Microstructural and mechanical characteristics of AA1050/mischmetal oxide in-situ hybrid surface nanocomposite by multi-pass friction stir processing

Alishavandi, Mahdi; Ebadi, Mahnam; Alishavandi, Sajjad; Kokabi, A.H.

doi:10.1016/j.surfcoat.2020.125488

Cited by 14 publications

(7 citation statements)

References 39 publications

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“…Despite the low values for the yield strength (R p0.2 = 28 MPa) and UTS (R m = 76 Mpa), this alloy was used for the specific state "O", having improved elongation at break capability; compared to other states (H14, H16, or H18) that offer superior yield and ultimate tensile strength, but only 8 to 12% elongation, this alloy was capable of up to 39% elongation at break. It was the subject of numerous studies, including the analysis of corrosion resistance, mechanical properties, and microstructure by continuous closed die forging [49] or carbonized eggshell [48], hybrid surface nanocomposite by multi-pass friction stir processing [50], thermal stability after equal channel angular pressing [51], layered sandwich composite materials [37,38], and explosive welded laminate [52]. A GOM Atos II 400 3D scanner image measurement system, highlighted in Figure 8a, was used to obtain precise measurements.…”

Section: Asfp Algorithm and Industrial Setupmentioning

confidence: 99%

Adaptive Stretch-Forming Process: A Computer Vision and Statistical Analysis Approach

et al. 2021

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An industrial process is defined through its quality of parts and their production costs. Labour-intensive operations must be applied to produce high-quality components with inexpensive resources. Recent development in dedicated software allows the industrial sector to rely on more and more autonomous solutions to obtain an optimum ratio between part quality and cost. The stretch forming process is an operation that has a high degree of difficulty, due to the process parameters and the spring-back effect of materials. Our approach to solving several of the shortcomings of this process was to develop a self-adaptive algorithm with computer vision capabilities that adapts to the process in real-time. This experimental study highlights the results obtained using this method, as well as a comparison to a classical method for the stretch-forming process (SFP). The results have noted that the stretch-forming algorithm improves the process, while adapting its decisions with each step.

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Section: Asfp Algorithm and Industrial Setupmentioning

confidence: 99%

Adaptive Stretch-Forming Process: A Computer Vision and Statistical Analysis Approach

et al. 2021

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“…Alishavandi et al. 16 investigated multi-pass friction stir processing to enhance microstructure and mechanical properties of AA1050/mischmetal oxide in-situ hybrid surface nanocomposite. Increasing pass number improved the particle distribution and decreased agglomerated particle size while promoting the insitu solid-state reaction.…”

Section: Introductionmentioning

confidence: 99%

“…Mechanical properties of AZ91 magnesium alloy and surface composites using SiC as well as Al 2 O 3 nano-particles during the friction stir process were developed by Dadaei et al 15 It was concluded that the homogeneous distribution of particles resulted in the decrease of grain sizes to 3 mm and the increase in strength and formability index to 390 and 6500 MPa, respectively. Alishavandi et al 16 investigated multi-pass friction stir processing to enhance microstructure and mechanical properties of AA1050/mischmetal oxide in-situ hybrid surface nanocomposite. Increasing pass number improved the particle distribution and decreased agglomerated particle size while promoting the insitu solid-state reaction.…”

Section: Introductionmentioning

confidence: 99%

The role of vibration and pass number on microstructure and mechanical properties of AZ91/SiC composite layer during friction stir processing

Bagheri

Abdollah-zadeh

Sharifi

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part C:

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In this study, nano-sized SiC particles are added to AZ91 magnesium alloy using friction stir processing (FSP) and friction stir vibration processing (FSVP) to produce surface nano-composite layers. FSVP is a modified method of FSP in which the specimen is vibrated during FSP. The influence of FSP and FSVP pass numbers on mechanical and microstructural behaviors of the developed surfaces is investigated. It is indicated that nano-composite layers produced by FSVP have finer microstructures compared to those produced by FSP, and nano-sized particles are distributed more homogeneously. Furthermore, mechanical properties including hardness, scratch resistance, ductility, and strength of FSV processed specimens, were higher than those related to FS processed specimens. The results show a decline in the porosity content as the FSP passes are increased. Also, the compressive strength of the FSVP-ed composites is higher than those for the FSP-ed samples. It is also noticed that an increase in the vibration frequency during the FSVP process causes a more uniform dispersion of composite particles and thus, decreases particle clustering.

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“…Formed Al 2 O 3 oxide layers enhanced the corrosion resistance. The corrosion rate of the composite (0.29 mpy) was reduced to nearly 1.41 times when compared with the corrosion rate of the base material (0.41 mpy) (Alishavandi et al, 2020a(Alishavandi et al, , 2020b. Figure 3(a) shows typical cyclic polarization curves of a base material, FSPed substrate and FSPed composite material.…”

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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Microstructural and mechanical characteristics of AA1050/mischmetal oxide in-situ hybrid surface nanocomposite by multi-pass friction stir processing

Cited by 14 publications

References 39 publications

Adaptive Stretch-Forming Process: A Computer Vision and Statistical Analysis Approach

Adaptive Stretch-Forming Process: A Computer Vision and Statistical Analysis Approach

The role of vibration and pass number on microstructure and mechanical properties of AZ91/SiC composite layer during friction stir processing

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

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