Effect of Extrusion Process on Mechanical Properties of Al-MWCNT Composites Synthesized by Powder Metallurgy Route

Jatti, Vijaykumar S.; Khedkar, Nitin K.; Jatti, Vinaykumar S.; Jatti, Ashwini V.; Athare, Ajay S.

doi:10.1007/978-3-031-34644-6_85

Cited by 2 publications

(2 citation statements)

References 12 publications

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“…As shown in Figure 3A–E, the increase in the printing speed from 20 to 60 mm/s resulted in decreased tensile, flexural, compressive, impact, and shear strength of PC parts. This occurs because as PC is printed at very high temperatures and with higher printing speeds when the successive layers are laid on top of each other without the preceding layer being sufficiently cooled, the adjacent layers do not have adequate time for fusion with each other, which creates weak interlayer bonding and voids in the structure 11,29 . With lower printing speeds, enough time is available for a newly deposited layer to fuse with the previously deposited layer, which results in better bonding and strength 28,30 …”

Section: Resultsmentioning

confidence: 99%

Enhancing mechanical properties of polycarbonate parts developed by fused filament fabrication using RSM‐TOPSIS hybrid approach

Faroze,

Srivastava,

Batish

2023

Polymer Engineering & Sci

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Fused filament fabrication (FFF) is a high‐tech additive manufacturing technique with a wide range of applications, as it allows the production of functional parts with complex geometries in a reasonable time. Mechanical characteristics and dimensional accuracy must be estimated for the functional testing of products created with different polymeric materials. The mechanical characteristics and dimensional quality of manufactured parts are determined by several process variables. The purpose of this research is to determine the effect of four significant process variables (layer thickness, filament extrusion temperature, extrusion width, and printing speed) on the mechanical characteristics (tensile, three‐point bending, compression, Izod, and shear strengths) of FFF‐printed polycarbonate parts. Statistical models were created using the central composite rotatable design of the response surface methodology to demonstrate the relationship between the mechanical properties and the process factors. The accuracy of the developed models was assessed using ANOVA. TOPSIS analysis has been used to determine the optimal process conditions for achieving the optimum mechanical quality characteristics of FFF‐printed polycarbonate parts. The fractured and deformed surfaces of the test samples were examined using scanning electron microscopy.Highlights Effect of process variables on mechanical properties of FFF‐printed PC parts was analyzed. Quadratic models based on the CCRD design of RSM methodology have been developed. The models correlate the mechanical characteristics to the process variables. ANOVA was used to determine the developed model's adequacy. TOPSIS was used to optimize the process conditions.

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Section: Resultsmentioning

confidence: 99%

Enhancing mechanical properties of polycarbonate parts developed by fused filament fabrication using RSM‐TOPSIS hybrid approach

Faroze,

Srivastava,

Batish

2023

Polymer Engineering & Sci

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“…Specific to printing temperature, researchers have found that increasing the printing temperature has a positive effect on the mechanical properties, but that an excessive increase results in more brittle parts [45]. Vanaei et al [46] studied the effect of extrusion and platform temperature as well as the cooling factors that affected the bonding between the materials and concluded that the effect of the extruder temperature was more significant compared to other process parameters.…”

Section: Introductionmentioning

confidence: 99%

Characterization of the Dimensional Precision, Physical Bonding, and Tensile Performance of 3D-Printed PLA Parts with Different Printing Temperature

Pang,

Lai,

Ismail

et al. 2024

JMMP

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In this study, tensile test specimens were fabricated using a material extrusion 3D-printer at various printing temperatures to evaluate the development of physical bonds within the same layer as well as in between previous layers. The tensile test specimens were fabricated using PLA material, with printing temperatures ranging from 180 °C to 260 °C. Experimental investigations were conducted to investigate the dimensional accuracy and physical appearance of the parts across printing temperatures. Uniaxial tensile tests were conducted at a strain rate of 1 mm/min and repeated five times for each variable in accordance with the ASTM D638-14 standard. Results showed that increasing the printing temperatures yielded parts with better tensile properties. An approximate difference of 40% in tensile strength was observed between specimens fabricated under the two most extreme conditions (180 °C and 260 °C). The changes in tensile properties were attributed to bonding mechanisms related to interlayer bonding strength and a reduction in voids within the internal geometry. Analysis of the fracture surface using scanning electron microscopy (SEM) revealed fewer and smaller voids within the internal geometry for parts printed at higher temperature. The percentage area of voids reduced significantly when the printing temperature was increased from 180 °C to 220 °C. The tensile properties continuously improved with the printing temperature, with parts printed at 220 °C exhibiting the highest dimensional accuracy. The findings offer insight into the impact of the printing temperature on both the external physical bonds between printed roads, affecting the physical appearance and dimensional accuracy, and the internal bonds, affecting the tensile properties of the fabricated parts.

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Effect of Extrusion Process on Mechanical Properties of Al-MWCNT Composites Synthesized by Powder Metallurgy Route

Cited by 2 publications

References 12 publications

Enhancing mechanical properties of polycarbonate parts developed by fused filament fabrication using RSM‐TOPSIS hybrid approach

Enhancing mechanical properties of polycarbonate parts developed by fused filament fabrication using RSM‐TOPSIS hybrid approach

Characterization of the Dimensional Precision, Physical Bonding, and Tensile Performance of 3D-Printed PLA Parts with Different Printing Temperature

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