Effect of Alloying Element on the Integrity and Functionality of Aluminium-Based Alloy

Fayomi, O.S.I.; Popoola, A. P. I.; Udoye, N. E.

doi:10.5772/intechopen.71399

Cited by 22 publications

(13 citation statements)

References 14 publications

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“…Furthermore, modifying elements such as titanium and boron have been used as grain refiners in various aluminium alloy series [13,14]. Many researchers have focused on the impact of these components on grain refinement and particle size on mechanical characteristics [15][16][17]. The modifiers enhanced the cast alloy in two ways through grain refinement and decreased porosity during the casting process [18].…”

Section: Introductionmentioning

confidence: 99%

Effect of Grain Refinement on the Dynamic, Mechanical Properties, and Corrosion Behaviour of Al-Mg Alloy

Ahmed

Hefni

et al. 2021

Metals

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In this investigation, aluminium Al-2.5% Mg cast alloy was modified by adding 0.5 Ti and 0.1 B wt % modifiers to investigate their impact on the dynamic behaviour, as well as the mechanical and microstructure properties. The dynamic properties were analysed experimentally using a free vibration impact test and predicted using finite element methods. This study used a high-resolution polarised optical microscope to analyse the microstructure of the studied alloys and X-ray Powder Diffraction (XRD) analysis to determine the developed phases. Microstructure and mechanical properties were mostly enhanced as a result of grain refining during solidification and through the metal segregation process. The microstructure analysis of the modified alloy showed a significant improvement in the grain refinement; hence, the grains were 10 times finer than the cast alloy. The modified Al-2.5% Mg/Ti-B alloy demonstrated reduced inter-granular corrosion (IGC) than the Al-2.5% Mg standard cast alloy. By incorporating Ti-B modifiers into the composition of the cast Al-Mg alloy, the ultimate tensile strength (UTS), strain (ε), and hardness values (HV) were increased by 30.5%, 100%, and 18.18%, respectively. The dynamic properties of the modified alloy showed an enhancement in the resonant (fn) and damping ratio (ζ) by 7% and 68%, respectively. The predicted resonance frequencies of the investigated alloys showed results close to the experimental dynamic tests.

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Section: Introductionmentioning

confidence: 99%

Effect of Grain Refinement on the Dynamic, Mechanical Properties, and Corrosion Behaviour of Al-Mg Alloy

Ahmed

Hefni

et al. 2021

Metals

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“…Because of this characteristic feature, the alloy is quite suitable for casting. Addition of 1.65-12.6 Wt.% Si form hypoeutectic alloy, 12.6 Wt.% Si-eutectic alloy and >12.6 Wt.% Si-hyper eutectic alloy (Fayomi et al, 2017). The inevitable microstructural defects due to the casting route considerably deteriorate the wear properties.…”

Section: Introductionmentioning

confidence: 99%

A review on in-situ aluminum metal matrix composites manufactured via friction stir processing: meeting on-ground industrial applications

Prabhu¹,

Bajakke²,

Malik³

2021

WJE

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Purpose In-situ aluminum metal matrix composites (AMMC) have taken over the use of ex-situ AMMC due to the generation of finer and thermodynamically stable intermetallic compounds. However, conventional processing routes pose inevitable defects like porosity and agglomeration of particles. This paper aims to study current state of progress in in-situ AMMC fabricated by Friction Stir Processing. Design/methodology/approach Friction stir processing (FSP) has successfully evolved to be a favorable in-situ composite manufacturing technique. The dynamics of the process account for a higher plastic strain of 35 and a strain rate of 75 per second. These processing conditions are responsible for grain evolution from rolled grain → dislocation walls and dislocation tangles → subgrains → dislocation multiplication → new grains. Working of matrix and reinforcement under ultra-high strain rate and shorter exposure time to high temperatures produce ultra-fine grains. Do the grain evolution modes include subgrain boundaries → subgrain boundaries and high angle grain boundaries → high angle grain boundaries. Findings Further, the increased strain and strain rate can shave and disrupt the oxide layer on the surface of particles and enhance wettability between the constituents. The frictional heat generated by tool and workpiece interaction is sufficient enough to raise the temperature to facilitate the exothermic reaction between the constituents. The heat released during the exothermic reaction can even raise the temperature and accelerate the reaction kinetics. In addition, heat release may cause local melting of the matrix material which helps to form strong interfacial bonds. Originality/value This article critically reviews the state of the art in the fabrication of in-situ AMMC through FSP. Further, FSP as a primary process and post-processing technique in the synthesis of in-situ AMMC are also dealt with.

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“…Their specific behavior is known to depend on alloying strategies and processes, as reported in a rich literature (e.g. [7][8][9]). The choice of alloying elements is made based on the their individual and synergic impact on microstructure and hence on mechanical behavior.…”

Section: Introductionmentioning

confidence: 99%

Precipitation State of Warm Worked Aa7050 Alloy: Effect on Toughness Behavior

Schino

2021

Acta Metall Slovaca

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Usually strength-toughness combination in aluminum alloys is improved by heat treatment (solid solution followed by quenching and reheating) after a deformation process at high temperature. In some cases a cold working step is added in the manufacturing process before heat treatment aimed to enhance the alloy strength. In recent time, some trials have been carried out finalized to replace the cold working step with a warm deformation. Such process route appeared to be quite effective in improving the toughness behavior of 7xxx alloys. Anyway e metallurgical explanation for such behavior has not still be reported . In this a comparison of the precipitation state following the two different routes is reported. Results show clear differences in the nanoprecipitation densities in the two cases, claiming for their responsibility in the definition of the toughness behavior.

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Effect of Alloying Element on the Integrity and Functionality of Aluminium-Based Alloy

Cited by 22 publications

References 14 publications

Effect of Grain Refinement on the Dynamic, Mechanical Properties, and Corrosion Behaviour of Al-Mg Alloy

Effect of Grain Refinement on the Dynamic, Mechanical Properties, and Corrosion Behaviour of Al-Mg Alloy

A review on in-situ aluminum metal matrix composites manufactured via friction stir processing: meeting on-ground industrial applications

Precipitation State of Warm Worked Aa7050 Alloy: Effect on Toughness Behavior

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