Influence of agglomeration phenomenon in machining of AISI D2 hardened steel using nano chromium powder mixed-EDM

The Powder Mixed-Electrical Discharge Machining (PMEDM), as an influential environment, has been proven to overcome the challenges of dielectric liquids impedance, machinability, and surface integrity problems. Also, the additive powder particles played a vital role in this enhancement. Nevert...

Full description

Saved in:
Bibliographic Details
Main Author: Abbas, Mohammed Abdulridha
Format: Thesis
Language:English
English
English
Published: 2020
Subjects:
Online Access:http://eprints.uthm.edu.my/911/1/24p%20MOHAMMED%20ABDULRIDHA%20ABBAS.pdf
http://eprints.uthm.edu.my/911/2/MOHAMMED%20ABDULRIDHA%20ABBAS%20COPYRIGHT%20DECLARATION.pdf
http://eprints.uthm.edu.my/911/3/MOHAMMED%20ABDULRIDHA%20ABBAS%20WATERMARK.pdf
http://eprints.uthm.edu.my/911/
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Universiti Tun Hussein Onn Malaysia
Language: English
English
English
id my.uthm.eprints.911
record_format eprints
spelling my.uthm.eprints.9112021-09-09T02:44:29Z http://eprints.uthm.edu.my/911/ Influence of agglomeration phenomenon in machining of AISI D2 hardened steel using nano chromium powder mixed-EDM Abbas, Mohammed Abdulridha TJ1125-1345 Machine shops and machine shop practice The Powder Mixed-Electrical Discharge Machining (PMEDM), as an influential environment, has been proven to overcome the challenges of dielectric liquids impedance, machinability, and surface integrity problems. Also, the additive powder particles played a vital role in this enhancement. Nevertheless, this environment suffers from the powder agglomeration phenomenon, as abnormal behaviour, resulting in the dropping of the performance of PMEDM. Accordingly, the present work aims to neutralize this phenomenon during machining AISI D2 hardened steel in PMEDM environment by employing 10, 15, and 20 Amps; 20, 25, and 30 μs; 2, 4, and 6 g/L for peak current (IP), pulse duration (Ton), Nano Chromium Powder (NCP) concentration (PC), respectively. These parameters, which are produced by Finite Element Analysis (FEA), predicted the boundaries, as the pilot procedure, to avoid the collapse of the removal operation. Digital Balance, SJ400 Mitutoyo, Shimadzu Vickers's tester, and SEM/EDS-Hitachi SU-1510 were invested to specify the Material Removal Rate (MRR), Tool Wear Rate (TWR), average surface roughness (Ra), Microhardness (MH), Recast Layer Thickness (RLT), and agglomeration ratio (%AG) after machining. Depending on Energy Dispersive X-Ray Spectroscopy (EDS) observations before and after machining stages, the weight percentage of chromium element reduced from 7.78% to (3.12% to 6.68%). Hence, NCP particles have not agglomerated in the interelectrode gap zone. Furthermore, the carbon and other elements agglomeration contributed in enhancing the microhardness from (655 to 675) HV to (784 to 911.65) HV. The Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS)-Analyses of Variance (ANOVA)-Response Surface Methodology (RSM), as hybrid optimization, boosted the composite desirability of Multiple-Response optimization produced by RSM from 0.6153 to 0.9997. Moreover, this hybrid technique has determined IP = 10 Amps, Ton = 30 μs, and PC = 2 g/L; IP = 20 Amps, Ton = 20 μs, and PC = 6 g/L, as the optimal and worse cases, respectively. Accordingly, the predictive cost, according to the optimal-case, has declined by 40.23% as compared to the worse case. 2020-05 Thesis NonPeerReviewed text en http://eprints.uthm.edu.my/911/1/24p%20MOHAMMED%20ABDULRIDHA%20ABBAS.pdf text en http://eprints.uthm.edu.my/911/2/MOHAMMED%20ABDULRIDHA%20ABBAS%20COPYRIGHT%20DECLARATION.pdf text en http://eprints.uthm.edu.my/911/3/MOHAMMED%20ABDULRIDHA%20ABBAS%20WATERMARK.pdf Abbas, Mohammed Abdulridha (2020) Influence of agglomeration phenomenon in machining of AISI D2 hardened steel using nano chromium powder mixed-EDM. Doctoral thesis, Universiti Tun Hussein Onn Malaysia.
institution Universiti Tun Hussein Onn Malaysia
building UTHM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Tun Hussein Onn Malaysia
content_source UTHM Institutional Repository
url_provider http://eprints.uthm.edu.my/
language English
English
English
topic TJ1125-1345 Machine shops and machine shop practice
spellingShingle TJ1125-1345 Machine shops and machine shop practice
Abbas, Mohammed Abdulridha
Influence of agglomeration phenomenon in machining of AISI D2 hardened steel using nano chromium powder mixed-EDM
description The Powder Mixed-Electrical Discharge Machining (PMEDM), as an influential environment, has been proven to overcome the challenges of dielectric liquids impedance, machinability, and surface integrity problems. Also, the additive powder particles played a vital role in this enhancement. Nevertheless, this environment suffers from the powder agglomeration phenomenon, as abnormal behaviour, resulting in the dropping of the performance of PMEDM. Accordingly, the present work aims to neutralize this phenomenon during machining AISI D2 hardened steel in PMEDM environment by employing 10, 15, and 20 Amps; 20, 25, and 30 μs; 2, 4, and 6 g/L for peak current (IP), pulse duration (Ton), Nano Chromium Powder (NCP) concentration (PC), respectively. These parameters, which are produced by Finite Element Analysis (FEA), predicted the boundaries, as the pilot procedure, to avoid the collapse of the removal operation. Digital Balance, SJ400 Mitutoyo, Shimadzu Vickers's tester, and SEM/EDS-Hitachi SU-1510 were invested to specify the Material Removal Rate (MRR), Tool Wear Rate (TWR), average surface roughness (Ra), Microhardness (MH), Recast Layer Thickness (RLT), and agglomeration ratio (%AG) after machining. Depending on Energy Dispersive X-Ray Spectroscopy (EDS) observations before and after machining stages, the weight percentage of chromium element reduced from 7.78% to (3.12% to 6.68%). Hence, NCP particles have not agglomerated in the interelectrode gap zone. Furthermore, the carbon and other elements agglomeration contributed in enhancing the microhardness from (655 to 675) HV to (784 to 911.65) HV. The Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS)-Analyses of Variance (ANOVA)-Response Surface Methodology (RSM), as hybrid optimization, boosted the composite desirability of Multiple-Response optimization produced by RSM from 0.6153 to 0.9997. Moreover, this hybrid technique has determined IP = 10 Amps, Ton = 30 μs, and PC = 2 g/L; IP = 20 Amps, Ton = 20 μs, and PC = 6 g/L, as the optimal and worse cases, respectively. Accordingly, the predictive cost, according to the optimal-case, has declined by 40.23% as compared to the worse case.
format Thesis
author Abbas, Mohammed Abdulridha
author_facet Abbas, Mohammed Abdulridha
author_sort Abbas, Mohammed Abdulridha
title Influence of agglomeration phenomenon in machining of AISI D2 hardened steel using nano chromium powder mixed-EDM
title_short Influence of agglomeration phenomenon in machining of AISI D2 hardened steel using nano chromium powder mixed-EDM
title_full Influence of agglomeration phenomenon in machining of AISI D2 hardened steel using nano chromium powder mixed-EDM
title_fullStr Influence of agglomeration phenomenon in machining of AISI D2 hardened steel using nano chromium powder mixed-EDM
title_full_unstemmed Influence of agglomeration phenomenon in machining of AISI D2 hardened steel using nano chromium powder mixed-EDM
title_sort influence of agglomeration phenomenon in machining of aisi d2 hardened steel using nano chromium powder mixed-edm
publishDate 2020
url http://eprints.uthm.edu.my/911/1/24p%20MOHAMMED%20ABDULRIDHA%20ABBAS.pdf
http://eprints.uthm.edu.my/911/2/MOHAMMED%20ABDULRIDHA%20ABBAS%20COPYRIGHT%20DECLARATION.pdf
http://eprints.uthm.edu.my/911/3/MOHAMMED%20ABDULRIDHA%20ABBAS%20WATERMARK.pdf
http://eprints.uthm.edu.my/911/
_version_ 1738580798149230592