Roshaliza Hamidon
Thumbnail Image
Preferred name
Roshaliza Hamidon
Official Name
Roshaliza, Hamidon
Alternative Name
Hamidon, Roshaliza
Hamidon, R.
Main Affiliation
Scopus Author ID
54941292900
Researcher ID
ICQ-9949-2023

Research Output

Filters

2
1 1
2
2
Reset filters

Settings
Now showing 1 - 2 of 2
  • Publication
    Progressive tool wear in machining of aluminum alloy: The influence of solid lubricant nanoparticles
    ( 2021-01-01)
    Zailani Zainal Abidin
    ;
    Jaaffar N.S.
    ;
    Roshaliza Hamidon
    ;
    Harun A.
    ;
    Jaafar H.
    The abstract should summarize the contents of the paper in short terms, i.e. 150–250 words. Aluminum alloy 7075 are used in a variety of applications particularly in automotive and aerospace industry owing to their features of lightweight, high-strength and corrosion resistant properties. However, build up edge (BUE) and material adhesion either on cutting tool or workpiece render these materials difficult to machine. Their machining is associated with rapid tool wear and poor workpiece quality. Cutting fluids are currently the common solution to these problems although there are concerns on their use in terms of health footprint and environmental effects. Thus, new innovations are crucial to enhance the machinability as well as diminishing hazards through encouraging greener machining techniques. In this research, the use of solid lubricants; graphene and hexagonal boron nitride nanoparticles to augment minimum quantity lubricant were researched in macro drilling. Effects of four different machining conditions namely dry, minimum quantity lubricant, minimum quantity lubricant dispersed with graphene and hexagonal boron nitride nanoparticles were investigated on their progressive tool wear behavior. A notable finding is that the nanoparticles of solid lubricants had a significant factor in improving machinability of aluminum alloy 7075 compared to dry and minimum quantity lubricant alone. It was observed that the use of minimum quantity lubricant dispersed with hexagonal boron nitride demonstrated desirable tool life enhancement, tool wear reduction and number of holes drilled increment.
      2  27
  • Publication
    Improvement on the Surface Quality in Machining of Aluminum Alloy Involving Boron Nitride Nanoparticles
    ( 2021-01-01)
    Zailani Zainal Abidin
    ;
    Zaibi N.M.
    ;
    Roshaliza Hamidon
    ;
    Harun A.
    ;
    Muhammad Syahril Bahari
    ;
    Zakaria S.
    Aluminum Alloys are used in a variety of applications due to their lightweight, strength-to-weight ratio and relatively ease of fabrication. In aerospace industry, millions of holes drilled annually on airframe structures. Normally, cutting fluids have been used to help reduce friction and heat. However, the use of cutting fluid is one of the major concerns when considering the environmental issues in machining. The disposal of used cutting fluid poses problems to the environment. This research investigates the effect of greener technique; hexagonal Boron Nitride nanoparticles dispersed in oil as compared to dry cutting and oil alone in through hole drilling operation Their impact on tool wear, surface roughness, and holes quality in terms of diameter accuracy, circularity and cylindricity were experimentally studied. Results showed that application of hexagonal Boron Nitride improved surface finish and produced better dimensional hole accuracy. The work clearly shows the important of nanoparticles in improving machinability of this material.
      2  32