“…Among these methods, castings produced by squeeze-casting exhibit a good surface quality, a high dimensional accuracy, and a high consistency, making it an economical and efficient method suitable for producing large-size precision products. The mechanical properties of these castings are usually superior to those produced by traditional methods, and they are even close to forged pieces [8,9].…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Squeeze-Casting SiC3D/Al Ceramic Matrix Composites

Wang,

Zhang,

Feng

et al. 2024

Metals

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In this study, the filling and solidification processes of squeeze-casting SiC3D/Al composites were analyzed by the ProCAST simulation software (ver. 2018.0). A practical squeeze-casting experiment was conducted to verify the accuracy of the simulation results. A series of orthogonal experiments were conducted on the initial preheating temperature of various components to identify the optimal parameters in order to achieve better porosity and stress concentration values. According to the results and analyses, the preheating temperature of the mold was the most important determining factor. Under a pouring temperature of 700 °C, mold preheating temperature of 200 °C, and SiC skeleton preheating temperature of 600 °C, the maximum principal stress at the bottom of the products was decreased by about 41.9%, and the shrinkage volume inside the composite was decreased about by about 61.6%. Thus, by adjusting the initial preheating temperature of various components, the squeeze-casting SiC3D/Al composites could achieve better performance and fewer internal defects.

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Tuning homogenization of high-strength aluminum alloys through thermodynamic alloying approach

Cited by 8 publications

References 93 publications

Effect of Homogenization Process on Microstructure and Mechanical Properties of 4047 Aluminum Alloy

Effect of Homogenization Process on Microstructure and Mechanical Properties of 4047 Aluminum Alloy

Characteristic of AA 7075-Reinforced Nano-SiC Composites Produced by Stir-Squeeze Casting and Open Die Cold Forging as An Armor Material Candidate

Numerical Simulation of Squeeze-Casting SiC3D/Al Ceramic Matrix Composites

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