Effect of multi-directional hot forging process on the microstructure and mechanical properties of Al–Si based alloy containing high amount of Zn and Cu

Alemdağ, Yasin; Karabıyık, Sadun; Mikhaylovskaya, A. V.; Kishchik, Mikhail S.; Pürçek, G.

doi:10.1016/j.msea.2020.140709

Cited by 14 publications

(6 citation statements)

References 45 publications

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“…The second homogenization annealing step provided for a noticeable fragmentation of the Al 3 Ni phase. The fragmentation and spheroidization of the eutectic particles during the heat treatment provided for a uniform particle distribution after thermomechanical treatment that agreed with [84]. The second homogenization step may also accelerate the precipitation kinetics [83,85] of the L1 2 phase.…”

Section: Discussionmentioning

confidence: 54%

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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Section: Discussionmentioning

confidence: 54%

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 values presented in Table 2 are informative only, and the actual values of mechanical properties of Al-Si-based alloys can vary depending on various factors such as the composition of the alloy, the manufacturing process, and the testing conditions [34,35].…”

Section: Aluminum Alloys and Their Range Of Physical And Mechanical P...mentioning

confidence: 99%

Analysis of Selected Production Parameters for the Quality of Pressure Castings as a Tool to Increase Competitiveness

Ružbarský

Gašpár

2023

Applied Sciences

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The research conducted in the paper highlights the importance of pressure or holding pressure in the mold cavity as a critical production parameter in the high-pressure die casting process for Al-Si alloys. The experiments revealed a direct correlation between the pressure or holding pressure in the mold cavity and the mechanical properties of the castings, including ultimate tensile strength, percentage share of porosity, and the structure of the alloys. The results of the experiments showed that increasing the pressure or holding pressure in the mold cavity led to an increase in ultimate tensile strength and a reduction in the porosity of the castings. The higher pressure or holding pressure also resulted in the elimination of pores in the casting, which further improved its mechanical properties. The increase in ultimate tensile strength and reduction in porosity can be attributed to the better filling of the mold cavity, leading to reduced air entrapment and porosity in the castings. Overall, this paper emphasizes the need for optimizing the technological parameters of the die casting process to ensure the high-quality and efficient production of castings with reduced defects. The results of this study suggest that controlling the pressure or holding pressure in the mold cavity can significantly improve the mechanical properties of the castings, which is essential for achieving the desired quality standards.

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“…In recent years, there has been a clear trend in the development of forging in the direction of studying processes related to the so-called multidirectional forging, which is a hybrid combination of conventional free forging and hot forging [6][7][8][9]. A key feature of this process is the fact that due to the complicated metal flow, the presence of tilts at 90°, and sometimes at 45°, deformation of the entire workpiece in one cycle or with a certain number of feeds, these technologies cannot be attributed either to forging or to stamping operations.…”

Section: Analysis Of the Current State Of Blacksmith Production In Th...mentioning

confidence: 99%

Methods for Improving the Quality of Forgings and Blanks Obtained by Forging through Intensifying Shear or Alternating Strain in the Bulk of Deformable Metal

2023

Prog. Phys. Met.

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The article presents methods for improving the quality of forgings and workpieces obtained by forging by intensifying shear or alternating strain in the bulk of the deformed metal. To increase the metal processing due to shear or alternating strain during forging, forging strikers are most often used, the feature of which is the geometric configuration that creates additional metal flows. Quite a lot of works from research teams from all over the world have been devoted to the problem of intensive metal processing during forging. In these publications, a number of new unique designs of strikers have been proposed and various route technologies have been considered, which can significantly increase the level of shear or alternating strain compared with the use of traditional forging tool designs.

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Effect of multi-directional hot forging process on the microstructure and mechanical properties of Al–Si based alloy containing high amount of Zn and Cu

Cited by 14 publications

References 45 publications

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

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

Analysis of Selected Production Parameters for the Quality of Pressure Castings as a Tool to Increase Competitiveness

Methods for Improving the Quality of Forgings and Blanks Obtained by Forging through Intensifying Shear or Alternating Strain in the Bulk of Deformable Metal

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