Improvement of rheological properties of Inconel 718 MIM feedstock using tailored particle size distributions

Contreras, José M.; Jiménez-Morales, Antonia; Torralba, J. M.

doi:10.1179/174329008x313342

Cited by 28 publications

(11 citation statements)

References 4 publications

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“…[1][2][3][4], there is no relevant reference in literature concerning the pressure affected viscosity up to date, and even for pure polymers, where the influence of pressure on the flow behaviour is significant, reported results are ambiguous.…”

Section: Introductionmentioning

confidence: 99%

Pressure-affected flow properties of powder injection moulding compounds

2009

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The effect of pressure and temperature on the flow properties of the materials intended for Powder Injection Moulding (PIM) technology was studied using a single-piston capillary rheometer modified by additional backpressure chamber. The influence of pressure and temperature on shear viscosity has been quantified through pressure and temperature sensitivity coefficients derived from Carreau-Yasuda model. The temperature sensitivity of the 50 vol.% compound based on cemented carbide powder is lower than that of pure polymeric binder, and it varies only slightly with pressure. In contrast, the pressure sensitivity of compounds was found to be higher than that of pure polyolefin binder, and it is decreasing function of temperature. In addition, it is shown that temperature sensitivity of binder, which is considerably enhanced by pressure (in contrast to the PIM demands), cannot be determined as being equal to the properties of particular binder components.

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Section: Introductionmentioning

confidence: 99%

Pressure-affected flow properties of powder injection moulding compounds

2009

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“…4(a) that relatively large proportion of high temperature region remains in the turbine wheel with solid core structure, and this region is surrounded by a cooled shell. Large shrinkage stress is expected to be formed in the interfacial region, leading to the formation of defects because of the different volume contraction [13,14]. Fig.…”

Section: Simulation Of Injection Molding Processmentioning

confidence: 99%

Preparation of MIM213 turbine wheel with hollow internal structure

Lin

Chen

et al. 2015

Materials & Design

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“…Seerane et al [11] studied the influence of PSD on the SS 17-4PH sintered parts and found out that the coarser PSD (12-50 µm) yielded minimum shrinkage and inferior sintered density, whereas fine PSD (2-8 µm) resulted in higher shrinkage, lower sintered densities due to agglomerations, but superior mechanical properties. A study provided on four gas atomized Inconel 718 powders ranging from fine (<22 µm) to coarser fractions (65-212 µm) by Contreras et al [12] stresses the advantages of broad PSD in terms of better packing and lower viscosity.…”

Section: Introductionmentioning

confidence: 99%