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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Whalen, Scott
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Topics
Publications (10/10 displayed)
- 2023Solutionization via Severe Plastic Deformationcitations
- 2023Shear Assisted Processing and Extrusion (ShAPE) of Lightweight Automotive Components (CRADA 418)
- 2023Hot Rolling of ZK60 Magnesium Alloy with Isotropic Tensile Properties from Tubing Made by Shear Assisted Processing and Extrusion (ShAPE)citations
- 2023Co-Extrusion of Dissimilar Aluminum Alloys via Shear-Assisted Processing and Extrusioncitations
- 2023Effect of high iron content on direct recycling of unhomogenized aluminum 6063 scrap by Shear Assisted Processing and Extrusioncitations
- 2022Manufacture aluminum alloy tube from powder with a single-step extrusion via ShAPEcitations
- 2022Porosity evolution during heating of copper made from powder by friction extrusioncitations
- 2022Fabrication of Aluminum Alloy 6063 Tubing from Secondary Scrap with Shear Assisted Processing and Extrusioncitations
- 2021Mechanical and microstructural characterization of AZ31 magnesium‑carbon fiber reinforced polymer joint obtained by friction stir interlocking techniquecitations
- 2021Shear Assisted Processing and Extrusion of Aluminum Alloy 7075 Tubing at High Speedcitations
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article
Porosity evolution during heating of copper made from powder by friction extrusion
Abstract
Friction extrusion was used to compact and extrude solid copper rods from feedstock powders. Following extrusion, considerable porosity was observed throughout the extrudate cross section due to the entrained porosity in the feedstock material and the extrusion process. The thermal stability of the extrudate was investigated via a series of heat treatments. Porosity evolution exhibited three distinct stages—an unchanged plateau (0–300 °C) followed by an abrupt increase (400–500 °C) and ultimately a reduction, as the temperature increases (>500 °C). The peak porosity measured was ∼25%. The underlying driving force for pore evolution is described as the competition between the internal pore pressure, material strength, and sintering kinetics, as a function of temperature. The observed porosity evolution and driving force are not expected to be limited to copper. Thus, this manuscript reveals an important consideration regarding the microstructure thermal stability as advanced manufacturing methods involving direct powder extrusion are explored.