Journal article
CFD modelling of nitrogen gas flow pattern during sintering of Al-7Zn-2.5Mg-1Cu alloy and its effect on distortion
XN Yuan, SM Aminossadati, GB Schaffer, M Qian
Powder Metallurgy | MANEY PUBLISHING | Published : 2015
Abstract
The effects of gas flow pattern on the distortion in Al-7Zn-2.5Mg-1Cu alloy were experimentally examined by sintering three rectangular samples, equally spaced 2-40 mm, in each batch at 620°C for 45 min under flowing nitrogen. A three-dimensional (3D) computational fluid dynamics (CFD) model was developed to investigate the gas flow behaviour surrounding three samples during isothermal sintering. Streamlines, gas flowrate into each cavity between two adjacent samples and wall shear stress distribution along the surfaces of each sample were found dependent on sample separation distance. The flow patterns could affect the distortion levels of the three samples by changing the oxygen content in..
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Funding Acknowledgements
This work was supported by Ampal Inc., a member of the United States Metal Powders Group, through the CAST CRC, a Cooperative Research Centre established by the Australian Commonwealth Government. XNY further acknowledges the support of a CAST-CRC Scholarship and a University of Queensland International Research Tuition Award.