Microstructure, Texture, Electrical and Mechanical Properties of AA-6063 Processed by Multi Directional Forging

Dashti, Alireza; Shaeri, M.H.; Taghiabadi, R.; Djavanroodi, F.; Ghazvini, Farzaneh Vali; Javadi, Hamid

doi:10.3390/ma11122419

Cited by 24 publications

(14 citation statements)

References 56 publications

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“…As a result, a bimodal grain size distribution was observed in the central cross-section after IMF at 350 • C and ∑e = 6.3. Similar grain bimodality was observed after multi-directional forging of various aluminum alloys [9,[27][28][29][30][31] and after IMF with a lower strain per pass of 0.4 and a cumulative strain of ∑e = 6.1 in the studied Al-Mg-Mn alloy [43].…”

Section: Grain Structure Evolution At Imfsupporting

confidence: 77%

“…The grain structure consists of very fine grains and coarse grains in pure Al subjected to multi-directional forging at room temperature [25,26]. Similar grain bimodalities are observed in many aluminum-based alloys [9,21,[27][28][29][30][31]. The final grain structure and its homogeneity are 2 of 12 significantly affected by the deformation temperature, cumulative strain and alloy composition [2,[7][8][9][10]20].…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Isothermal Multi-Directional Forging on the Grain Structure, Superplasticity, and Mechanical Properties of the Conventional Al–Mg-Based Alloy

Mikhaylovskaya

Котов

Kishchik

et al. 2019

Metals

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The current study observed a grain structure evolution in the central part and periphery of the sample of an Al–Mg–Mn-based alloy during isothermal multidirectional forging (IMF) at 350 °C with a cumulative strain of 2.1–6.3 and a strain per pass of 0.7. A bimodal grain size distribution with areas of fine and coarse grains was observed after IMF and subsequent annealing. The grain structure, mechanical properties, and superplastic behavior of the samples subjected to IMF with a cumulative strain of 6.3 and the samples exposed to IMF with subsequent cold rolling were compared to the samples exposed to a simple thermo-mechanical treatment. The micro-shear bands were formed inside original grains after the first three passes. The fraction of recrystallized grains increased and the mean size decreased with an increasing cumulative strain from 2.1 to 6.3. Significant improvements of mechanical properties and superplasticity were observed due to the formation of a homogenous fine grain structure 4.8 µm in size after treatment including IMF and subsequent cold rolling.

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Section: Grain Structure Evolution At Imfsupporting

confidence: 77%

Section: Introductionmentioning

confidence: 99%

The Effect of Isothermal Multi-Directional Forging on the Grain Structure, Superplasticity, and Mechanical Properties of the Conventional Al–Mg-Based Alloy

Mikhaylovskaya

Котов

Kishchik

et al. 2019

Metals

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“…No lubrication between sheet and die was used. The applied force was measured in terms of punch displacement, and shear stress was calculated in MPa using the following equation [36,37]:τ=Pπdt ,where P is the punch force in newton, t is the sample thickness, and d is the average diameter of the punch and die in mm. The shear punch test curves were obtained by plotting shear stress vs. normal displacement.…”

Section: Methodsmentioning

confidence: 99%

Effect of Graphene Nanosheets Content on Microstructure and Mechanical Properties of Titanium Matrix Composite Produced by Cold Pressing and Sintering

et al. 2018

Self Cite

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The effect of graphene nanosheet (GNS) reinforcement on the microstructure and mechanical properties of the titanium matrix composite has been discussed. For this purpose, composites with various GNS contents were prepared by cold pressing and sintering at various time periods. Density calculation by Archimedes’ principle revealed that Ti/GNSs composites with reasonable high density (more than 99.5% of theoretical density) were produced after sintering for 5 h. Microstructural analysis by X-ray diffraction (XRD) and a field emission scanning electron microscope (FESEM) showed that TiC particles were formed in the matrix during the sintering process as a result of a titanium reaction with carbon. Higher GNS content as well as sintering time resulted in an increase in TiC particle size and volume fraction. Microhardness and shear punch tests demonstrated considerable improvement of the specimens’ mechanical properties with the increment of sintering time and GNS content up to 1 wt. %. The microhardness and shear strength of 1 wt. % GNS composites were enhanced from 316 HV and 610 MPa to 613 HV and 754 MPa, respectively, when composites sintered for 5 h. It is worth mentioning that the formation of the agglomerates of unreacted GNSs in 1.5 wt. % GNS composites resulted in a dramatic decrease in mechanical properties.

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“…Followed by extrusion, the produced bar samples were cut and machined to prepare the required samples for the MDF process with the dimensions of 10 × 10 × 15 mm 3 . MDF was performed in a two-side closed forging die with the detail conditions described in previous works [14]. The schematic of MDF process used in current research is represented in Fig.…”

Section: Methodsmentioning

confidence: 99%

“…It can be performed at various temperatures, strains, and strain-rates according to the dimensions of die and sample [13]. The ability to control the amount of plastic strain in each pass and repeatability of the process are among the principal advantages of this method [14]. Also, by considering a high potential of this method for the production of large samples, it can be utilized on an industrial scale.…”

Section: Introductionmentioning

confidence: 99%

Investigating the combination effect of warm extrusion and multi-directional forging on microstructure and mechanical properties of Al–Mg2Si composites

Sharifzadeh

Shaeri

Taghiabadi

et al. 2020

Archiv.Civ.Mech.Eng

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The combined effect of extrusion and multi-directional forging (MDF) was investigated on microstructure and mechanical properties of aluminum-based composite with 10, 15, and 20 wt% Mg 2 Si. In the casted Al-Mg 2 Si composites, the primary and eutectic Mg 2 Si particles are generally coarse which lead to decreasing their mechanical properties and formability. Extrusion process was utilized to overcome this shortcoming by breakage of the eutectic structure, reduction of Mg 2 Si size, and the decrease of casting defects. Then, MDF process was applied up to failure on the extruded composites at room temperature. It led to the morphological modification of primary and eutectic Mg 2 Si phases and the reduction of their size. It was found that the MDF process resulted in a considerable improvement in hardness and shear strength of materials. This may be related to the reduction in the average size of Mg 2 Si particles with their uniform distribution. In addition, ultimate shear strength is, respectively, increased from 94, 99, and 81 MPa to 119, 116, and 117 MPa for the 10, 15, and 20 wt% Mg 2 Si aluminum composites after the final pass of MDF. Meanwhile, the normal displacement of composites is reduced at initial passes and increased by the addition of more pass numbers.

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Microstructure, Texture, Electrical and Mechanical Properties of AA-6063 Processed by Multi Directional Forging

Cited by 24 publications

References 56 publications

The Effect of Isothermal Multi-Directional Forging on the Grain Structure, Superplasticity, and Mechanical Properties of the Conventional Al–Mg-Based Alloy

The Effect of Isothermal Multi-Directional Forging on the Grain Structure, Superplasticity, and Mechanical Properties of the Conventional Al–Mg-Based Alloy

Effect of Graphene Nanosheets Content on Microstructure and Mechanical Properties of Titanium Matrix Composite Produced by Cold Pressing and Sintering

Investigating the combination effect of warm extrusion and multi-directional forging on microstructure and mechanical properties of Al–Mg2Si composites

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