Sintering shrinkage of prior cold compacted iron rings with different geometry (height to wall thickness ratio) and green density in the 6.5–7.3 g/cm3 range was investigated. It displays a minimum at an intermediate green density. Axial, tangential and radial shrinkages are different, due to the gradients of green density along the axial and the radial directions. Therefore, the effect of height on shrinkage and its anisotropy is the result of their effect on the stress distribution in the green parts during cold compaction, and the resulting green density and deformation experienced by the powder. Anisotropy decreases on increasing shrinkage.

Effect of geometry and green density on the anisotropic sintering shrinkage of axisymmetric iron parts / Molinari, Alberto; Amirabdollahian, Sasan; Zago, Marco; Larsson, Mats; Cristofolini, Ilaria. - In: POWDER METALLURGY. - ISSN 0032-5899. - 2018, 61:4(2018), pp. 267-275. [10.1080/00325899.2018.1483064]

Effect of geometry and green density on the anisotropic sintering shrinkage of axisymmetric iron parts

Molinari, Alberto;Amirabdollahian, Sasan;Zago, Marco;Cristofolini, Ilaria
2018-01-01

Abstract

Sintering shrinkage of prior cold compacted iron rings with different geometry (height to wall thickness ratio) and green density in the 6.5–7.3 g/cm3 range was investigated. It displays a minimum at an intermediate green density. Axial, tangential and radial shrinkages are different, due to the gradients of green density along the axial and the radial directions. Therefore, the effect of height on shrinkage and its anisotropy is the result of their effect on the stress distribution in the green parts during cold compaction, and the resulting green density and deformation experienced by the powder. Anisotropy decreases on increasing shrinkage.
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Molinari, Alberto; Amirabdollahian, Sasan; Zago, Marco; Larsson, Mats; Cristofolini, Ilaria
Effect of geometry and green density on the anisotropic sintering shrinkage of axisymmetric iron parts / Molinari, Alberto; Amirabdollahian, Sasan; Zago, Marco; Larsson, Mats; Cristofolini, Ilaria. - In: POWDER METALLURGY. - ISSN 0032-5899. - 2018, 61:4(2018), pp. 267-275. [10.1080/00325899.2018.1483064]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/211153
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