The Application of Friction Stir Processing to the Fabrication of Magnesium-Based Foams

Azizieh, M.; Pourmansouri, R.; Balak, Zohre; Kafashan, Hosein; Mazaheri, Mehdi; Kim, H. Seop

doi:10.1515/amm-2017-0293

Cited by 13 publications

(11 citation statements)

References 26 publications

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“…The preparation process is complicated, and the mechanical properties are unsatisfactory [8,9] . Friction stir processing (FSP) is a novel solid-state process to modify microstructures and their properties through high strain rate deformation [10,11] . At present, the friction stir processing has made some achievements in the research of particle reinforced aluminum matrix composites.…”

Section: Introductionmentioning

confidence: 99%

The Influences of Process Parameters on the Preparation of Closed-cell Aluminum foam by Friction Stir Processing

Pang

2021

Preprint

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In the present investigation, the closed-cell Al foam was fabricated by friction stir processing (FSP) combined with heat treatment. The influences of process parameters on microstructures of closed-cell Al foam precursor were investigated by optical metallographic microscope and scanning electronic microscope (OM/SEM). Fluent CFD software was developed to simulate the temperature field and flow field in friction stir processing. The cupping test values were compared for base metal and different weld passes. The results show that the welding speeds have little effect on the mixing of powder in the stir zone because of the relatively small welding heat input. However, the pore size and pore morphology are highly sensitive to change in the rotating speeds. When the welding speed is 50mm/min and the rotating speed is 2000rpm, the powder ring is continuous and uniform due to sufficient plastic deformation and flow. When the foaming time is 110s, the expansion rate of the whole foam increases rapidly, and the diameter of the pore is uniform. Numerical simulation shows that the welding heat mainly comes from the shoulder of the stirring head and the welding temperature peak appears near the stirring pin. The maximum flow velocity appears at the outer edge of the shaft shoulder in which the aluminum matrix is softened preferentially. When the rotating speed increases to 2000r/min, the velocity of the outermost edge of the shaft shoulder increases by 59.96%, and the maximum temperature at the stirring pin reaches 491℃ which is consistent with the experimental results. The formability of the joint interface is improved. The cupping test values increase with the increase of deformation temperature. Especially the cupping test value of foamed preform is close to that of base metal at 450℃.

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Section: Introductionmentioning

confidence: 99%

The Influences of Process Parameters on the Preparation of Closed-cell Aluminum foam by Friction Stir Processing

Pang

2021

Preprint

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“…Several methods have been used for the fabrication of porous composite. These include compression molding and salt leaching, 15 laser sintering, 17,18 compounding of PEEK with porogens, 19 and friction stir processing (FSP) 20 . Poor interaction due to the low wettability between molten PEEK and HA is the main problem for the fabrication of PEEK composites which always results in the agglomeration of HA additives and decreased mechanical properties of the composite 21 .…”

Section: Introductionmentioning

confidence: 99%

“…The use of low processing temperature of FSP could prevent the substrate from damaging and is particularly suitable to be employed to modify the PEEK surface and fabrication of PEEK/HA surface nanocomposites 22 . In addition, the FSP can be utilized to develop porous structure 20 …”

Section: Introductionmentioning

confidence: 99%

“…These include compression molding and salt leaching, 15 laser sintering, 17,18 compounding of PEEK with porogens, 19 and friction stir processing (FSP). 20 Poor interaction due to the low wettability between molten PEEK and HA is the main problem for the fabrication of PEEK composites which always results in the agglomeration of HA additives and decreased mechanical properties of the composite. 21 This problem makes the FSP a logical alternative for the conventional fabrication methods due to its solid phase processing property.…”

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confidence: 99%

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Fabrication and in vitro study of 3D novel porous hydroxyapatite/polyether ether ketone surface nanocomposite

et al. 2021

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The unique characteristics of polyether ether ketone (PEEK) including low elastic modulus, high mechanical strength, and biocompatibility have made it an attractive alternative for the metallic biomaterials. However, its bioinert property is always the main concern, which could lead to poor osseointegration and subsequent clinical failure of the implant. Changing the surface structure to porous structure and mixing it with bioactive hydroxyapatite (HA) are the common methods, which could be used to enhance the properties of the PEEK‐based implants. In this study, friction stir processing was utilized for the fabrication of porous HA/PEEK surface nanocomposite. Scanning electron microscopic image of the nanocomposite surface showed nano‐scale roughness of the porous structure. Water contact angle test confirmed the increase in the wettability of the treated specimens. In vitro bioactivity test via simulated body fluid solution, initial cell adhesion, cell proliferation, and cell differentiation assay also confirmed the enhancement in bioactivity of the treated surface in comparison to the bare PEEK. This surface modification method requires no special equipment and would not damage the heat‐sensitive PEEK substrate due to the low temperature used during the fabrication process.

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“…The ADC12 precursors were fabricated by the friction stir welding (FSW) route in accordance with Ref. [12][13][14]. ADC12 die-casting plates [15] were used as the starting material.…”

Section: Introductionmentioning

confidence: 99%

Shaping of Aluminum Foam during Foaming of Precursor Using Steel Mesh with Various Opening Ratios

Hangai

Nagahiro

Ohashi

et al. 2019

Metals

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In this study, steel meshes with various opening ratios φ were used to shape aluminum foams during precursor foaming. The effect of φ on the heating rate and shape of the obtained aluminum foams was investigated. It was found that steel meshes with various opening ratios can be used to shape aluminum foam. There is no significant effect on the pore structures of the obtained aluminum foams when upward expansion is restricted during foaming, regardless of the value of φ. The meshes with higher φ clearly transfer the mesh pattern onto the surface of the aluminum foam but require a shorter foaming time. In contrast, the lower-φ meshes produce aluminum foams with a smoother surface but a longer foaming time is required.

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The Application of Friction Stir Processing to the Fabrication of Magnesium-Based Foams

Cited by 13 publications

References 26 publications

The Influences of Process Parameters on the Preparation of Closed-cell Aluminum foam by Friction Stir Processing

The Influences of Process Parameters on the Preparation of Closed-cell Aluminum foam by Friction Stir Processing

Fabrication and in vitro study of 3D novel porous hydroxyapatite/polyether ether ketone surface nanocomposite

Shaping of Aluminum Foam during Foaming of Precursor Using Steel Mesh with Various Opening Ratios

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