Publication:
Chip morphology and surface integrity in turning AZ31 magnesium alloy under dry machining and submerged convective cooling

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cris.virtual.department Universiti Malaysia Perlis
cris.virtual.department Universiti Malaysia Perlis
cris.virtual.department Universiti Malaysia Perlis
cris.virtualsource.department 131d9ebb-8c8e-41d9-83fd-edba00ba8ebf
cris.virtualsource.department 09244f75-facc-4efc-a799-6f016384c56a
cris.virtualsource.department dddac5f4-97ee-45b9-a38a-4bf759a9c138
dc.contributor.author Muhammad Syamil Zakaria
dc.contributor.author Mazli Mustapha
dc.contributor.author Azwan Iskandar bin Azmi
dc.contributor.author Khor Chu Yee
dc.date.accessioned 2024-05-08T01:09:59Z
dc.date.available 2024-05-08T01:09:59Z
dc.date.issued 2023
dc.description.abstract Magnesium alloys have broad applications, including medical implants and the aerospace sector owing to their great density and high strength-to-weight ratio. Dry cutting is a frequent technique for machining this material. However, it always leads to an excessive rise in temperature due to the absence of cooling at the cutting zone, which affects the machined surface integrity and chip morphology. In this study, chip morphology and surface integrity of the AZ31 magnesium alloy were investigated in the turning process using an internal cooling method called submerged convective cooling (SCC) to overcome the absence of cooling in dry cutting. This method can exploit the advantage of the high specific heat capacity of water as a cooling fluid without any reaction between water and magnesium to create a cooling element in the cutting zone. The chip morphologies and surface integrity were analyzed experimentally with varying cutting speeds under SCC and dry cutting. The experimental results revealed that SCC and dry cutting produced saw-tooth or serrated chip formation. The chips produced in dry cutting were continuous, while SCC was short and discontinuous as a result of a severe crack on the back surface of the chip. It was discovered that the grain refinement layer on the machined samples was thinner under SCC turning. SCC machining increased the microhardness of the AZ31 magnesium alloy by 60.5% from 55 HV to 88.3 HV, while dry turning exhibited a 49% increase in microhardness. The result revealed that surface roughness improved by 10.8%, 9.4% and 4.7% for cutting speeds (V) of 120, 180, and 240 m/min, respectively, under the SCC internal cooling. Based on the result obtained, SCC cutting outperformed dry cutting in terms of chip breakability, grain refinement, microhardness, and surface roughness.
dc.identifier.doi 10.3390/met13030619
dc.identifier.uri https://www.mdpi.com/2075-4701/13/3/619/pdf
dc.identifier.uri https://www.mdpi.com/2075-4701/13/3/619/html
dc.identifier.uri https://hdl.handle.net/20.500.14170/2420
dc.language.iso en
dc.relation.ispartof Metals
dc.relation.issn 2075-4701
dc.subject Chip morphology
dc.subject Surface integrity
dc.subject Internal cooling
dc.subject Magnesium alloy
dc.subject Dry cutting
dc.title Chip morphology and surface integrity in turning AZ31 magnesium alloy under dry machining and submerged convective cooling
dc.type journal-article
dspace.entity.type Publication
oaire.citation.endPage 19
oaire.citation.issue 3
oaire.citation.startPage 1
oaire.citation.volume 13
oairecerif.author.affiliation Universiti Malaysia Perlis
oairecerif.author.affiliation Universiti Teknologi PETRONAS
oairecerif.author.affiliation Universiti Malaysia Perlis
oairecerif.author.affiliation Universiti Malaysia Perlis
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