Microstructures evolution of nano TiB2/7050Al composite during homogenization

Liu, Gen; Geng, Jiwei; Li, Yugang; Cai, Ling; Chen, Dong; Wang, Mingliang; Ma, Naiheng; Wang, Haowei

doi:10.1016/j.matchar.2019.110019

Cited by 18 publications

(2 citation statements)

References 32 publications

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“…XRD peaks are calibrated and it can be considered that the phase structure consists of α(Al) and η(MgZn2) in as-cast alloys. The study of Xu [5] declared that the lattice structure of the AlZnMgCu phase is similar with MgZn2 phase. They all exhibit a hexagonal structure.…”

Section: Microstructure and Dsc Analysis Of As-cast Al-zn-mg-cu Alloysmentioning

confidence: 97%

“…Zn and Mg elements, as the main compositions, significantly affect the microstructure and properties of Al-Zn-Mg-Cu alloy [3,4]. Additionally, different Zn and Mg contents may even change the type of intermetallic phases in ascast Al-Zn-Mg-Cu alloy [5]. In general, increasing Zn content can make more MgZn2 phase precipitate from the matrix, thereby increasing the strength of alloys.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Zn/Mg Ratio on Microstructure Evolution of Al-Zn-Mg-Cu Alloys during Homogenization

Yin

et al. 2022

KEM

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The effect of Zn/Mg ratio on the as-cast microstructure and its evolution during homogenization of Al-Zn-Mg-Cu alloys was investigated by optical microscopy (OM), differential scanning calorimetry (DSC), scanning electron microscope (SEM) and X-ray diffraction (XRD). Experimental results showed that serious dendritic segregation existed in the as-cast microstructures while the second phases were mainly AlZnMgCu phase and Al2Cu phase. With the Zn/Mg ratio increasing from 1.5 to 2.0, the area fraction of AlZnMgCu phase decreased from 2.85% to 2.53%, which was attributed to the content of Mg element. Non-equilibrium eutectic phases dissolved into the matrix during homogenization and phase transformation from AlZnMgCu phase to Al2CuMg phase (S phase) was observed in low-Zn/Mg ratio alloy and mid-Zn/Mg ratio alloy. In the high Zn/Mg ratio alloy, the eutectic AlZnMgCu phase directly dissolved into the matrix during the homogenization, and no transformation from AlZnMgCu phase to S phase was found. A higher number of S phases appeared in low-Zn/Mg ratio alloy during homogenization treatment compared with mid-Zn/Mg ratio alloy with a regime of 465°C/24h. It could be inferred that low-Zn/Mg ratio alloys had a stronger phase transformation tendency from AlZnMgCu phase to S phase. Increasing the homogenization treatment temperature could impair the transition tendency from AlZnMgCu phase to S phase.

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Section: Microstructure and Dsc Analysis Of As-cast Al-zn-mg-cu Alloysmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Effect of Zn/Mg Ratio on Microstructure Evolution of Al-Zn-Mg-Cu Alloys during Homogenization

Yin

et al. 2022

KEM

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Microstructure Evolution and Mechanical Properties of In Situ TiB₂/Al–Zn–Mg–Cu Composites by Electropulsing‐Assisted Solution Treatment

Chen,

Luo,

Geng

et al. 2024

Adv Eng Mater

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The traditional solution treatment is not completely applicable for in situ TiB2/Al–Zn–Mg–Cu composite due to the influence of TiB2 particles. This study investigates the impact of the electropulsing‐assisted solution (EAS) process on the microstructure evolution and mechanical properties of TiB2/Al–Zn–Mg–Cu composites. The nonuniform microstructure evolution related to the difference in temperature and current density is supported by simulative and experimental results. EAS treatment significantly enhances the degree of supersaturation, allowing phases surrounding TiB2 particles to dissolve without extensive overburning, unlike traditional solution treatments. This improvement is attributed to the reduced thermodynamic barrier and accelerated atomic diffusion, facilitated by both localized and average Joule heating effects and enhanced thermal electron/phonon scattering. Meanwhile, grain size remains stable during the temperature rise induced by EAS treatment. Furthermore, the mechanical properties of composites increase, among which the increase in strength is mainly ascribed to solid–solution strengthening, and the increase in elongation is related to multiple factors referring to TiB2 particles fracture and interface crack between the undissolved phases and matrix. This study provides an approach to achieve an efficient dissolution of phases aggregated with particles and without widespread overburning in particle‐reinforced Al matrix composites via electropulsing techniques.

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Technical performance of co-addition of SiC particulates and SiC whiskers in hot-pressed TiB2-based ultrahigh temperature ceramics

Yan

Foong

Lyu

2020

Ceramics International

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Microstructures evolution of nano TiB2/7050Al composite during homogenization

Cited by 18 publications

References 32 publications

Effect of Zn/Mg Ratio on Microstructure Evolution of Al-Zn-Mg-Cu Alloys during Homogenization

Effect of Zn/Mg Ratio on Microstructure Evolution of Al-Zn-Mg-Cu Alloys during Homogenization

Microstructure Evolution and Mechanical Properties of In Situ TiB₂/Al–Zn–Mg–Cu Composites by Electropulsing‐Assisted Solution Treatment

Technical performance of co-addition of SiC particulates and SiC whiskers in hot-pressed TiB2-based ultrahigh temperature ceramics

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Microstructures evolution of nano TiB2/7050Al composite during homogenization

Cited by 18 publications

References 32 publications

Effect of Zn/Mg Ratio on Microstructure Evolution of Al-Zn-Mg-Cu Alloys during Homogenization

Effect of Zn/Mg Ratio on Microstructure Evolution of Al-Zn-Mg-Cu Alloys during Homogenization

Microstructure Evolution and Mechanical Properties of In Situ TiB2/Al–Zn–Mg–Cu Composites by Electropulsing‐Assisted Solution Treatment

Technical performance of co-addition of SiC particulates and SiC whiskers in hot-pressed TiB2-based ultrahigh temperature ceramics

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About

Microstructure Evolution and Mechanical Properties of In Situ TiB₂/Al–Zn–Mg–Cu Composites by Electropulsing‐Assisted Solution Treatment