Friction stir processing of an aluminum-magnesium alloy with pre-placing elemental titanium powder: In-situ formation of an Al3Ti-reinforced nanocomposite and materials characterization

Khodabakhshi, F.; Simchi, A.; Kokabi, A.H.; Gerlich, A.P.

doi:10.1016/j.matchar.2015.08.016

Cited by 80 publications

(37 citation statements)

References 74 publications

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“…Formation of nanosized reaction products with coherent or semicoherent interfaces can enhance mechanical properties. Various hybrid aluminium matrix nanocomposites were fabricated by FSP using Al–CeO 2 (Chen et al ., ), Al–TiO 2 (Khodabakhshi et al ., , Zhang et al ., , Zhang et al ., ), Al–CuO (You et al ., ) and Al–Fe 2 O 3 (Azimi‐Roeen et al ., ) systems, where in situ formation of Al 2 O 3 particles occurred by reactive mechanisms. However, because FSP interaction time is limited, the reaction may not be completed.…”

Section: Introductionmentioning

confidence: 99%

EBSD investigation of Al/(Al₁₃Fe₄+Al₂O₃) nanocomposites fabricated by mechanical milling and friction stir processing

Azimi-Roeen

Kashani-Bozorg

Nosko

et al. 2017

Journal of Microscopy

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The application of ball-milling for reactant powders (Fe O +Al) to form in situ nanosized reaction products in the stir zone of 1050 aluminium alloy was examined and the evolution of microstructure, grain boundaries and microtexture of the fabricated Al/(Al Fe +Al O ) nanocomposite was investigated. The mean matrix grain size of the fabricated nanocomposites by the combination of ball milling and friction stir processing were found to be ∼3.2, 3.1 and 2.1 μm for 1, 2 and 3 h milled powder mixtures, respectively. The fraction of high-angle grain boundaries increased markedly in the stir zone indicating the occurrence of dynamic restoration of the aluminium matrix. This was also associated with increasing of the fraction of low ∑CSL boundaries. In addition, the fraction of high-angle grain boundaries increased as the reaction product increased. The developed textures were compared with the most important deformation and recrystallisation texture components of cubic close packed structure. Some of the main texture components formed due to the restoration of aluminium in the stir zone of the material with no powder addition were Cube {001}<310>, BR {236}<385> and R (or retained S{123} <634>); these are usually found in the rolled materials. However, the presence of nanosized reaction products in the fabricated nanocomposite changed the texture components to the dominant Goss {011}<100>, P {011}<122> and R{124}<211> textures.

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Section: Introductionmentioning

confidence: 99%

EBSD investigation of Al/(Al₁₃Fe₄+Al₂O₃) nanocomposites fabricated by mechanical milling and friction stir processing

Azimi-Roeen

Kashani-Bozorg

Nosko

et al. 2017

Journal of Microscopy

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“…Metallic reinforcements have several advantages over conventional reinforcing ceramic particulates, including easy and economical availability [35,36], improved recyclability of MMCs [37], better compatibility with a metallic matrix in terms of coefficient of thermal expansion and wettability [38][39][40], which may create a stronger interface between matrix and reinforcement [41]. The reaction between matrix and reinforcement can generate new phases during processing or post-processing heat treatment, thereby affecting the mechanical properties of the composite depending upon the volumetric changes associated with the transformation, nature of the new phases and their bonding with the surrounding material [8,42].…”

Section: Introductionmentioning

confidence: 99%

“…In another example, the reaction between the Fe 3 Al reinforcement and aluminum matrix produces two new phases (Al 5 Fe 2 and Al 13 Fe 4 ) that significantly enhance the strength of the composites [44]. Phase transformations due to the reaction between matrix and particulate reinforcements in the case of aluminum-magnesium matrix composites lead to the in-situ formation of several intermetallics, e.g., Al [12,41,45], which has been reported as an effective way of composite strengthening along with other strengthening contributions.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Behavior of Al-Mg Composites Synthesized by Reactive Sintering

Shahid

Scudino

2018

Metals

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Lightweight metal matrix composites are synthesized from elemental powder mixtures of aluminum and magnesium using pressure-assisted reactive sintering. The effect of the reaction between aluminum and magnesium on the microstructure and mechanical properties of the composites due to the formation of β-Al3Mg2 and γ-Al12Mg17 intermetallics is investigated. The formation of the intermetallic compounds progressively consumes aluminum and magnesium and induces strengthening of the composites: the yield and compressive strengths increase with the increase of the content of intermetallic reinforcement at the expense of the plastic deformation. The yield strength of the composites follows the iso-stress model when the data are plotted as a function of the intermetallic content.

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“…Moreover, the starting material Ti powder also has a good wettability with Al melt, which means that introducing them directly into the melt is feasible. The solid processing methods based on powder metallurgy, mechanical alloying, and friction stirring processing have been applied to preparing Al 3 Ti/Al composites. However, as the reaction rate in the solid state is low, it is difficult to transform the mixture of aluminum and titanium particles completely into a Al 3 Ti/Al composite.…”

Section: Introductionmentioning

confidence: 99%

Microstructures and Mechanical Properties of Al₃Ti/Al Composites Produced In Situ by High Shearing Technology

et al. 2018

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Due to its low density, high strength, and stiffness the intermetallic phase Al 3 Ti is a good candidate as reinforcement for Al alloys. In this work, in situ Al 3 Ti particle reinforced Al composites are fabricated from Ti particles and Al melt via melt stirring with a high shearing mixer. Microstructure and mechanical properties are investigated. The results indicate that, owing to the high shearing effect and intensive macroscopic flow of the melt, reinforced particles are distributed homogeneously on the microscopic and macroscopic scale. Furthermore, Al 3 Ti particles are proved to be effective nuclei for heterogeneous nucleation of α-Al, thus the grain size of the Al matrix is significantly decreased. As a result of the fine grains and the uniform distribution of Al 3 Ti particles, E-modulus, yield, and tensile strength of the composites are enhanced.

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Friction stir processing of an aluminum-magnesium alloy with pre-placing elemental titanium powder: In-situ formation of an Al3Ti-reinforced nanocomposite and materials characterization

Cited by 80 publications

References 74 publications

EBSD investigation of Al/(Al₁₃Fe₄+Al₂O₃) nanocomposites fabricated by mechanical milling and friction stir processing

EBSD investigation of Al/(Al₁₃Fe₄+Al₂O₃) nanocomposites fabricated by mechanical milling and friction stir processing

Microstructure and Mechanical Behavior of Al-Mg Composites Synthesized by Reactive Sintering

Microstructures and Mechanical Properties of Al₃Ti/Al Composites Produced In Situ by High Shearing Technology

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Friction stir processing of an aluminum-magnesium alloy with pre-placing elemental titanium powder: In-situ formation of an Al3Ti-reinforced nanocomposite and materials characterization

Cited by 80 publications

References 74 publications

EBSD investigation of Al/(Al13Fe4+Al2O3) nanocomposites fabricated by mechanical milling and friction stir processing

EBSD investigation of Al/(Al13Fe4+Al2O3) nanocomposites fabricated by mechanical milling and friction stir processing

Microstructure and Mechanical Behavior of Al-Mg Composites Synthesized by Reactive Sintering

Microstructures and Mechanical Properties of Al3Ti/Al Composites Produced In Situ by High Shearing Technology

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EBSD investigation of Al/(Al₁₃Fe₄+Al₂O₃) nanocomposites fabricated by mechanical milling and friction stir processing

EBSD investigation of Al/(Al₁₃Fe₄+Al₂O₃) nanocomposites fabricated by mechanical milling and friction stir processing

Microstructures and Mechanical Properties of Al₃Ti/Al Composites Produced In Situ by High Shearing Technology