Cargando…

Numerical and Experimental Investigation on the Surface Defect Generation during the Hot Extrusion of Al6063 Alloy

The surface quality control of extruded products is a critical concern in the home appliance manufacturing industry owing to the increasing need for products with a high surface quality, in addition to the essential mechanical properties of the final product. The underlying issue with achieving high...

Descripción completa

Detalles Bibliográficos
Autores principales: Park, Namsu, Song, Yeonghwan, Jung, Seon-Ho, Song, Junghan, Lee, Jongsup, Lee, Heejong, Sung, Hyun-Min, Bae, Gihyun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8622491/
https://www.ncbi.nlm.nih.gov/pubmed/34832172
http://dx.doi.org/10.3390/ma14226768
_version_ 1784605706345775104
author Park, Namsu
Song, Yeonghwan
Jung, Seon-Ho
Song, Junghan
Lee, Jongsup
Lee, Heejong
Sung, Hyun-Min
Bae, Gihyun
author_facet Park, Namsu
Song, Yeonghwan
Jung, Seon-Ho
Song, Junghan
Lee, Jongsup
Lee, Heejong
Sung, Hyun-Min
Bae, Gihyun
author_sort Park, Namsu
collection PubMed
description The surface quality control of extruded products is a critical concern in the home appliance manufacturing industry owing to the increasing need for products with a high surface quality, in addition to the essential mechanical properties of the final product. The underlying issue with achieving high-quality extrusion products is that surface defects, especially those resulting in surface gloss differences, called white line defects, are only observed after surface treatment. In this study, we aim to investigate the cause of white line defect generation on the surface of an extruded product. Accordingly, an experimental extrusion program is established using an L-shaped die that has a noticeable change in its bearing length along the inner corner of its cross-sectional profile. Laboratory-scale experiments were performed for the L-shaped extrusion of homogenized Al 6063 alloy at various ram speeds, in order to induce surface defects, considering the production yield rate required for mass production. Subsequently, the microstructural changes near the surface failure region were investigated using an arbitrary Lagrangian–Eulerian (ALE) technique-based thermomechanical finite element (FE) analysis. To scale-up the defect observation method from laboratory-scale to production-scale manufacturing and confirm the reproducibility of the surface defect, scaled-up L-shaped extrusions were performed in an actual industrial production line. Finally, the potential cause of white line defect generation is discussed by comparing the numerical and metallurgical analyses, including the scanning electron microscopy (SEM) and electron backscatter diffraction (EBSD) observations.
format Online
Article
Text
id pubmed-8622491
institution National Center for Biotechnology Information
language English
publishDate 2021
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-86224912021-11-27 Numerical and Experimental Investigation on the Surface Defect Generation during the Hot Extrusion of Al6063 Alloy Park, Namsu Song, Yeonghwan Jung, Seon-Ho Song, Junghan Lee, Jongsup Lee, Heejong Sung, Hyun-Min Bae, Gihyun Materials (Basel) Article The surface quality control of extruded products is a critical concern in the home appliance manufacturing industry owing to the increasing need for products with a high surface quality, in addition to the essential mechanical properties of the final product. The underlying issue with achieving high-quality extrusion products is that surface defects, especially those resulting in surface gloss differences, called white line defects, are only observed after surface treatment. In this study, we aim to investigate the cause of white line defect generation on the surface of an extruded product. Accordingly, an experimental extrusion program is established using an L-shaped die that has a noticeable change in its bearing length along the inner corner of its cross-sectional profile. Laboratory-scale experiments were performed for the L-shaped extrusion of homogenized Al 6063 alloy at various ram speeds, in order to induce surface defects, considering the production yield rate required for mass production. Subsequently, the microstructural changes near the surface failure region were investigated using an arbitrary Lagrangian–Eulerian (ALE) technique-based thermomechanical finite element (FE) analysis. To scale-up the defect observation method from laboratory-scale to production-scale manufacturing and confirm the reproducibility of the surface defect, scaled-up L-shaped extrusions were performed in an actual industrial production line. Finally, the potential cause of white line defect generation is discussed by comparing the numerical and metallurgical analyses, including the scanning electron microscopy (SEM) and electron backscatter diffraction (EBSD) observations. MDPI 2021-11-10 /pmc/articles/PMC8622491/ /pubmed/34832172 http://dx.doi.org/10.3390/ma14226768 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Park, Namsu
Song, Yeonghwan
Jung, Seon-Ho
Song, Junghan
Lee, Jongsup
Lee, Heejong
Sung, Hyun-Min
Bae, Gihyun
Numerical and Experimental Investigation on the Surface Defect Generation during the Hot Extrusion of Al6063 Alloy
title Numerical and Experimental Investigation on the Surface Defect Generation during the Hot Extrusion of Al6063 Alloy
title_full Numerical and Experimental Investigation on the Surface Defect Generation during the Hot Extrusion of Al6063 Alloy
title_fullStr Numerical and Experimental Investigation on the Surface Defect Generation during the Hot Extrusion of Al6063 Alloy
title_full_unstemmed Numerical and Experimental Investigation on the Surface Defect Generation during the Hot Extrusion of Al6063 Alloy
title_short Numerical and Experimental Investigation on the Surface Defect Generation during the Hot Extrusion of Al6063 Alloy
title_sort numerical and experimental investigation on the surface defect generation during the hot extrusion of al6063 alloy
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8622491/
https://www.ncbi.nlm.nih.gov/pubmed/34832172
http://dx.doi.org/10.3390/ma14226768
work_keys_str_mv AT parknamsu numericalandexperimentalinvestigationonthesurfacedefectgenerationduringthehotextrusionofal6063alloy
AT songyeonghwan numericalandexperimentalinvestigationonthesurfacedefectgenerationduringthehotextrusionofal6063alloy
AT jungseonho numericalandexperimentalinvestigationonthesurfacedefectgenerationduringthehotextrusionofal6063alloy
AT songjunghan numericalandexperimentalinvestigationonthesurfacedefectgenerationduringthehotextrusionofal6063alloy
AT leejongsup numericalandexperimentalinvestigationonthesurfacedefectgenerationduringthehotextrusionofal6063alloy
AT leeheejong numericalandexperimentalinvestigationonthesurfacedefectgenerationduringthehotextrusionofal6063alloy
AT sunghyunmin numericalandexperimentalinvestigationonthesurfacedefectgenerationduringthehotextrusionofal6063alloy
AT baegihyun numericalandexperimentalinvestigationonthesurfacedefectgenerationduringthehotextrusionofal6063alloy