The Effects of Sintering Conditions on Selective Inhibition Sintering Process for Bronze

In this paper, a new type of Ti3SiC2/Cu composites with the volume fractions of 30% Ti3SiC2 particle was prepared by hot pressing and vacuum sintering respectively. The effects of sintering temperature and holding time on the density, resistance and Vickers hardness of Cu-30vol%Ti3SiC2 composite were investigated. The results show that the mechanical properties of the composites prepared by hot pressing are better than that prepared by vacuum sintering. The relative densities of Cu-30vol% Ti3SiC2 composites are rather high in suitable sintering conditions. It achieved 100% for the composites prepared by hot pressing at 930°C for 2h, and 98.4% for the composites prepared by vacuum sintering at 1250°C for 1h. At the same time, the maximum Vickers hardness reached 1735MPa at 900°C by hot pressing. The resistance and Vickers hardness of the composites decreased with an increase in sintering temperature, whereas the density increased. Scanning electron microscope (SEM) and energy-dispersive spectroscopy (EDS) were used to observe the microstructure of the composites. The relationship between microstructure and mechanical properties was discussed.

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Optimization and reliable analysis of selective inhibition sintering parameters to achieve reduced surface roughness of PA12 parts

Journal of Advanced Manufacturing Systems ◽

10.1142/s0219686721500244 ◽

2021 ◽

Author(s):

Sagar M. Baligidad

Keyword(s):

Surface Roughness ◽

Selective Inhibition ◽

Selective Inhibition Sintering ◽

Reliable Analysis ◽

Reduced Surface

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Optimization of fatigue strength of selective inhibition sintered polyamide 12 parts using RSM

Manufacturing Review ◽

10.1051/mfreview/2020020 ◽

2020 ◽

Vol 7 ◽

pp. 23

Author(s):

Mesfin Sisay ◽

Esakki Balasubramanian

Keyword(s):

Fatigue Strength ◽

Fatigue Behavior ◽

Selective Inhibition ◽

Layer By Layer ◽

Process Variables ◽

Polyamide 12 ◽

Selective Inhibition Sintering ◽

Nylon 12 ◽

Rate Optimization ◽

Feed Rate Optimization

Selective inhibition sintering (SIS) is a powder based that fabricate functional parts through fusion of powder bed on a layer by layer basis. Being a new fabrication method, the correlation between process variables and part properties are not fully comprehended. Polyamide 12 (nylon 12) is one of the widely used materials in powder based AM processes including SIS. Therefore, in this work, the effect of critical SIS process parameters on the fatigue behavior of polyamide 12 parts was experimentally investigated, and the parameter settings were optimized to maximize fatigue strength. The number of experimental runs was determined based on Box-Behnken design, and specimens were fabricated as per ASTM D7791. Specimens were tested by subjected them to fluctuating loading at a frequency of 3 Hz. The test results were analyzed using Minitab statistical analysis software. From the ANOVA result, it was identified that the fatigue life of SIS parts is significantly influenced by layer thickness, heater temperature, and heater feed rate. Optimization of process variables settings was performed using the Minitab response optimizer and maximum fatigue strength of 17.43 MPa was obtained. The verification experiment resulted in 17.93 MPa fatigue strength which is comparable to the predicted value and with the result from the literatures.

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Influence of Sintering Conditions on Mechanical Properties of Ag-Nano Sintered Material

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.741.7 ◽

2017 ◽

Vol 741 ◽

pp. 7-12

Author(s):

Shota Okuno ◽

Qiang Yu ◽

Yusuke Nakata

Keyword(s):

Mechanical Properties ◽

Mechanical Property ◽

Cross Section ◽

Sintered Material ◽

Sintering Process ◽

Effect Of Pressure ◽

Sintering Conditions ◽

Sintering Processes ◽

Joint Method

Recently, sintering joint using Ag-nanohas been attracting attention as a new joint method to replace the solder. However, the joint layer would contain a lot of voids after sintering processes. Since the voids affect mechanical property, the proper sintering conditions have to be selected in order to reduce these voids. In this research, the authors focus on the effect of pressure conditions at sintering process. Then, by creating FEM models including voids from cross section image of the joint layer and carrying out tensile analysis, the mechanical property of the joint layer has been acquired. Using this approach, the influence of pressure conditions on the mechanical properties is revealed.

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Thermo Mechanical Modeling of Selective Inhibition Sintered Thermoplastic Parts

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.813-814.791 ◽

2015 ◽

Vol 813-814 ◽

pp. 791-795 ◽

Cited By ~ 4

Author(s):

P. Arunkumar ◽

Esakki Balasubramanian ◽

U. Chandrasekhar

Keyword(s):

Selective Inhibition ◽

Spot Size ◽

Powdered Material ◽

Thin Layers ◽

Digital Data ◽

Thermal Gradients ◽

Selective Inhibition Sintering ◽

Engineering Organizations ◽

Near Net Shape

Contemporary product design and development efforts of various engineering organizations have experienced the emergence of Additive Manufacturing (AM) or 3D printing technology as a competent fabrication option for converting digital data into physical parts without using part-specific tools or fixtures. This paper presents the results of coupled field structural thermal analysis carried out on an innovative variant of AM technology called selective inhibition sintering wherein near net shape parts are fabricated through sintering of thin layers of powdered material while inhibiting the boundaries. Thermal gradients that are inherent to the process cause significant residual stresses affecting the part stability. Hence this study evaluates the effect of layer thickness and heater spot size on temperature gradient, displacement and thermal stress of two different polymers is assessed by numerical analysis. Results of the current study are relevant to enhancing the quality of sintered polymer parts with reference to dimensional fidelity and stability.

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