Development of Zirconia Reinforced AA7075/AA7050 Aluminum Chip-Based Composite Processed Using Hot Press Forging Method
The solid-state recycling technique has gained significant attention for its ability to reduce metal losses, energy consumption, and solid waste. This study introduced solid-state recycling method to develop zirconia-reinforced AA7075/AA7050 aluminum chip-based matrix composite via a hot press fo...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Universitas Indonesia
2023-07-01
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| Series: | International Journal of Technology |
| Subjects: | |
| Online Access: | https://ijtech.eng.ui.ac.id/article/view/6032 |
| Summary: | The solid-state recycling technique has gained significant
attention for its ability to reduce metal losses, energy consumption, and solid
waste. This study introduced solid-state recycling method to develop zirconia-reinforced
AA7075/AA7050 aluminum chip-based matrix composite via a hot press forging
process (HPF). The chips were cold-compacted at 35 tons and then hot-forged
through a dog bone-shaped die. Full factorial and response surface methodology
(RSM) designs were applied using Minitab 18 software. The Face Centred
Composite (CCF) of RSM was adopted to rank each factor's effect and analyze
interactions between input factors and output responses, followed by process
optimization. The selected factors of temperature (Tp) and volume fraction of
zirconia (ZrO2) nanoparticles (Vf) were set at 450, 500, and 550 °C
with 5, 10, and 15 wt %, respectively. The analyzed responses were ultimate
tensile strength (UTS) and microhardness (MH). SEM micrograph revealed a slightly
uniform distribution of ZrO2 particles in the matrix. The developed
composite gained the maximum strength of 262.52 MPa, a microhardness of 135.5
HV and a density of 2.828 g/cm3 at 550 °C and 10 wt % setting. RSM
optimization results suggested 550 °C and 10.15 wt % as optimal conditions
for maximum UTS and MH. The preheating temperature exhibited a more
significant influence than the ZrO2 volume fraction on the
composite's mechanical properties; however, both had a slight effect on grain
size. The future prospects of this work are briefly addressed at the end. In
conclusion, the HPF process was found to be an efficient recycling method for
mitigating environmental impacts by conserving energy and materials. |
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| ISSN: | 2086-9614 2087-2100 |