Effect of Mn/Cr ratio on precipitation behaviors of α-Al(FeMnCr)Si dispersoids and mechanical properties of Al–Mg–Si–Cu alloys

Liu, Fangzhen; Zhu, Xin‐Guang; Qin, Jian; Zhou, Wei; Ling, Jianquan; Dong, Qipeng; Yu, Jingyi; Nagaumi, Hiromi; Zhang, Bo

doi:10.1016/j.msea.2022.144269

Cited by 17 publications

(4 citation statements)

References 36 publications

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“…Rakhmonov et al [14] found that in the Mn-free alloy, full recrystallization occurred during extrusion, while the presence of dispersoids resulted from the Mn alloying effectively impeded or suppressed recrystallization. Earlier study has shown that an appropriate Mn/Cr ratio (3.5) facilitated the precipitation of numerous fine dispersoids, thereby enhancing dispersion strengthening and Zener drag PZ [15]. With the addition of Mo, the size of dispersoids became finer along with the increased volume fraction [16].…”

Section: Introductionmentioning

confidence: 98%

Effect of Cu on the Precipitation of α-Al(Mn,Cr)Si Dispersoids in an Al-Mg-Si-Mn-Cr Alloy

Liu,

Dong,

Qin

et al. 2023

SSP

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Nanoscale dispersoids will retard or inhibit recrystallization of aluminum alloys during thermomechanical processes. In the present study, the influence of an addition of 0.6 wt. % Cu on the precipitation behavior of dispersoids in an Al-Mg-Si-Mn-Cr alloy had been investigated. Large amounts of dispersoids with different shapes, e.g. cubic, rod-like and plate-like, were achieved in the experimental alloys after homogenization. Compared with the Cu-free alloy, Cu-added alloy exhibits a higher proportion of cubic shape dispersoid. HRTEM results indicated that the cubic shape dispersoid has an icosahedral quasicrystal structure, while the rod-like or plate-like shape dispersoids show a simple cubic crystal structure. Due to the presence of a high number density of quasicrystalline dispersoids, the Cu-added alloy exhibits a higher recrystallization resistance during hot compression. This study presents a new insight that besides the precipitation strengthening, the Cu alloying in an Al-Mg-Si-Mn-Cr alloy can also contributes to the precipitation of dispersoids.

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Section: Introductionmentioning

confidence: 98%

Effect of Cu on the Precipitation of α-Al(Mn,Cr)Si Dispersoids in an Al-Mg-Si-Mn-Cr Alloy

Liu,

Dong,

Qin

et al. 2023

SSP

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“…A recent work reports the analysis of variables like that of this study, which are the effect of variations in the Mn/Cr ratios (0.5-8) on the precipitation behavior of dispersoids in 6XXX series aluminum alloys, with homogenization thermal treatment at different temperatures 500, 530, and 560 • C and residence times of 0-24 h [21]. Another study analyzed the individual and synergistic effects of Mn and Cu on the microstructure evolution and mechanical properties [22].…”

Section: Introductionmentioning

confidence: 99%

Effect of the Fe/Mn Ratio on the Microstructural Evolution of the AA6063 Alloy with Homogenization Heat Treatment Interruption

Avalos,

Torres,

Flores Valdés

2024

Metals

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The casting structure of the AA6063 alloy contains intermetallic particles of β-Al5FeSi, which can result in the fragility of the cast pieces. However, with heat treatment, the β phase transforms from a needle or plate form into an intermetallic phase known as α, which resembles Chinese-script in its morphology. To analyze the effect of the ratio of Fe/Mn with different ratios of 0.5, 0.75, and 1, a heat treatment process is used with intermittent interruptions. The alloy is subjected to a temperature of 575 °C for 12 h to determine the microstructural evolution of the β-Al6FeMn and α-Al15(FeMn)3Si2 phases. This study used scanning electron microscopy to conduct point analyses and elemental mappings of the intermetallics found in the casting and heat treatment samples. Additionally, X-ray diffraction was employed to determine the stoichiometry of the present phases. The results indicated that the cast structure contains β-Al6FeMn and α-Al15(FeMn)3Si2 phases and that the β-Al6FeMn phase transforms into the α-Al15(FeMn)3Si2 phase upon completion of the heat treatment process. By using specific Fe/Mn ratios, the formation of the needle-shaped Al5FeSi phase in the casting structure of the alloy can be inhibited, leading to the precipitation of phases such as β-Al6FeMn and α-Al15(FeMn)3Si2 instead.

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“…To provide for the formation of nanoscale precipitates (dispersoids), the aluminum is usually alloyed with transition metals (TM), including rare earth (RE) metals [61][62][63][64][65]. These elements predominately have extremely low solubility in aluminum.…”

Section: Introductionmentioning

confidence: 99%

Particle Stimulated Nucleation Effect for Al-Mg-Zr-Sc Alloys with Ni Addition during Multidirectional Forging

Kishchik,

Mochugovskiy,

Cuda

et al. 2023

Metals

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The study aims to investigate the influence of fraction of coarse undeformed particles on the microstructure evolution and mechanical properties of alloys processed by isothermal multidirectional forging (MDF). For this purpose, Al-Mg-Ni-Sc-Zr-based alloys with different Ni concentrations and a fraction of Al3Ni particles of solidification origin phase were subjected to MDF at 350 °C. Precipitates of the L12-structured Al3(Sc,Zr) phase retained their structure, morphology, and size after MDF and were coherent with the aluminum matrix. The Al3Ni phase particles stimulated the nucleation of recrystallized grains and contributed significantly to the formation of an ultrafine-grained structure. The uniformity of the grain structure increased, and the average grain size decreased with an increase in the fraction of Al3Ni particles. A fine-grained structure with a mean grain size of 2.4–3.4 µm was observed after MDF with a cumulative strain of 12. The results demonstrate that a bimodal particles size distribution with a volume fraction of nanoscale f~0.1% and microscale f~8% particles provided for the formation of a homogenous fine-grained structure after MDF and improved the mechanical properties.

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Effect of Mn/Cr ratio on precipitation behaviors of α-Al(FeMnCr)Si dispersoids and mechanical properties of Al–Mg–Si–Cu alloys

Cited by 17 publications

References 36 publications

Effect of Cu on the Precipitation of α-Al(Mn,Cr)Si Dispersoids in an Al-Mg-Si-Mn-Cr Alloy

Effect of Cu on the Precipitation of α-Al(Mn,Cr)Si Dispersoids in an Al-Mg-Si-Mn-Cr Alloy

Effect of the Fe/Mn Ratio on the Microstructural Evolution of the AA6063 Alloy with Homogenization Heat Treatment Interruption

Particle Stimulated Nucleation Effect for Al-Mg-Zr-Sc Alloys with Ni Addition during Multidirectional Forging

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