Effect of tool shoulder geometry on fabrication of Al/Al<sub>2</sub>O<sub>3</sub> surface nano composite by friction stir processing

Parumandla, Naresh; Kumar, Adepu

doi:10.1080/02726351.2018.1490361

Cited by 21 publications

(5 citation statements)

References 18 publications

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“…The presence of these small dimples in the fracture cross-section indicates a fine and uniform structure in the stir zone [29,30]. Fine dimples at the fracture cross-section indicate a ductile fracture mechanism [30][31][32][33]. As the number of passes increases, the dimples become larger and larger which indicates a decrease in ductility [33].…”

Section: Resultsmentioning

confidence: 99%

“…Fine dimples at the fracture cross-section indicate a ductile fracture mechanism [30][31][32][33]. As the number of passes increases, the dimples become larger and larger which indicates a decrease in ductility [33]. On the other hand, ductility is related to the elongation of the sheet, so as the number of passes increases, the elongation and ductility decrease, and the ultimate tensile strength decreases.…”

Section: Resultsmentioning

confidence: 99%

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Synthesis of radar-absorbing NiFe₂O₄ nanoparticles and effects of pass number on mechanical properties of AA7075/NiFe₂O₄ surface nanocomposites fabricated by FSP

Hosseini¹,

Ashtiani²,

Ghanbari³

2021

Surf. Topogr.: Metrol. Prop.

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In this paper, first, the desired NiFe 2 O 4 nanoparticles were produced using the hydrothermal method then the AA7075/NiFe 2 O 4 surface nanocomposite was fabricated by the friction stir processing (FSP) method. The results show that the hydrothermal method is very suitable for making NiFe 2 O 4 nanoparticles with a fine and uniform structure that the fabricated nanoparticles have a superparamagnetic property that can be used for radar-absorbing coatings. The nanoparticles were well distributed in the base AA7075 aluminum alloy sheet in addition to the fine-grained structure achieved using FSP. The microhardness of the FSPed and surface nanocomposites were significantly improved compared to the base metal and increased with the increasing pass number of FSP. Also, the tensile properties consist of the ultimate tensile strength (UTS), formability, and toughness decrease with increasing the number of FSP passes.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Synthesis of radar-absorbing NiFe₂O₄ nanoparticles and effects of pass number on mechanical properties of AA7075/NiFe₂O₄ surface nanocomposites fabricated by FSP

Hosseini¹,

Ashtiani²,

Ghanbari³

2021

Surf. Topogr.: Metrol. Prop.

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“…In order for the reinforcement powder to stay in the holes during the FSP process, the closing pass carried out using a flat head tool, as shown in the figure 2(a). After the closing pass, FSP executed with the help of threaded tool pin [31]. The pin of threaded tool is 6 mm in diameter with 3.1 mm height and the shoulder diameter measured as 18 mm (figures 2(b), (c)).…”

Section: Fsp Of Az61/esp/wsmentioning

confidence: 99%

Mechanical and tribological behavior of friction stir processed AZ61/egg shell powder/WS₂ Hybrid surface composite

Vasudevan¹,

Megalingam²

2022

Surf. Topogr.: Metrol. Prop.

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Egg Shell Powder (ESP) and Tungsten Disulphide (WS2) are reinforced on AZ61 magnesium alloy through Friction Stir Process (FSP). The average particle size of ESP and WS2 are 45μm and 10μm, respectively. The ESP and WS2 mixed at different weight percentage (80/20, 70/30, 50/50, 30/70 and 20/80). Initially, equally spaced cylindrical holes are drilled on AZ61 alloy and then reinforcement mixture is filled in the holes using a flat head tool to secure the reinforcements. FSP tool pin with threaded profile is used to perform the friction stir process at tool rotation speed of 1000 rpm, 7 kN of axial load and 5 mm/minute tool transfers speed. From the micro and macro optical images, the defect free FSPed composite is obtained for the reinforcement combination of AZ61/80ESP/20WS2. The mechanical, tribological and corrosion tests are conducted on FSPed AZ61/80ESP/20WS2 composite and AZ61 base alloy according to ASTM standards. Microhardness increased twice in the nugget zone of FSPed AZ61/80ESP/20WS2 composite compared to the AZ61 base alloy because of grain refinement. The ultimate tensile strength of FSPed AZ61/80ESP/20WS2 composite increased up to 8.3% compared to AZ61 base alloy and showed ductile behaviour during the fracture. Dry wear tests conducted at three different sliding velocities (0.83, 1.7 and 2.5 m/s) and three different loads (5 N, 10 N and 15 N) by keeping the sliding distance as 1500 m. The results showed an improvement in wear resistance of FSPed AZ61/80ESP/20WS2 composite up to 35% compared to the AZ61 base alloy. SEM images revealed that the wear mechanism changes from adhesive to abrasive under high operating conditions. The results of electrochemical corrosion test revealed that the corrosion rate of the FSPed AZ61/80ESP/20WS2 composite reduced significantly at the nugget zone because of grain refinement and reinforcement addition.

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“…Aluminum alloys are the most favorable nonferrous alloy in aerospace and automotive industries due to their superior properties. 1 Metal matrix composites (MMCs) are gaining a lucrative role. Various techniques are used to manufacture MMCs like casting, electron beam irradiation technique, powder metallurgy, laser technique, spray deposition techniques, and mechanical alloying.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the microstructure, mechanical and wear performance of friction stir-processed AA6061-T6 plate reinforced with B₄C particles surface composite

Abdelhady

Elbadawi²,

Zoalfakar

2023

Journal of Composite Materials

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In this work, friction stir processing (FSP) was used to successfully embed boron carbide (B4C) particles into an aluminum matrix (AA6061-T6). Four specimens of aluminum 6061 composite reinforced with 4%, 6%, 8%, and 10% volume fraction of B4C were manufactured. The effects of B4C particles volume fraction on microstructure, mechanical and wear properties are investigated. The microstructural investigations demonstrated that a rise in the volume % of reinforcement greatly decreased the matrix grain size. The manufactured AA6061-T6 loaded with B4C surface composites demonstrated homogeneous B4C particle dispersion, with no significant particle clustering in the stir zone. In addition, it was established that increasing the volume fraction of B4C particles promoted grain refinement, increased hardness, and tensile strength. X-ray diffraction (XRD) was used to identify the reinforcement dispersion. For AA6061-T6 with 10% B4C particles, a maximum hardness value of 163 HV was obtained in the stir zone. Maximum yield strength of 165 MPa and ultimate tensile strength of 220 MPa were attained by AA6061-T6 with 10% B4C particles, which is an improvement of 21% over the specimen FSP without reinforcement. The strengthening of the grain refining was attributed for the increase in hardness and strength. The ductility was reduced by the incorporation of more B4C particles. Comparing the surface composite loaded with B4C to unreinforced friction stir processing and AA6061-T6 as received, it demonstrated superior wear resistance.

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Effect of tool shoulder geometry on fabrication of Al/Al₂O₃ surface nano composite by friction stir processing

Cited by 21 publications

References 18 publications

Synthesis of radar-absorbing NiFe₂O₄ nanoparticles and effects of pass number on mechanical properties of AA7075/NiFe₂O₄ surface nanocomposites fabricated by FSP

Synthesis of radar-absorbing NiFe₂O₄ nanoparticles and effects of pass number on mechanical properties of AA7075/NiFe₂O₄ surface nanocomposites fabricated by FSP

Mechanical and tribological behavior of friction stir processed AZ61/egg shell powder/WS₂ Hybrid surface composite

Investigation of the microstructure, mechanical and wear performance of friction stir-processed AA6061-T6 plate reinforced with B₄C particles surface composite

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Effect of tool shoulder geometry on fabrication of Al/Al2O3 surface nano composite by friction stir processing

Cited by 21 publications

References 18 publications

Synthesis of radar-absorbing NiFe2O4 nanoparticles and effects of pass number on mechanical properties of AA7075/NiFe2O4 surface nanocomposites fabricated by FSP

Synthesis of radar-absorbing NiFe2O4 nanoparticles and effects of pass number on mechanical properties of AA7075/NiFe2O4 surface nanocomposites fabricated by FSP

Mechanical and tribological behavior of friction stir processed AZ61/egg shell powder/WS2 Hybrid surface composite

Investigation of the microstructure, mechanical and wear performance of friction stir-processed AA6061-T6 plate reinforced with B4C particles surface composite

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Product

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Effect of tool shoulder geometry on fabrication of Al/Al₂O₃ surface nano composite by friction stir processing

Synthesis of radar-absorbing NiFe₂O₄ nanoparticles and effects of pass number on mechanical properties of AA7075/NiFe₂O₄ surface nanocomposites fabricated by FSP

Synthesis of radar-absorbing NiFe₂O₄ nanoparticles and effects of pass number on mechanical properties of AA7075/NiFe₂O₄ surface nanocomposites fabricated by FSP

Mechanical and tribological behavior of friction stir processed AZ61/egg shell powder/WS₂ Hybrid surface composite

Investigation of the microstructure, mechanical and wear performance of friction stir-processed AA6061-T6 plate reinforced with B₄C particles surface composite