Strain rate effects on the deformation behaviour and fracture mode of recycled aluminium alloys reinforced alumina oxide
In recent years, reinforcement with alumina oxide (Al2O3) has been considered to enhance the mechanical characteristics of recycled aluminium alloys. However, there is no established information on the deformation behaviour of such recycled material when subjected to various loading conditions, i...
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my.uthm.eprints.110492024-05-29T02:27:12Z http://eprints.uthm.edu.my/11049/ Strain rate effects on the deformation behaviour and fracture mode of recycled aluminium alloys reinforced alumina oxide Ma’at, Norzarina T Technology (General) In recent years, reinforcement with alumina oxide (Al2O3) has been considered to enhance the mechanical characteristics of recycled aluminium alloys. However, there is no established information on the deformation behaviour of such recycled material when subjected to various loading conditions, including damage progression. In addition, minimal efforts were conducted to develop numerical modeling to predict the deformation behaviour. Based on this motivation, a hybrid experimental-numerical approach is used in this research project. A hot press forging method is used to produce the specimen. The deformation behaviour, including damage progression of recycled AA6061 reinforced alumina oxide was investigated using the uniaxial tensile test at different strain rates (6×10-3 – 6×10-1 s-1) and the Taylor cylinder impact test at impact velocity ranging from 190 m/s – 370 m/s. The recycled AA6061 reinforced alumina oxide exhibits a strain-rate dependence behaviour and ductile-brittle elastoplastic from the experimental work. The mechanical properties of the recycled AA6061 reinforced alumina oxide are degraded due to the behaviour of alumina oxide (brittle) and damage progression under loading deformation. The Taylor cylinder impact tests showed three fracture modes (mushrooming, tensile splitting, and petalling) with a critical impact velocity of 280 m/s and also exhibits plastic anisotropic behaviour and antideformation solid capability. The increasing impact velocity increases the severity of damage progression of the recycled AA6061 reinforced alumina oxide. Metallurgical analysis showed that micro-voids were initiated in the pre-test specimen, and damage evolved due to the nucleation, growth, and coalescence of micro-voids when loading was applied. The numerical approach was performed in the finite element analysis using LS-DYNA to predict the deformation behaviour of recycled AA6061 reinforced alumina oxide. The Simplified Johnson-Cook model was chosen and the input parameters characterize based on uniaxial tensile test data. The simulation result was then validated against both tests' experimental data and showed a satisfactory agreement 2023-02 Thesis NonPeerReviewed text en http://eprints.uthm.edu.my/11049/1/24p%20NORZARINA%20MA%E2%80%99AT.pdf text en http://eprints.uthm.edu.my/11049/2/NORZARINA%20MA%E2%80%99AT%20COPYRIGHT%20DECLARATION.pdf text en http://eprints.uthm.edu.my/11049/3/NORZARINA%20MA%E2%80%99AT%20WATERMARK.pdf Ma’at, Norzarina (2023) Strain rate effects on the deformation behaviour and fracture mode of recycled aluminium alloys reinforced alumina oxide. Doctoral thesis, Universiti Tun Hussein Onn Malaysia. |
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In recent years, reinforcement with alumina oxide (Al2O3) has been considered to
enhance the mechanical characteristics of recycled aluminium alloys. However, there
is no established information on the deformation behaviour of such recycled material
when subjected to various loading conditions, including damage progression. In
addition, minimal efforts were conducted to develop numerical modeling to predict the
deformation behaviour. Based on this motivation, a hybrid experimental-numerical
approach is used in this research project. A hot press forging method is used to produce
the specimen. The deformation behaviour, including damage progression of recycled
AA6061 reinforced alumina oxide was investigated using the uniaxial tensile test at
different strain rates (6×10-3 – 6×10-1 s-1) and the Taylor cylinder impact test at impact
velocity ranging from 190 m/s – 370 m/s. The recycled AA6061 reinforced alumina
oxide exhibits a strain-rate dependence behaviour and ductile-brittle elastoplastic from
the experimental work. The mechanical properties of the recycled AA6061 reinforced
alumina oxide are degraded due to the behaviour of alumina oxide (brittle) and damage
progression under loading deformation. The Taylor cylinder impact tests showed three
fracture modes (mushrooming, tensile splitting, and petalling) with a critical impact
velocity of 280 m/s and also exhibits plastic anisotropic behaviour and antideformation
solid capability. The increasing impact velocity increases the severity of
damage progression of the recycled AA6061 reinforced alumina oxide. Metallurgical
analysis showed that micro-voids were initiated in the pre-test specimen, and damage
evolved due to the nucleation, growth, and coalescence of micro-voids when loading
was applied. The numerical approach was performed in the finite element analysis
using LS-DYNA to predict the deformation behaviour of recycled AA6061 reinforced
alumina oxide. The Simplified Johnson-Cook model was chosen and the input
parameters characterize based on uniaxial tensile test data. The simulation result was
then validated against both tests' experimental data and showed a satisfactory
agreement |
format |
Thesis |
author |
Ma’at, Norzarina |
author_facet |
Ma’at, Norzarina |
author_sort |
Ma’at, Norzarina |
title |
Strain rate effects on the deformation behaviour and fracture mode of recycled aluminium alloys reinforced alumina oxide |
title_short |
Strain rate effects on the deformation behaviour and fracture mode of recycled aluminium alloys reinforced alumina oxide |
title_full |
Strain rate effects on the deformation behaviour and fracture mode of recycled aluminium alloys reinforced alumina oxide |
title_fullStr |
Strain rate effects on the deformation behaviour and fracture mode of recycled aluminium alloys reinforced alumina oxide |
title_full_unstemmed |
Strain rate effects on the deformation behaviour and fracture mode of recycled aluminium alloys reinforced alumina oxide |
title_sort |
strain rate effects on the deformation behaviour and fracture mode of recycled aluminium alloys reinforced alumina oxide |
publishDate |
2023 |
url |
http://eprints.uthm.edu.my/11049/1/24p%20NORZARINA%20MA%E2%80%99AT.pdf http://eprints.uthm.edu.my/11049/2/NORZARINA%20MA%E2%80%99AT%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/11049/3/NORZARINA%20MA%E2%80%99AT%20WATERMARK.pdf http://eprints.uthm.edu.my/11049/ |
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