Influence of Multi-directional Room-Temperature Forging Process on Microstructure and Mechanical Behaviour of Eutectic Al-12Si Alloy

Kumara, B.; Kumar, Girish

doi:10.1007/s13632-022-00836-z

Cited by 8 publications

(2 citation statements)

References 19 publications

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“…Severe Plastic Deformation (SPD) is very attractive to material scientists in modern days due to the enhancement of the material properties, especially strength by grain refinement without changing the dimensions of the material 5 . SPD methods, such as Equal Channel Angular Pressing (ECAP) 6,7 , High-Pressure Torsion (HPT) 8,9 , Accumulative Roll Bonding (ARB) 10 , Multiaxial Forging (MAF) 11,12 , twist extrusion 13 etc., are popular. Among all SPD methods, multiaxial forging is getting more attention due to ease of operation and this method can be scaled up to small and medium-scale components.…”

Section: Introductionmentioning

confidence: 99%

Effect of Strain Per Pass on Microstructure and Mechanical Properties of Multi-Axially Forged Cast AA5083 Alloy at Room Temperature

Gajula Aravindh,

G. V. Preetham Kumar,

Bhat

2023

jmmf

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This paper investigates the effect of strain per pass over a cycle on, multi-axially forged cast AA5083 alloy at room temperature. To begin with, Multi-Axial Forging (MAF) with two different strains per pass was imposed on the alloy without changing the die geometry. Samples were deformed to cumulative strains of Σɛ = 2.46 (2 Cycles) and Σɛ = 2.79 (3 Cycles), with two different strains per pass ε = 0.41 and ε = 0.31 respectively. Microstructural analysis was carried out by using OM, XRD, and SEM with EDS. Structural changes were characterized, and it was revealed that grain fragmentation was caused by the frequent development of deformation and micro shear bands, which was followed by the evolution of new fine grains in the original grain structure. Mechanical properties were evaluated by tensile, and hardness tests. MAF of ɛ = 0.41 per pass results in high tensile strength and hardness, 428 MPa and 147 Hv; respectively at a cumulative strain of Σɛ =2.46. Processing with strain ɛ = 0.31 per pass produced strength of 380 MPa and hardness of 131 HV after cycle III with a cumulative strain of 2.79. MAF of strain ɛ = 0.41 per pass with cumulative strain of 2.46 resulted in a higher grain refinement structure with increased strength compared to a strain of 0.31 per pass with a cumulative strain of 2.79. Therefore, with the imposition of the high strain per pass produced more grain refinement and consequently higher strength.

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Section: Introductionmentioning

confidence: 99%

Effect of Strain Per Pass on Microstructure and Mechanical Properties of Multi-Axially Forged Cast AA5083 Alloy at Room Temperature

Gajula Aravindh,

G. V. Preetham Kumar,

Bhat

2023

jmmf

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“…However, the high energy consumption of the previously mentioned SPD approaches limits the sample size and industrial application. A promising SPD technique that allows for processing bulk samples while maintaining their geometry is isothermal multidirectional forging (MDF) [13][14][15][16][17]. MDF has been effectively used for achieving outstanding grain-refinement in the Al-based alloys [18,19], by which a grain size of 0.5-2 µm was achieved in 5xxx type alloys [20,21].…”

Section: Introductionmentioning

confidence: 99%

Microstructure Evolution and Constitutive Modelling of Deformation Behavior for Al-Mg-Si-Cu-Sc-Zr Alloy Processed with Isothermal Multidirectional Forging

Mochugovskiy,

Kaplanskaya,

Mosleh

et al. 2023

Applied Sciences

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This research is devoted to the microstructure evolution and deformation behavior of the Al-1.2Mg-0.7Si-1.0Cu-0.1Sc-0.2Zr alloy during the isothermal multidirectional forging (MDF) in a large cumulative strain and temperature range. The structure investigation of the studied alloy revealed several phases precipitated during solidification, among which θ(Al2Cu), Q(Al5Cu2Mg8Si6), Mg2Si, Sc-bearing W(AlScCu) and V(AlSi2Sc2) phases were observed. The MDF at 150–350 °C and a maximum cumulative strain of 14.4 significantly refined grain structure providing a mean grain size of 1.2–2.1 µm. The L12 structured Al3(Sc,Zr) dispersoids with a mean size of 10 ± 1 nm were formed during two-step homogenization annealing. Due to Zener pinning of the nanoscale dispersoids and fine-grained structure, the alloy exhibited near-superplastic behavior in a temperature range of 460–500 °C and strain rate range of 2 × 10−3–1 × 10−2 s−1 with the maximum elongation to failure of ~300%. After a strengthening heat treatment, the forged alloy exhibited the yield strength of 326 ± 5 MPa, ultimate tensile strength of 366 ± 5 MPa, and elongation of 10 ± 3%. The hot deformation behavior was described using the Arrhenius type model. The developed model demonstrated high predictability accuracy with a maximum average absolute relative error of 6.6%.

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Effect of Multi-Axial Room-Temperature Forging on Scratch Hardness and Wear Properties of Hypoeutectic Al-7.3Si and Eutectic Al-12.1Si Alloys

Kumara

Kumar

2023

J. of Materi Eng and Perform

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Influence of Multi-directional Room-Temperature Forging Process on Microstructure and Mechanical Behaviour of Eutectic Al-12Si Alloy

Cited by 8 publications

References 19 publications

Effect of Strain Per Pass on Microstructure and Mechanical Properties of Multi-Axially Forged Cast AA5083 Alloy at Room Temperature

Effect of Strain Per Pass on Microstructure and Mechanical Properties of Multi-Axially Forged Cast AA5083 Alloy at Room Temperature

Microstructure Evolution and Constitutive Modelling of Deformation Behavior for Al-Mg-Si-Cu-Sc-Zr Alloy Processed with Isothermal Multidirectional Forging

Effect of Multi-Axial Room-Temperature Forging on Scratch Hardness and Wear Properties of Hypoeutectic Al-7.3Si and Eutectic Al-12.1Si Alloys

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