Analysis of Strengthening Mechanisms in an Artificially Aged Ultrafine Grain 6061 Aluminum Alloy
The current study adopted a quantitative approach to investigating the mechanical properties, and their relationship to the microstructural features, of precipitation-strengthened 6061 aluminum alloy processed through accumulative roll bonding (ARB) and aging heat treatment. To serve this purpose,...
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2017-12-01
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doaj-d8974f3117f24ce9b7fe4a56994cc3512020-11-24T21:11:13ZengUniversity of TehranJournal of Ultrafine Grained and Nanostructured Materials2423-68452423-68372017-12-0150215216010.22059/JUFGNSM.2017.02.1064249Analysis of Strengthening Mechanisms in an Artificially Aged Ultrafine Grain 6061 Aluminum AlloyMohammad Reza Rezaei0Mohammadreza Toroghinezhad1Fakhreddin Ashrafizadeh2School of Engineering, Damghan University, Damghan, Iran.Department of Materials Engineering, Isfahan University of Technology, Isfahan, Iran.Department of Materials Engineering, Isfahan University of Technology, Isfahan, Iran.The current study adopted a quantitative approach to investigating the mechanical properties, and their relationship to the microstructural features, of precipitation-strengthened 6061 aluminum alloy processed through accumulative roll bonding (ARB) and aging heat treatment. To serve this purpose, the contributions of different strengthening mechanisms including grain refinement, precipitation, dislocation and solid-solution strengthening to the yield strength of five-cycle ARB samples processed under pre-aged (ARBed) and aged (ARBed+Aged) conditions were examined and compared. Microstructural characterizations were performed on the samples through the transmission electron microscope (TEM) and X-ray diffraction (XRD). Also, the mechanical properties of the samples were investigated through the tensile test. The obtained results showed that an equiaxed ultrafine grain structure with nano-sized precipitates was created in the both ARBed and ARBed+Aged samples. The grain refinement was the predominant strengthening mechanism which was estimated to contribute 151 and 226 MPa to the ARBed and ARBed+Aged samples, respectively, while the dislocation and Orowan strengthening mechanisms were ranked second with regard to their contributions to the ARBed and ARBed+Aged samples, respectively. The overall yield strength, calculated through the root mean square summation method, was found to be in good agreement with the experimentally determined yield strength. It was also found that the presence of non-shearable precipitates, which interfered with the movement of the dislocations, would be effective for the simultaneous improvement of the strength and ductility of the ARBed+Agedsample .https://jufgnsm.ut.ac.ir/article_64249_28d2b887839c77be33a41185370a21cc.pdfAccumulative roll bonding (ARB)AgingStrengthening mechanismsmicrostructuremechanical properties |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Mohammad Reza Rezaei Mohammadreza Toroghinezhad Fakhreddin Ashrafizadeh |
spellingShingle |
Mohammad Reza Rezaei Mohammadreza Toroghinezhad Fakhreddin Ashrafizadeh Analysis of Strengthening Mechanisms in an Artificially Aged Ultrafine Grain 6061 Aluminum Alloy Journal of Ultrafine Grained and Nanostructured Materials Accumulative roll bonding (ARB) Aging Strengthening mechanisms microstructure mechanical properties |
author_facet |
Mohammad Reza Rezaei Mohammadreza Toroghinezhad Fakhreddin Ashrafizadeh |
author_sort |
Mohammad Reza Rezaei |
title |
Analysis of Strengthening Mechanisms in an Artificially Aged Ultrafine Grain 6061 Aluminum Alloy |
title_short |
Analysis of Strengthening Mechanisms in an Artificially Aged Ultrafine Grain 6061 Aluminum Alloy |
title_full |
Analysis of Strengthening Mechanisms in an Artificially Aged Ultrafine Grain 6061 Aluminum Alloy |
title_fullStr |
Analysis of Strengthening Mechanisms in an Artificially Aged Ultrafine Grain 6061 Aluminum Alloy |
title_full_unstemmed |
Analysis of Strengthening Mechanisms in an Artificially Aged Ultrafine Grain 6061 Aluminum Alloy |
title_sort |
analysis of strengthening mechanisms in an artificially aged ultrafine grain 6061 aluminum alloy |
publisher |
University of Tehran |
series |
Journal of Ultrafine Grained and Nanostructured Materials |
issn |
2423-6845 2423-6837 |
publishDate |
2017-12-01 |
description |
The current study adopted a quantitative approach to investigating the mechanical properties, and their relationship to the microstructural features, of precipitation-strengthened 6061 aluminum alloy processed through accumulative roll bonding (ARB) and aging heat treatment. To serve this purpose, the contributions of different strengthening mechanisms including grain refinement, precipitation, dislocation and solid-solution strengthening to the yield strength of five-cycle ARB samples processed under pre-aged (ARBed) and aged (ARBed+Aged) conditions were examined and compared. Microstructural characterizations were performed on the samples through the transmission electron microscope (TEM) and X-ray diffraction (XRD). Also, the mechanical properties of the samples were investigated through the tensile test. The obtained results showed that an equiaxed ultrafine grain structure with nano-sized precipitates was created in the both ARBed and ARBed+Aged samples. The grain refinement was the predominant strengthening mechanism which was estimated to contribute 151 and 226 MPa to the ARBed and ARBed+Aged samples, respectively, while the dislocation and Orowan strengthening mechanisms were ranked second with regard to their contributions to the ARBed and ARBed+Aged samples, respectively. The overall yield strength, calculated through the root mean square summation method, was found to be in good agreement with the experimentally determined yield strength. It was also found that the presence of non-shearable precipitates, which interfered with the movement of the dislocations, would be effective for the simultaneous improvement of the strength and ductility of the ARBed+Agedsample . |
topic |
Accumulative roll bonding (ARB) Aging Strengthening mechanisms microstructure mechanical properties |
url |
https://jufgnsm.ut.ac.ir/article_64249_28d2b887839c77be33a41185370a21cc.pdf |
work_keys_str_mv |
AT mohammadrezarezaei analysisofstrengtheningmechanismsinanartificiallyagedultrafinegrain6061aluminumalloy AT mohammadrezatoroghinezhad analysisofstrengtheningmechanismsinanartificiallyagedultrafinegrain6061aluminumalloy AT fakhreddinashrafizadeh analysisofstrengtheningmechanismsinanartificiallyagedultrafinegrain6061aluminumalloy |
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