Properties and Fracture Surface Features of Plaster Mold Reinforced with Short Polypropylene Fibers for Investment Casting

Lu, Yan; Liu, Xiangdong; Lű, Kai; Li, Yanfen; Liu, Fukui; Liu, Peng

doi:10.1007/s40962-020-00505-3

Cited by 6 publications

(3 citation statements)

References 16 publications

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“…High-temperature performance is critical in casting process, which can avoid cracking and control distortion [19]. Adding extra thickness could strengthen the shell, but it leads to difficulty in post processing and pinholes at the surface [20]. By introducing inorganic fibers such as aluminum silicate, the strength and damage tolerance of mullite can be significantly improved [21].…”

Section: Methodsmentioning

confidence: 99%

Semi-solid plasticity and deformation control of superalloy investment casting

Ding

Wang²,

Guan³

et al. 2023

Preprint

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The deformation in superalloy investment casting under thermal-mechanical coupled stress is causing huge waste of materials and energy. Mechanical models of both alloy and shell are essential to predict the deformation of castings accurately. The elastoplastic behavior of superalloy in semi-solid zone is critical to the deformation during solidification. In this paper, the deformation of ring-to-ring castings with Ni-based superalloy K4169 is researched. To obtain the thermal-mechanical behavior of K4169 from solid region to semi-solid zone, physical simulated uniaxial compression is performed. Yield stress and plastic modulus from the measurement are imported into the database for numerical simulation. Different thermal-mechanical models of both alloy and shell are compared. With elastoplastic model for alloy, considering the deformability of shell with elastic model, the accuracy of prediction is within CT4 level, with a maximum error of 0.39mm. The deformation of reaches the minimum when the initial temperature of alloy and shell are 1500℃ and 900℃. The research on semi-solid performance of alloy and thermal-mechanical models can provide theoretical guidance for deformation prediction. The method of this research is promising in dimensional control of castings, and can be transported to dimensional control problems upon solidification process with different kinds of materials and castings.

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Section: Methodsmentioning

confidence: 99%

Semi-solid plasticity and deformation control of superalloy investment casting

Ding

Wang²,

Guan³

et al. 2023

Preprint

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“…From the end of World War 2 to 2020, the global demand for composite materials has only increased (Nunes 2015;Serifou et al 2020). These composite materials have been strongly involved in the development of our technologies both for sustainable construction, aviation (Das et al 2020;May et al 2020), shipbuilding (Bajakke et al 2020;Rubino et al 2020), for acoustic (Kushwaha and Bagha 2020;Marques et al 2020), for human comfort in buildings (Costa-Neves et al 2014;Granqvist et al 2018;M'ghari et al 2021), for furnishings (Ndiwe et al 2022(Ndiwe et al , 2020(Ndiwe et al , 2019 and the manufacture of medical plaster prostheses (Lu et al 2021). They stand out for their lightness, abundance, their renewability, and ease of use.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Grewia bicolor fibre and its use in the development of composites

Ndiwe,

Konai,

Omgba Betené

et al. 2023

International Wood Products Journal

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The fibre of Grewia bicolor bark (GB) was extracted and used as reinforcement for the development fibreboards using orthophtalique unsaturated polyester (UP) as a matrix. Two methods of extraction of fibres were used, namely biological retting and chemical extraction by a sodium hydroxide solution at a 5% concentration. Chemical, Physical, mechanical, and thermal characteristics were determined using ATF FTIR, mechanical test and thermogravimetric analysis. The theoretical density of the characterized fibres was 1.30 g/ cm 3 . The porosity decreases by 5% from the root to the leaves. The SEM analysis indicated the presence of fibrils coated with a rough sheath similar to a honeycomb cell structure. The use of NaOH in the extraction method removes the hemicellulose, pectin, wax, and lignin from the fibres. The average elasticity modulus of untreated and treated fibres are, respectively, E = 35.18 ± 2.25 MPa and E = 33.47 ± 2.35 MPa and internal bond of fibreboards are 0.98 ± 0.05 MPa and 1.06 ± 0.02 MPa.

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“…In order to enhance the toughness and strength of construction gypsum, numerous scholars both domestically and internationally have conducted extensive research, discovering that the incorporation of fibers can effectively improve the mechanical and physical properties of composite materials. At present, most researchers have primarily investigated the reinforcing effects of polypropylene fibers [ 11 , 12 , 13 , 14 , 15 , 16 ], glass fibers [ 17 , 18 , 19 , 20 , 21 , 22 ], basalt fibers [ 18 , 23 , 24 , 25 , 26 ], and plant fibers [ 27 , 28 , 29 ] on various types of construction gypsum. PVA fibers, a type of synthetic organic fiber with remarkable properties such as high strength and good toughness, are widely employed in the preparation of ECC materials.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Workability and Mechanical Properties of PVA Fiber-Reinforced Phosphogypsum-Based Composite Materials

Huang

Tao

et al. 2023

Materials

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To address the poor characteristics of low strength and poor toughness in phosphogypsum-based construction material, this study investigates the influence of different diameters, lengths, and dosages of polyvinyl alcohol (abbreviated as PVA) fibers on the workability and mechanical properties of phosphogypsum-based construction material. The results show that as the length and dosage of PVA fibers increase, the flowability of the slurry gradually decreases, and the setting time also shortens. With an increase in the diameter of PVA fibers, the rate of decrease in flowability slows down, and the rate of shortening of setting time also gradually slows down. Moreover, the inclusion of PVA fibers significantly improves the mechanical strength of the specimens. When PVA fibers with a diameter of 15 μm, length of 12 mm, and dosage of 1.6% are used, the phosphogypsum-based construction material reinforced with PVA fibers exhibits optimal performance. Under this mixing ratio, the strength values of the specimens for flexural strength, bending strength, compressive strength, and tensile strength are 10.07 MPa, 10.73 MPa, 13.25 MPa, and 2.89 MPa, respectively. Compared to the control group, the strength enhancements are 273.00%, 164.29%, 15.32%, and 99.31%, respectively. SEM scanning of the microstructure provides a preliminary explanation for the mechanism of how PVA fibers affect the workability and mechanical properties of phosphogypsum-based construction material. The findings of this study can provide a reference for the research and application of fiber-reinforced phosphogypsum-based construction material.

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Properties and Fracture Surface Features of Plaster Mold Reinforced with Short Polypropylene Fibers for Investment Casting

Cited by 6 publications

References 16 publications

Semi-solid plasticity and deformation control of superalloy investment casting

Semi-solid plasticity and deformation control of superalloy investment casting

Characterization of Grewia bicolor fibre and its use in the development of composites

Investigation of Workability and Mechanical Properties of PVA Fiber-Reinforced Phosphogypsum-Based Composite Materials

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