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Molding Properties of Inconel 718 Feedstocks Used in Low-Pressure Powder Injection Molding

Vincent Demers, Nicole R. Demarquette, Sylvain Turenne and Orlando Scalzo

Article (2016)

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Cite this document: Demers, V., Demarquette, N. R., Turenne, S. & Scalzo, O. (2016). Molding Properties of Inconel 718 Feedstocks Used in Low-Pressure Powder Injection Molding. Advances in Materials Science and Engineering, 2016, p. 1-7. doi:10.1155/2016/7078045
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Abstract

The impact of binders and temperature on the rheological properties of feedstocks used in low-pressure powder injection molding was investigated. Experiments were conducted on different feedstock formulations obtained by mixing Inconel 718 powder with wax-based binder systems. The shear rate sensitivity index and the activation energy were used to study the degree of dependence of shear rate and temperature on the viscosity of the feedstocks. The injection performance of feedstocks was then evaluated using an analytical moldability model. The results indicated that the viscosity profiles of feedstocks depend significantly on the binder constituents, and the secondary binder constituents play an important role in the rheological behavior (pseudoplastic or near-Newtonian) exhibited by the feedstock formulations. Viscosity values as low as 0.06 to 2.9 Pa.s were measured at high shear rates and high temperatures. The results indicate that a feedstock containing a surfactant agent exhibits the best moldability characteristics.

Uncontrolled Keywords

Materials of engineering and construction. Mechanics of materials; TA401-492; Physics; QC1-999

Open Access document in PolyPublie
Subjects: 2100 Génie mécanique > 2100 Génie mécanique
Department: Département de génie mécanique
Research Center: Non applicable
Funders: CRSNG / NSERC
Grant number: 183917-04
Date Deposited: 22 Nov 2018 15:57
Last Modified: 23 Nov 2018 01:20
PolyPublie URL: https://publications.polymtl.ca/3492/
Document issued by the official publisher
Journal Title: Advances in Materials Science and Engineering (vol. 2016)
Publisher: Hindawi Publishing Corporation
Official URL: https://doi.org/10.1155/2016/7078045

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