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Modification of Surface and Subsurface Properties of AA1050 Alloy by Shot Peening

AA1050 Al alloy samples were shot-peened using stainless-steel shots at shot peening (SP) pressures of 0.1 and 0.5 MPa and surface cover rates of 100% and 1000% using a custom-designed SP system. The hardness of shot-peened samples was around twice that of unpeened samples. Hardness increased with p...

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Autores principales: Avcu, Yasemin Yıldıran, Gönül, Berkay, Yetik, Okan, Sönmez, Fikret, Cengiz, Abdulkadir, Guney, Mert, Avcu, Egemen
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8585158/
https://www.ncbi.nlm.nih.gov/pubmed/34772101
http://dx.doi.org/10.3390/ma14216575
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author Avcu, Yasemin Yıldıran
Gönül, Berkay
Yetik, Okan
Sönmez, Fikret
Cengiz, Abdulkadir
Guney, Mert
Avcu, Egemen
author_facet Avcu, Yasemin Yıldıran
Gönül, Berkay
Yetik, Okan
Sönmez, Fikret
Cengiz, Abdulkadir
Guney, Mert
Avcu, Egemen
author_sort Avcu, Yasemin Yıldıran
collection PubMed
description AA1050 Al alloy samples were shot-peened using stainless-steel shots at shot peening (SP) pressures of 0.1 and 0.5 MPa and surface cover rates of 100% and 1000% using a custom-designed SP system. The hardness of shot-peened samples was around twice that of unpeened samples. Hardness increased with peening pressure, whereas the higher cover rate did not lead to hardness improvement. Micro-crack formation and embedment of shots occurred by SP, while average surface roughness increased up to 9 µm at the higher peening pressure and cover rate, indicating surface deterioration. The areal coverage of the embedded shots ranged from 1% to 5% depending on the peening parameters, and the number and the mean size of the embedded shots increased at the higher SP pressure and cover rate. As evidenced and discussed through the surface and cross-sectional SEM images, the main deformation mechanisms during SP were schematically described as crater formation, folding, micro-crack formation, and material removal. Overall, shot-peened samples demonstrated improved mechanical properties, whereas sample surface integrity only deteriorated notably during SP at the higher pressure, suggesting that selecting optimal peening parameters is key to the safe use of SP. The implemented methodology can be used to modify similar soft alloys within confined compromises in surface features.
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spelling pubmed-85851582021-11-12 Modification of Surface and Subsurface Properties of AA1050 Alloy by Shot Peening Avcu, Yasemin Yıldıran Gönül, Berkay Yetik, Okan Sönmez, Fikret Cengiz, Abdulkadir Guney, Mert Avcu, Egemen Materials (Basel) Article AA1050 Al alloy samples were shot-peened using stainless-steel shots at shot peening (SP) pressures of 0.1 and 0.5 MPa and surface cover rates of 100% and 1000% using a custom-designed SP system. The hardness of shot-peened samples was around twice that of unpeened samples. Hardness increased with peening pressure, whereas the higher cover rate did not lead to hardness improvement. Micro-crack formation and embedment of shots occurred by SP, while average surface roughness increased up to 9 µm at the higher peening pressure and cover rate, indicating surface deterioration. The areal coverage of the embedded shots ranged from 1% to 5% depending on the peening parameters, and the number and the mean size of the embedded shots increased at the higher SP pressure and cover rate. As evidenced and discussed through the surface and cross-sectional SEM images, the main deformation mechanisms during SP were schematically described as crater formation, folding, micro-crack formation, and material removal. Overall, shot-peened samples demonstrated improved mechanical properties, whereas sample surface integrity only deteriorated notably during SP at the higher pressure, suggesting that selecting optimal peening parameters is key to the safe use of SP. The implemented methodology can be used to modify similar soft alloys within confined compromises in surface features. MDPI 2021-11-01 /pmc/articles/PMC8585158/ /pubmed/34772101 http://dx.doi.org/10.3390/ma14216575 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
Avcu, Yasemin Yıldıran
Gönül, Berkay
Yetik, Okan
Sönmez, Fikret
Cengiz, Abdulkadir
Guney, Mert
Avcu, Egemen
Modification of Surface and Subsurface Properties of AA1050 Alloy by Shot Peening
title Modification of Surface and Subsurface Properties of AA1050 Alloy by Shot Peening
title_full Modification of Surface and Subsurface Properties of AA1050 Alloy by Shot Peening
title_fullStr Modification of Surface and Subsurface Properties of AA1050 Alloy by Shot Peening
title_full_unstemmed Modification of Surface and Subsurface Properties of AA1050 Alloy by Shot Peening
title_short Modification of Surface and Subsurface Properties of AA1050 Alloy by Shot Peening
title_sort modification of surface and subsurface properties of aa1050 alloy by shot peening
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8585158/
https://www.ncbi.nlm.nih.gov/pubmed/34772101
http://dx.doi.org/10.3390/ma14216575
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