Mechanical behavior and texture development of over-aged and solution treated Al-Cu-Mg alloy during multi-directional forging

Moghanaki, Saeed Khani; Kazeminezhad, M.; Logé, Roland E.

doi:10.1016/j.matchar.2017.11.048

Cited by 24 publications

(9 citation statements)

References 33 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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“…The formation of different textures in differently heat-treated aluminum alloy after MDF process has been reported before as well. It was ascribed to the distinct microchemistry of the matrices and the high density of deformation bands in the solution treated samples since the higher solute content retards dynamic recovery as reported for MDFed over-aged and solution treated Al-Cu-Mg alloy [62].…”

Section: Resultsmentioning

confidence: 99%

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

et al. 2018

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In current research, the effect of the multi-directional forging (MDF) process on the microstructure, texture, mechanical and electrical properties of AA-6063 under different heat treatment conditions at various MDF temperatures was studied. The annealed AA-6063 alloy was processed up to three passes of MDF at ambient temperature. Three passes of this process were also applied to the solution-treated AA-6063 at ambient temperature and 177 °C. Microstructural investigations demonstrated that the MDF process led to a significant reduction in the average grain size as well as a considerable increase in the fraction of low angle grain boundaries. Texture analysis revealed that copper and Goss textures were mainly developed within the annealed and solution-treated samples of AA-6063, respectively. The hardness and shear strength values of all processed samples also showed a sizeable improvement compared to the initial heat-treated samples. For example, the hardness and shear yield strength value of the solution-treated sample MDFed for three passes showed more than 100 and 70% increase, respectively. The effect of the MDF process on the electrical conductivity of AA-6063 under different heat treatment conditions at various temperatures was negligible. So, it can be concluded that the MDF process increased the mechanical properties without an appreciable decrease in electrical conductivity.

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“…Under the severe plastic deformation due to MDF, grains of bulk metal were significantly refined, and its mechanical properties were also remarkably improved. This received considerable attention on many MDF bulk metals, such as AZ31B magnesium alloy [5], AZ61 Mg alloy [6], Mg-Gd-Y-Ag-Zr alloy [7], Mg-Zn-Zr alloy [8], Al-Cu-Mg alloy [9], and so on.…”

Section: Introductionmentioning

confidence: 99%

Changes of Microstructures and Mechanical Properties in Commercially Pure Titanium after Different Cycles of Proposed Multi-Directional Forging

Zheng

Zhang

Xie

et al. 2019

Metals

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A newly proposed multi-directional forging (MDF) was successfully applied to a commercially pure titanium (CP Ti). Severe plastic deformation would result in significant and complex changes of microstructure and mechanical properties, so microstructure characterization and a mechanical test of CP Ti were conducted after different cycles of MDF. The results demonstrated that dynamic recrystallization was the dominant grain refinement mechanism of MDF CP Ti. With increasing the cycles of MDF, grain size, fraction of low angle grain boundaries and dislocations density decreased due to grain refined. After three cycles of MDF, the mean grain size was about 200 nm. The values of tensile strength and hardness increased significantly from zero cycles to one cycle of MDF, but increased slowly after one MDF cycle. Numerous dimples and tear ridges were present, but the dimples were smaller and shallower with increasing cycles of MDF.

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Mechanical behavior and texture development of over-aged and solution treated Al-Cu-Mg alloy during multi-directional forging

Cited by 24 publications

References 33 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

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

Changes of Microstructures and Mechanical Properties in Commercially Pure Titanium after Different Cycles of Proposed Multi-Directional Forging

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