Direct recycling of aluminium alloy 6061 and 7075 employing cyclic extrusion compression back pressure technique

Direct recycling of aluminium alloy 6061 and 7075 employing cyclic extrusion compression back pressure technique

The direct recycling process is an alternative method of recycling waste of chip aluminium without melting the materials as compared to conventional recycling technique (secondary production). The cold compaction stage is the most crucial process of the direct recycling process. The billets density,...

Full description

Bibliographic Details
Main Author: Mohamad Syahmi, Shahrom
Format: Thesis
Language:English
English
English
Published: 2016
Subjects:
Q Science (General)
TS Manufactures
Online Access:http://umpir.ump.edu.my/id/eprint/16389/
http://umpir.ump.edu.my/id/eprint/16389/
http://umpir.ump.edu.my/id/eprint/16389/1/Direct%20recycling%20of%20aluminium%20alloy%206061%20and%207075%20employing%20cyclic%20extrusion%20compression%20back%20pressure%20technique-Table%20of%20contents-FKP-Mohamad%20Syahmi%20Shahrom-CD%209912.pdf
http://umpir.ump.edu.my/id/eprint/16389/7/Direct%20recycling%20of%20aluminium%20alloy%206061%20and%207075%20employing%20cyclic%20extrusion%20compression%20back%20pressure%20technique-Abstract-FKP-Mohamad%20Syahmi%20Shahrom-CD%209912.pdf
http://umpir.ump.edu.my/id/eprint/16389/8/Direct%20recycling%20of%20aluminium%20alloy%206061%20and%207075%20employing%20cyclic%20extrusion%20compression%20back%20pressure%20technique-References-FKP-Mohamad%20Syahmi%20Shahrom-CD%209912.pdf
id ump-16389
recordtype eprints
spelling ump-163892017-02-01T03:12:50Z http://umpir.ump.edu.my/id/eprint/16389/ Direct recycling of aluminium alloy 6061 and 7075 employing cyclic extrusion compression back pressure technique Mohamad Syahmi, Shahrom Q Science (General) TS Manufactures The direct recycling process is an alternative method of recycling waste of chip aluminium without melting the materials as compared to conventional recycling technique (secondary production). The cold compaction stage is the most crucial process of the direct recycling process. The billets density, b achieved through the cold compaction stage significantly influences the hardness (mechanical properties) and chip boundaries (microstructural properties). The problem of conventional compaction (direct compaction) presents low of b. The objective of this study is to develop the Cyclic Extrusion Compression Back Pressure (CECBP) technique to improve the b which influences the hardness and chip boundaries of aluminium alloy 6061 and 7075 chips in the direct recycling process. Taguchi Method was used as a tool to analyse and optimise the CECBP factors namely the pressure, P back pressure, Pb cycle time, tc and holding time, th. Different lubricant strategy techniques (flood, dry and minimum quantity lubricant (MQL) were used to obtain different types of aluminium chips. Conventional compaction (direct compaction technique) was used to get b value. The MQL showed the highest b results compared to flood and dry technique. The experimental results suggested that the CECBP technique is able to improve cyclic billets density cyb to 12.11% (AA6061) and 5.45 % (AA7075) compared to direct compaction technique. It is also established that the cyclic specimen hardness, Hcys and chip boundaries for both aluminium alloys improved when cyb value increased by using regression analysis. Pressure is identified to be the most significant factor in influencing the properties of cyb, cys and Hcys. In conclusion, CECBP technique had successfully improved the cold compaction stage for a direct recycling process and can used as direct recycling process of aluminium in industry. 2016-06 Thesis NonPeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/16389/1/Direct%20recycling%20of%20aluminium%20alloy%206061%20and%207075%20employing%20cyclic%20extrusion%20compression%20back%20pressure%20technique-Table%20of%20contents-FKP-Mohamad%20Syahmi%20Shahrom-CD%209912.pdf application/pdf en http://umpir.ump.edu.my/id/eprint/16389/7/Direct%20recycling%20of%20aluminium%20alloy%206061%20and%207075%20employing%20cyclic%20extrusion%20compression%20back%20pressure%20technique-Abstract-FKP-Mohamad%20Syahmi%20Shahrom-CD%209912.pdf application/pdf en http://umpir.ump.edu.my/id/eprint/16389/8/Direct%20recycling%20of%20aluminium%20alloy%206061%20and%207075%20employing%20cyclic%20extrusion%20compression%20back%20pressure%20technique-References-FKP-Mohamad%20Syahmi%20Shahrom-CD%209912.pdf Mohamad Syahmi, Shahrom (2016) Direct recycling of aluminium alloy 6061 and 7075 employing cyclic extrusion compression back pressure technique. Masters thesis, Universiti Malaysia Pahang. http://iportal.ump.edu.my/lib/item?id=chamo:98091&theme=UMP2
repository_type Digital Repository
institution_category Local University
institution Universiti Malaysia Pahang
building UMP Institutional Repository
collection Online Access
language English
English
English
topic Q Science (General)
TS Manufactures
spellingShingle Q Science (General)
TS Manufactures
Mohamad Syahmi, Shahrom
Direct recycling of aluminium alloy 6061 and 7075 employing cyclic extrusion compression back pressure technique
description The direct recycling process is an alternative method of recycling waste of chip aluminium without melting the materials as compared to conventional recycling technique (secondary production). The cold compaction stage is the most crucial process of the direct recycling process. The billets density, b achieved through the cold compaction stage significantly influences the hardness (mechanical properties) and chip boundaries (microstructural properties). The problem of conventional compaction (direct compaction) presents low of b. The objective of this study is to develop the Cyclic Extrusion Compression Back Pressure (CECBP) technique to improve the b which influences the hardness and chip boundaries of aluminium alloy 6061 and 7075 chips in the direct recycling process. Taguchi Method was used as a tool to analyse and optimise the CECBP factors namely the pressure, P back pressure, Pb cycle time, tc and holding time, th. Different lubricant strategy techniques (flood, dry and minimum quantity lubricant (MQL) were used to obtain different types of aluminium chips. Conventional compaction (direct compaction technique) was used to get b value. The MQL showed the highest b results compared to flood and dry technique. The experimental results suggested that the CECBP technique is able to improve cyclic billets density cyb to 12.11% (AA6061) and 5.45 % (AA7075) compared to direct compaction technique. It is also established that the cyclic specimen hardness, Hcys and chip boundaries for both aluminium alloys improved when cyb value increased by using regression analysis. Pressure is identified to be the most significant factor in influencing the properties of cyb, cys and Hcys. In conclusion, CECBP technique had successfully improved the cold compaction stage for a direct recycling process and can used as direct recycling process of aluminium in industry.
format Thesis
author Mohamad Syahmi, Shahrom
author_facet Mohamad Syahmi, Shahrom
author_sort Mohamad Syahmi, Shahrom
title Direct recycling of aluminium alloy 6061 and 7075 employing cyclic extrusion compression back pressure technique
title_short Direct recycling of aluminium alloy 6061 and 7075 employing cyclic extrusion compression back pressure technique
title_full Direct recycling of aluminium alloy 6061 and 7075 employing cyclic extrusion compression back pressure technique
title_fullStr Direct recycling of aluminium alloy 6061 and 7075 employing cyclic extrusion compression back pressure technique
title_full_unstemmed Direct recycling of aluminium alloy 6061 and 7075 employing cyclic extrusion compression back pressure technique
title_sort direct recycling of aluminium alloy 6061 and 7075 employing cyclic extrusion compression back pressure technique
publishDate 2016
url http://umpir.ump.edu.my/id/eprint/16389/
http://umpir.ump.edu.my/id/eprint/16389/
http://umpir.ump.edu.my/id/eprint/16389/1/Direct%20recycling%20of%20aluminium%20alloy%206061%20and%207075%20employing%20cyclic%20extrusion%20compression%20back%20pressure%20technique-Table%20of%20contents-FKP-Mohamad%20Syahmi%20Shahrom-CD%209912.pdf
http://umpir.ump.edu.my/id/eprint/16389/7/Direct%20recycling%20of%20aluminium%20alloy%206061%20and%207075%20employing%20cyclic%20extrusion%20compression%20back%20pressure%20technique-Abstract-FKP-Mohamad%20Syahmi%20Shahrom-CD%209912.pdf
http://umpir.ump.edu.my/id/eprint/16389/8/Direct%20recycling%20of%20aluminium%20alloy%206061%20and%207075%20employing%20cyclic%20extrusion%20compression%20back%20pressure%20technique-References-FKP-Mohamad%20Syahmi%20Shahrom-CD%209912.pdf
first_indexed 2023-09-18T22:22:01Z
last_indexed 2023-09-18T22:22:01Z
_version_ 1777415719266287616

Similar Items