Tan Chye Lih
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Preferred name
Tan Chye Lih
Official Name
Tan, Chye Lih
Alternative Name
Lih, T. C.
Chye Lih, Tan
Lih, Chye T.
Tan, C. L.
Tan, C. L.C.
Main Affiliation
Scopus Author ID
57125260200
Researcher ID
DYK-2514-2022

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Roles of eco-friendly non-edible vegetable oils in drilling Inconel 718 through minimum quantity lubrication

2022-09-01 , Safie N.S.S. , Muhamad Nasir Murad , Tan Chye Lih , Azwan Iskandar Azmi , Wan Hamzah W.A. , Danish M.

Metal cutting fluids (MCFs) have played a principal role as coolants and lubricants in the machining industry. However, the wide use of mineral-based oil MCFs has contributed to an adverse effect on humans and the environment. Thus, to overcome the adverse effects of mineral-based oil MCFs, eco-friendly vegetable oil, which is non-edible oil, has been implemented to overcome the issues related to edible oil such as manufacturing costs and food shortages. This study investigated the performance of three different types of non-edible oil, namely castor, neem, and rice bran oils in drilling Inconel 718 using a coated titanium aluminum nitride (TiAlN) carbide drill towards tool life, tool wear, surface integrity, dimensional accuracy, and chip thickness. The MCFs were implemented under the minimum quantity lubrication (MQL) condition at a 50 mL/h flow rate using different cutting speeds (10, 20 m/min) and a constant feed (0.015 mm/rev). The results showed that castor oil minimizes the rapid growth of tool wear and prolongs the tool life by 50% at 10 m/min as compared to rice bran oil. At 20 m/min, castor oil obtained the lowest values of average surface roughness (1.455 µm) and chip thickness (0.220 mm). It was also found that different cutting speeds did not contribute to any significant trend towards hole diameter and roundness for all MCFs. The outstanding performance of castor oil proved that the oil is a potential alternative as an eco-friendly MCF for a cleaner machining environment. Castor oil was determined to be optimum in terms of tool life, tool wear, surface roughness, and chip thickness.

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Electrical discharge coating of NiTi alloy in deionized water

2021-01-01 , Jamaluddin R. , Tan Chye Lih , Roshaliza Hamidon , Ahmad Fairuz Mansor , Azwan Iskandar Azmi

Shape memory alloys, specifically nickel-titanium (NiTi), exhibit excellent technical properties that suited them for biomedical applications. However, the release of nickel ions into human body is a drawback because it results in severe adverse health effects as well as degrades the biocompatibility of the alloys. In this work, surface modification through adaptation of electrical discharge machining was used to develop a deposition layer of titanium oxide on NiTi alloy surface. The adaptation was through electrical discharge coatings (EDC) parameters such as polarity, gap voltage, and erosion depth that were set up to study their effects on the experimental performance. The experiment was parameterized by implementing 2 level of full factorial design with ANOVA analysis to measure the surface roughness of that machined surface. One-factor-at-a-time, OFAT method is applied for XRD analysis by adopting the previous parameters approach. The EDC process was aided with deionized water and pure titanium rod as the dielectric fluids and electrodes, respectively. It was determined that the high level of gap voltage provided some major constituents on the surface of NiTi alloy based on XRD analysis. As apparent, this substantiated the presence of the tool materials and their oxide layer phases. The interaction of polarity and gap voltage also indicated a significant effect towards the surface roughness.

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Effects of machining conditions on the specific cutting energy of carbon fibre reinforced polymer composites

2017-10-29 , Azwan Iskandar Azmi , Syahmi A. , Naquib M. , Tan Chye Lih , Ahmad Fairuz Mansor , Khalil A.

This article presents an approach to evaluate the effects of different machining conditions on the specific cutting energy of carbon fibre reinforced polymer composites (CFRP). Although research works in the machinability of CFRP composites have been very substantial, the present literature rarely discussed the topic of energy consumption and the specific cutting energy. A series of turning experiments were carried out on two different CFRP composites in order to determine the power and specific energy constants and eventually evaluate their effects due to the changes in machining conditions. A good agreement between the power and material removal rate using a simple linear relationship. Further analyses revealed that a power law function is best to describe the effect of feed rate on the changes in the specific cutting energy. At lower feed rate, the specific cutting energy increases exponentially due to the nature of finishing operation, whereas at higher feed rate, the changes in specific cutting energy is minimal due to the nature of roughing operation.

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Translaminar fracture toughness of discontinuous, aligned flax fibre composites

2020-01-01 , Canturri C. , Tran L.Q.N. , Tan Chye Lih , Teo W.S.

This paper describes the results of an investigation into Mode I translaminar critical strain energy release rate of continuous laminates and slit-cut laminates. The aims of the work were to define the fracture properties of flax-epoxy prepreg laminates for component design and to investigate the active fracture mechanisms. Compact tension tests were performed using cross ply unidirectional laminates, one with continuous 0° plies and one with slit cuts in the 0° plies. The behaviour of the material observed during the test revealed a lower initiation critical energy release rate for the discontinuous laminates. The R-curve was only established for the discontinuous laminates and showed a rising behaviour due to bridging of the interfaces. It was found that different fracture mechanisms acted in the two laminates, single fibre pull-out was observed in the continuous laminates and bundle pull-out was observed in the discontinuous laminates.

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Hybrid Mahalanobis Taguchi System with Binary Whale Optimisation Feature Selection for the Wisconsin Breast Cancer Dataset

2023 , Chow Yong Huan , Wan Zuki Azman Wan Muhamad , Zainor Ridzuan Yahya , Nor Hizamiyani Abdul Azziz , Tan Chye Lih , Tan Xiao Jian

The Mahalanobis-Taguchi System (MTS) is a statistical approach used in breast cancer research to facilitate early detection and promote efficient treatment. The technique analyses mammogram images for significant features using a multivariate statistical analysis technique. It combines the Mahalanobis distance (MD) and Taguchi's method to determine the differences between benign and malignant samples. While orthogonal array (OA) has been widely used in MTS, it has been criticised for providing suboptimal results due to insufficient coverage of feature combinations during the feature optimisation process. To address this issue, the Binary Whale Optimisation Algorithm (BWOA) is proposed as an improved search algorithm for MTS. This paper aims to develop a novel hybrid method that enhances the efficiency of the Mahalanobis Taguchi System (MTS). The performance of feature selection ability due to different MTS hybrid algorithms were also compared. BWOA simulates the hunting behaviour of humpback whales and works by exploring new regions of the solution space, gradually narrowing the search space, and fine-tuning the solution. MTS-BWOA demonstrated its enhanced capability in feature optimisation compared to traditional MTS methods and has the potential to be applied in other medical imaging domains.

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Experimental and analytical study of drilling hybrid glass/carbon fibre reinforced epoxy composite

2016 , Tan Chye Lih

Hybrid composites have become increasingly attractive in research and development activities in recent times due to the capabilities to tailor their mechanical performance or characteristics to specific needs. Current research and innovation in the field of hybrid composites include processing, development and testing of metal matrix hybrid composites as well as the synthetic and natural fibre hybrid composites. Nonetheless, a number of complications arise in the manufacturing processes, particularly in machining such as drilling, of these multiphase laminated materials. The fact is that machining of composites or hybrid composites presents a great challenge due to anisotropic nature of the material, lack of plastic deformation and abrasiveness of the fibre reinforcements. According to the previous statistic studies, unqualified holes leads to approximately 60 % part rejections during the final assembly process. Therefore, this research study pursues an experimental and analytical approaches to extend the fundamental knowledge in drilling hybrid fibre reinforced polymer (FRP) composites. Prior to the drilling tests, the evaluations of the mechanical performance of hybrid FRP composite have been attempted. Specifically, the hybrid effect of the plain woven carbon and E-glass fibres hybrid composites within an epoxy polymer matrix was experimentally evaluated. It was evident that the physical properties and mechanical strength of monolithic fibres composite were enhanced 48 % by hybridising carbon fibres into the glass FRP composites. In addition, theoretical analysis through the rule of mixture reveals that the hybrid FRP composites have exhibited a positive hybrid effect in term of tensile and flexural behaviors. Even though fabrication technology for the hybrid FRP composites has well advanced in the production of near-net shape components, the secondary machining process is vital for completing the postmanufactured of these materials. Thus, the desired setting for minimising the delamination damage and surface roughness were determined using the Taguchi methodology and statistical analyses.

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Surface roughness analysis of NiTi alloy in electrical discharge coating process

2020-12-18 , Jamaluddin Roshalliza , Tan Chye Lih , Ahmad Fairuz Mansor , Azwan Iskandar Azmi , Roshaliza Hamidon

Nickel-Titanium (NiTi) alloys, most widely known as nitinol, are presently employed in many micro-engineering applications such as coronary stents of medical implants due to their unique properties (shape memory effect and superelasticity). However, non-optimized surface finishing attributed a significantly high potential of nickel exposure after a long time of application. Releasing of nickel ion to the body environment can be harmful and toxicity resulting in adverse health as well as degrading the material biocompatibility. It is widely known that controlled surface roughness play a vital role in the formation of new bone ingrowths around implant. In this study, surface modification of NiTi alloy was used through electrical discharge coating (EDC); an adaptation of electrical discharge machining. The potential of EDC in which can facilitates the production of hard coatings may exploit the phenomena for the attachment of desirable materials onto the surface of materials. Therefore, the aim of this paper is to present a robust method (two levels of full factorial design and ANOVA) to determine the desired parameters and significant factors based on the surface roughness of the machined surface. Manipulation of parameters set up such as gap voltage, discharge duration and pulse interval and the current were employed and a reverse polarity was selected for this experiment. The results demonstrated that the most significant factors influence the surface coating performances are the discharge duration, current, gap voltage as well as the interaction between gap voltage and discharge duration.

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