Rheological Property and Fluid Constitutive Relationship of Medium-density W-Ni-Fe Feedstock in Metal Injection Molding Process

ZHENG Zhen-xing; WANG Shi-yong; XIA Wei; ZHOU Zhao-yao

Materials and Mechanical Engineering > 2008 > 32(4): 24-28.

ZHENG Zhen-xing, WANG Shi-yong, XIA Wei, ZHOU Zhao-yao. Rheological Property and Fluid Constitutive Relationship of Medium-density W-Ni-Fe Feedstock in Metal Injection Molding Process[J]. Materials and Mechanical Engineering, 2008, 32(4): 24-28.

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Rheological Property and Fluid Constitutive Relationship of Medium-density W-Ni-Fe Feedstock in Metal Injection Molding Process

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Received Date: August 26, 2007

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Rheology properties of three kinds of W-Ni-Fe feedstock with different densities (10,14,17 g·cm-3 respectively after sintered) were studied to determine the effect of shear rate,temperature and tungsten-nickel ratio.Results suggest that W-Ni-Fe feedstock is a kind of pseudo-plastic fluid.The apparent viscosity of the W-Ni-Fe feedstock declined as shear rate increases or temperature rised.Non-Newtonian exponent increased as temperature rised.The tungsten-nickel feedstock became more sensitive to shear rate and temperature when the ratio of tungsten increased.In addition,fluid constitutive relationship of the feedstock was derived through the non-linear fit technology.
- tungsten-nickel alloy,
- rheology property,
- fluid constitutive relationship,
- metal injection molding

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