Grain size affecting the deformation characteristics via micro-injection upsetting
Abd-Elaziem, Walaa; Hassan, Mohsen A.; Makino, Takehiko; Hamada, Atef (2021-08-12)
Walaa Abd-Elaziem, Mohsen A. Hassan, Takehiko Makino & Atef Hamada (2021) Grain size affecting the deformation characteristics via micro-injection upsetting, Materials Science and Technology, 37:10, 918-929, DOI: 10.1080/02670836.2021.1964058
© The Author(s) 2021. This is an Accepted Manuscript version of the following article, accepted for publication in Materials Science and Technology. Walaa Abd-Elaziem, Mohsen A. Hassan, Takehiko Makino & Atef Hamada (2021) Grain size affecting the deformation characteristics via micro-injection upsetting, Materials Science and Technology, 37:10, 918-929, DOI: 10.1080/02670836.2021.1964058. It is deposited under the terms of the Creative Commons Attribution-NonCommercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited.
https://creativecommons.org/licenses/by-nc/4.0/
https://urn.fi/URN:NBN:fi-fe2023041837300
Tiivistelmä
Abstract
The micro-injection upsetting (MIU) experiments of commercially pure aluminium have been conducted on two groups of specimens with different grain structures. One group is of coarse grain (CG, undeformed) and the other group is of fine grain (FG) achieved via the 4th pass equal channel angular pressing in micro-meso/scale. The two groups were further processed by micro/meso-scale extrusion before conducting MIU for fabricating tiny pins. Micro-upsetting test of the tiny pins showed that the material has a good isotropic flow forming and is free of undesirable defects comparing with the CG counterparts, which can be ascribed to the decreasing of grain boundary strengthening effect in the case of FG structure.
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