Forthcoming and Online First Articles

International Journal of Machining and Machinability of Materials

International Journal of Machining and Machinability of Materials (IJMMM)

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International Journal of Machining and Machinability of Materials (5 papers in press)

Regular Issues

  • Investigation of Graphene based biodegradable acid oil as a plausible green metal working fluid in micro-drilling of Nimonic 90 superalloy   Order a copy of this article
    by Pratik Patil, Sachin K. Patil 
    Abstract: Nickel-based superalloys like Nimonic 90, play a crucial role in aero engine industries due to their exceptional thermal and corrosion resistance. Micro-drilling is essential for manufacturing engine components, but it poses challenges, particularly early tool damage in the case of nickel-based superalloys. Conventional mineral oil-based metal working fluids (MWFs) contribute to environmental and health issues. This study explores the use of biodegradable acid oil as an eco-friendly MWF in micro-drilling thermal barrier coated Nimonic 90. Tungsten carbide drills with Titanium aluminium nitride coating were employed under dry, flood, and nanofluid minimum quantity lubrication (NMQL) conditions at varying spindle speeds. Results indicate that NMQL, especially with a 0.5% weight concentration of graphene, achieves the lowest drilling temperature and minimal tool wear, making it a promising environmentally friendly alternative for micro-drilling nickel-based superalloys like Nimonic 90.
    Keywords: micro-drill; Nimonic 90 superalloy; biodegradable; acid oil; metal working fluids; thermal barrier coating; graphene nanofluid.
    DOI: 10.1504/IJMMM.2024.10062131
     
  • Machinability assessment of Inconel 718 under magnetic annealing   Order a copy of this article
    by Vishnu Sanap, Vasudev D. Shinde 
    Abstract: The machinability of Inconel 718 is assessed with and without magnetic annealed of the turning process under dry run. It was observed that as cutting speed increases, the shape of chips changes from continuous thick to small elemental chips, but as feed increases at constant cutting speed, thick chips are produced due to the large chip area available. Besides, the distance between two successive teeth and the valley of chips changes as the cutting condition changes, and the lowest distance between two teeth is observed at lower cutting speeds and feed rates. Besides, better surface roughness is observed at lower cutting speeds and lower feed rates due to lower tool wear. As the cutting speed and feed increase, the roughness of the workpiece gets reduced, and tool wear increases rapidly. The magnetic annealed condition, higher surface roughness, a lower tool wear rate, and an elemental chip shape were observed.
    Keywords: Inconel-718; magnetic; annealing; surface; wear; chip morphology.
    DOI: 10.1504/IJMMM.2024.10063181
     
  • Experimental study on hole quality characteristics in abrasive waterjet machining of quartz cyanate ester polymeric composite   Order a copy of this article
    by T. Ramalingam , N. Kishore Nath , N. Selvaraj  
    Abstract: Quartz polymeric fibre with cyanate ester resin make composite which finds significance in military applications due to its high performance and excellent properties. To obtain quality holes, abrasive waterjet machining (AWJM) is considered a promising non-conventional process because of its excellent machining characteristics. This study is aimed to machine hole on quartz composite using AWJM and analyse the effect of process parameters namely waterjet pressure (P), standoff distance (Sd) and abrasive flow rate (ma). Hole quality characteristics namely delamination factor, diameter, cylindricity and surface roughness are considered. Vacuum assisted resin transfer moulding (VARTM) process was adopted for manufacturing of the laminate. Full factorial design was considered and experiments were carried out. Results showed that the maximum influence on delamination, diameter, cylindricity is by waterjet pressure and its corresponding contributions are 36.98%, 80.19%, 59.29% respectively. Similarly, the major influence on surface roughness is standoff distance and its contribution is 39.08%. Further, optimal solution was obtained and validated with regression equations with a maximum error of 9.11%.
    Keywords: quartz polymeric composite; abrasive waterjet; resin transfer moulding; hole quality; regression modelling; optimisation; delamination.
    DOI: 10.1504/IJMMM.2024.10063819
     
  • Performance of profile characteristics at different machining parameters during wire electric discharge slant type taper profiling on Nicrofer 4722   Order a copy of this article
    by I.V. Manoj, S. Narendra Nath 
    Abstract: In the present study, a slant type taper fixture is employed to achieve taper machining by wire electric discharge machining. Machining parameters like wire distance between the guides (WD), wire offset (WO), corner-dwell time (CT) and cutting-speed override (CO) is used to produce tapered components at 0
    Keywords: slant type fixture; WEDM; profile roughness; profiling error; PE; corner shift; recast layer thickness; micro-hardness.
    DOI: 10.1504/IJMMM.2024.10063926
     
  • Improvement of Surface Quality in Electric Discharge Machining of Metal Matrix Composite by using Hybrid approach   Order a copy of this article
    by Ram Sajeevan, Avanish Kumar Dubey 
    Abstract: Surface integrity (SI) obtained after electrical discharge machining (EDM) is an important surface quality parameter that needs attention. Micro-hardness (MH), recast layer thickness (RLT) and micro-cracks (MCs) are few important SI parameters of EDM surface. Nowadays, researchers are very serious to improve these parameters by hybridising the EDM with other mechanisms, Keeping this in view, magnetic force-assisted powder mixed EDM (MFPEDM) was proposed for this study. The present research article aims is to compare the machining performances of the MFPEDM with the conventional EDM (CEDM) on the machined surface of aluminium titanium die-boride (Al-TiB2) metal matrix composite (MMC). And study have also been carried out the modelling and optimisation of the machining performances of MFPEDM and CEDM by using a hybrid approach of artificial neural network-genetic algorithm (ANN-GA). The comparison results elucidate that MFPEDM, has praiseworthy improvement in MH, RLT, and MCs at average values and optimum values when compared with CEDM.
    Keywords: electrical discharge machining; EDM; metal matrix composite; MMC; MFPEDM; micro-cracks; micro-hardness; recast layer thickness; RLT.
    DOI: 10.1504/IJMMM.2024.10064066