Characteristic and mechanism of nugget performance evolution with rotation speed for high-rotation-speed friction stir welded 6061 aluminum alloy

Zhang, H.J.; Sun, Shuchen; Liu, H.J.; Zhu, Zhigang; Wang, Y.L.

doi:10.1016/j.jmapro.2020.10.081

Cited by 24 publications

(7 citation statements)

References 27 publications

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“…This promotion can be mainly affected by rotational speed, which is a key parameter in FSP. A high rotational speed results in increased heat input, which in turn leads to a coarse grain size [11,12] Fig. 1(c3).…”

Section: Tribology Analysismentioning

confidence: 99%

Influence of process parameters on wear resistance of surfaces modified by friction stirring processing in 7075 aluminum alloy

Wang,

Liu,

Zhang

et al. 2024

Preprint

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This work investigated effects of friction stirred processing (FSP) parameters on the wear resistance of 7075 aluminum alloy. The results indicate the significantly higher wear rate and average coefficient of friction during the stabilization stage of samples W1 (welding speed: 60 mm/min; rotation speed: 1000 rpm) and W8 (welding speed: 80 mm/min; rotation speed: 1200 rpm), with increases of 45% and 40% for the wear rate, respectively, and 19% and 13% for coefficient of friction in comparison with the untreated material. The optimized FSP parameters can considerably improve the wear resistance of the material by affecting the heat input, which altered the grain size and distribution in the welded zone. X-Ray diffraction and scanning electron microscopy/energy dispersive spectroscopy studies provided the mechanism underlying grain size and plastic nano twin structures contributions to wear resistance.

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Section: Tribology Analysismentioning

confidence: 99%

Influence of process parameters on wear resistance of surfaces modified by friction stirring processing in 7075 aluminum alloy

Wang,

Liu,

Zhang

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…The grain refinement can promote the strength of the salt core, which can be explained by the Hall-Petch Eq. ( 6) [30], where σ represents the yield strength of the salt cores, D represents the mean grain size, σ 0 is the intrinsic yield strength, and K is the material constant. The appropriate ceramic powder can improve the performance of the salt core, but excessive addition may have the opposite effect [29,31].…”

Section: Microstructure Analysismentioning

confidence: 99%

3D printing of high-strength water-soluble salt cores via material extrusion

Gong

Liu

Chen

et al. 2021

Int J Adv Manuf Technol

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Core materials with high strength and excellent collapsibility are important for the manufacture of hollow composite structure castings. In this work, a novel technology to fabricate water-soluble Na 2 SO 4 -NaCl-based salt cores with high strength and low cost by material extrusion (ME) was reported. The water-soluble Na 2 SO 4 and NaCl powders were used as the matrix materials, and the bauxite powder was used as the reinforcing material. The effects of bauxite powder content and liquid phase sintering parameters on the properties of the salt cores were studied. The results show that the salt-based slurry exhibits shear thinning property within the studied bauxite powder contents. When the content of bauxite powder was 20 wt.% and the sintering was at 630 ℃/30 min, the obtained salt cores show an optimal comprehensive performance, with the bending strength, linear shrinkage, water solubility rate, and moisture rate of 24.43 MPa, 6.3%, 207.6 (g/min•m 2 ), and 0.29%, respectively. The complex water-soluble salt core samples prepared under optimal parameters display high-strength and well-shaped morphology.

show abstract

“…The grain refinement can promote the strength of the salt core, which can be explained by the Hall-Petch Eq. (6) [30], where σ represents the yield strength of the salt cores, D represents the mean grain size, σ0 is the intrinsic yield strength and K is the material constant. The appropriate ceramic powder can improve the performance of the salt core, but excessive addition may have the opposite effect [29,31].…”

Section: Performance Characteristicsmentioning

confidence: 99%

3D Printing of High-Strength Water-Soluble Salt Cores Via Layered Extrusion Forming

Gong

Liu

Chen

et al. 2021

Preprint

View full text Add to dashboard Cite

Core materials with high strength and excellent collapsibility are important for the manufacture of hollow composite structure castings. In this work, a novel technology to fabricate water-soluble Na2SO4-NaCl based salt cores with high strength and low cost by layered extrusion forming (LEF) was reported. The water-soluble Na2SO4 and NaCl powder were used as the matrix materials, and the bauxite powder was used as the reinforcing material. The effects of bauxite powder content and liquid phase sintering parameters on properties of the salt cores were studied. The results show that the salt-based slurry exhibits shear thinning property within the studied bauxite powder contents. When the content of bauxite powder was 20 wt.% and the sintering was at 630 ℃/30 min, the obtained salt cores show an optimal comprehensive performance, with the bending strength, linear shrinkage, water-solubility rate and moisture rate of 24.43 MPa, 6.3%, 207.6 (g/min·m2), and 0.29%, respectively. The complex water-soluble salt core samples prepared under the optimal parameters display high-strength and well-shaped morphology.

show abstract

Characteristic and mechanism of nugget performance evolution with rotation speed for high-rotation-speed friction stir welded 6061 aluminum alloy

Cited by 24 publications

References 27 publications

Influence of process parameters on wear resistance of surfaces modified by friction stirring processing in 7075 aluminum alloy

Influence of process parameters on wear resistance of surfaces modified by friction stirring processing in 7075 aluminum alloy

3D printing of high-strength water-soluble salt cores via material extrusion

3D Printing of High-Strength Water-Soluble Salt Cores Via Layered Extrusion Forming

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