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Parametric Selection and Optimization of Al-Mg-Mn-Zr-Er Alloy Weld Bead Geometry Welded by Laser Using the Aspect Ratio-Based Taguchi Method Umoh, Akwaeno Uduak; Oke, Sunday Ayoola; Rajan, John; Oluwo, Adeyinka; Oyekeye, Manasseh Olusegun; Jose, Swaminathan; Aderibigbe, Samuel Bolaji; Odudare, Samson Oluwaseun
IJIEM - Indonesian Journal of Industrial Engineering and Management Vol 5, No 2: June 2024
Publisher : Program Pascasarjana Magister Teknik Industri Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijiem.v5i2.22749

At present, there is a continuous escalation of labour costs, material costs and other welding-related costs and stabilizing them is challenging. Therefore, optimization of the welding process is essential to stabilize the situation. In this article, an aspect ratio-based Taguchi method is proposed to control the operational performance of the laser welding process while welding the Al-Mg-Mn-Zr-Er alloy sheets. The direct parameters considered are the laser power (LP), welding speed (WS) and welding feed rate (WFR). The aspect ratios analyzed are LP/WS, LP/WFR, WS/LP, WS/WFR, WFR/LP and WFR/WS. The aspect ratios are introduced into the factor/level framework, and the results, transmitted as orthogonal arrays are changed to signal-to-noise ratios. The final results are the delta values, ranks and optimal parametric settings. The principal results indicate that for the LPWS and LP/WFR formulation, the optimal parametric setting is LP/WS1LP/WFR3, which is interpreted as 1.6 kWmin/m LP/WS and 0.35 kWmin/m of LP/WFR. The corresponding delta values are 3.875 and 2.6288 while the positions of 1st and 2nd were obtained by LP/WS and LP/WFR aspect ratios, respectively. It was established that the LP/WS, WS/WFR and WFR/LP are the most important aspect ratios for the laser welding of Al-Mg-Mn-Zr-Er alloy sheets. Therefore, prioritization in resource distribution should be given to these parameters according to their positions. This article serves as a source of information for welding decision-making.

INFLUENCE OF CO-FIRING PKS (PALM KERNEL SHELL) WITH COAL ON BOILER EFFICIENCY COMBUSTOR TYPE : RECIPROCATING SERVO GRATE Emorinken, Samuel Olayinka; Ogunmola, Bayo Yemisi; Alozie, Nehemiah Sabinus; Oluwo, Adeyinka; Rajan, John; Jose, Swaminathan; Oke, Sunday Ayoola
International Journal of Mechanical Engineering Technologies and Applications Vol. 6 No. 1 (2025)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2025.006.01.15

The astronomical increase in the cost of inputs for the coating process without a corresponding increase in market share and prices of goods is a threat to surface coating manufacturers. Despite this threat, very few discussions focus on the efficiency of the coating process. The purpose of this paper is to analyse the efficiency of the coating process while using the 67Ni18Cr5Si4B coating powder on C45 steel substrate material. The data envelopment analysis was used to obtain the relative efficiency of parameters, namely, spray velocity, powder feed rate, spray distance, porosity, adhesion strength, and microhardness. This in turn contributed to analyzing the efficiencies of the levels of the inputs to provide efficiency information on the output from the averages. Data envelopment analysis regards inputs and outputs as decision-making units (DMUs) and is operated by minimizing inputs or maximizing the outputs. Using data envelopment analysis to obtain the relative efficiency of coating powder becomes an enlightening practice. With this, the levels of each system were termed to be efficient, if the efficiency factor (hk) is equal to one. In a real sense, the levels could be obtained by calculating the average values regarding a parameter. The result of the study was enhanced with the aid of the linprog facility in Matlab. The efficiency was obtained for each level as 0.92,1, and 1 respectively. Hence, levels 2 and 3 are efficient but level 1 is inefficient according to the data envelopment analysis. On average, the overall efficiency is 0.95 which is termed inefficient.

Evaluation of Ecological Minimum Quantity Lubrication Turning of AISI 4340 Alloy for Parametric Choices Using the Distance from Average Solution (EDAS) Method Ozule, Chukwuka Prosper; Oke, Sunday Ayoola; Rajan, John; Oluwo, Adeyinka; Oyekeye, Manasseh Olusegun
IJIEM - Indonesian Journal of Industrial Engineering and Management Vol 5, No 3: October 2024
Publisher : Program Pascasarjana Magister Teknik Industri Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijiem.v5i3.22752

Flood-cutting fluids and minimum quantity lubrication (MQL) schemes are associated with high cutting fluid costs and health effects, which should be regulated through the selection and optimization of parameters. This paper applies the distance from average solution (EDAS) method to assess the criteria value regarding three alternatives (cutting depth, cutting speed and feed) using CuO nano lubricants discharged in minimum quantity lubrication. Three responses, including beneficial (cutting speed, feed and cutting depth) and non-beneficial (cutting force) responses were used. A novel weight determination scheme based on the beneficial and non-beneficial criteria was established for the first time as inputs to the EDAS method. The weights established 0.1504, 0.2832, 0.2832 and 0.2832 for cutting force, cutting speed, feed and cutting depth, respectively. The results show a multi-modal best performance of 0.8438, which occurs in multiple experimental trials of 2, 4, 5, and 8. The optimization implemented in this study uses all inputs and the CuO nano lubricant was considered in each case using a spreadsheet for the evaluation. Case study data illustrating the uniqueness of the method using the literature data shows that EDAS is robust enough to be applied in machining activities.

DEPOSITION COATING EFFICIENCY OF 67Ni18Cr5Si4B COATING POWDER ON C45 STEEL BASE MATERIAL USING DATA ENVELOPMENT ANALYSIS Emorinken, Samuel Olayinka; Ogunmola, Bayo Yemisi; Alozie, Nehemiah Sabinus; Oluwo, Adeyinka; Rajan, John; Jose, Swaminathan; Oke, Sunday Ayoola
International Journal of Mechanical Engineering Technologies and Applications Vol. 6 No. 1 (2025)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2025.006.01.15

The astronomical increase in the cost of inputs for the coating process without a corresponding increase in market share and prices of goods is a threat to surface coating manufacturers. Despite this threat, very few discussions focus on the efficiency of the coating process. The purpose of this paper is to analyse the efficiency of the coating process while using the 67Ni18Cr5Si4B coating powder on C45 steel substrate material. The data envelopment analysis was used to obtain the relative efficiency of parameters, namely, spray velocity, powder feed rate, spray distance, porosity, adhesion strength, and microhardness. This in turn contributed to analyzing the efficiencies of the levels of the inputs to provide efficiency information on the output from the averages. Data envelopment analysis regards inputs and outputs as decision-making units (DMUs) and is operated by minimizing inputs or maximizing the outputs. Using data envelopment analysis to obtain the relative efficiency of coating powder becomes an enlightening practice. With this, the levels of each system were termed to be efficient, if the efficiency factor (hk) is equal to one. In a real sense, the levels could be obtained by calculating the average values regarding a parameter. The result of the study was enhanced with the aid of the linprog facility in Matlab. The efficiency was obtained for each level as 0.92,1, and 1 respectively. Hence, levels 2 and 3 are efficient but level 1 is inefficient according to the data envelopment analysis. On average, the overall efficiency is 0.95 which is termed inefficient.

APPLICATION of ENTROPY MULTICRITERIA METHOD FOR PARAMETRIC CLASSIFICATION of THE WIRE ELECTRICAL DISCHARGE MACHINING PROCESS USING NITINOL-60 SHAPE MEMORY ALLOY Ogunmola, Bayo Yemisi; Onitiri, Modupe Adeoye; Alozie, Nehemiah Sabinus; Oluwo, Adeyinka; Okwo, Jeremiah Ugo; Rajan, John; Jose, Swaminathan; Oke, Sunday Ayoola; Aderibigbe, Samuel Bolaji
International Journal of Mechanical Engineering Technologies and Applications Vol. 6 No. 2 (2025)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2025.006.02.10

Nitinol-60 shape memory alloy (SMA) is known for its outstanding super elasticity non-magnetic properties, vibration absorption, high hardness and long fatigue life, among others. However, its conventional processing is difficult, complex and time-consuming, making the wire electrical discharge machining (WEDM) a viable option. Additionally, the choice of multicriteria methods is growing drastically in machining for economic and planning advantages. This paper presents an L15 orthogonal array analysis of the WEDM process parameters for nitinol-60 using the entropy method. The principal parameters are the gap voltage, dielectric flow rate and duty factor. However, the responses are surface crack density, recasting of larger thickness, and cutting rate. The procedure starts with the design of an experimental matrix with fifteen experiments. Then the parameters and responses are as beneficial and non-beneficial while their normalization is made. The entropy method is applied and the results are reported for the first time in the WEDM process of nitinol-60. to ensure optimum performance of the WEDM process, priority should be given in descending order to duty factor, dielectric flow rate and gap voltage at 0.1398, 0.1325 and 0.1117, respectively. to prioritize the responses, the average peak-to-valley height, maximum peak-to-valley heights and the cutting rate obtained the first, second and third positions, respectively. The findings presented in this work highlight the importance of nitinol-60 SMA as a promising candidate for medical devices and aerospace components. These are of public interest including neurovascular, dentistry, orthopedic, endoscopy and vascular intervention. It therefore offers new insights into planning in healthcare and wellbeing.

Aspect Ratio-based Taguchi Method with An Application to the Friction Stir Welding of AA6062-T6 Alloy Francis, Osita Prince; Ogunmola, Bayo Yemisi; Alozie, Nehemiah Sabinus; Oluwo, Adeyinka; Rajan, John; Jose, Swaminathan; Oke, Sunday Ayoola; Ibitoye, Ayomide Sunday
International Journal of Industrial Engineering and Engineering Management Vol. 7 No. 1 (2025)
Publisher : Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24002/ijieem.v7i1.7885

This research proposes a new method of modified Taguchi method based on aspect ratios of the parameters integrated with the present worth method for the determination of optimal parametric setting during the friction stir welding process. As a cornerstone feature in the optimization procedure, aspect ratios are uniquely formulated where single parameters are replaced with products of parameters, squares of a particular parameter multiplied by a parameter, and only squares of each parameter information that represent inputs for the determination of the orthogonal matrix, heading to the optimal parametric setting computations, ranks, and delta determination. A wide range of 83 formulations was considered. Unlike previous research, this article accounts for multiple combinations of aspect ratios greater than the members of parameters present in the factor-level framework in the traditional setting of the Taguchi scheme. A principal result reveals that when the parameters were interchanged from A, B, and C to ABC, A2C, A2 B, A2, B2, and C2, indicating tool till angle, tool rotational speed, and welding speed for A, B and C, respectively, the optimal parametric setting was 462000 (0.rpm.mm/min), 990 (0.mm/min), 12600 (0.rpm.90), 1960000rpm, 12100mm/min2. The result assists welding engineers in implementing optimal decisions during friction stir welding activities. The findings of this study stimulate welding engineers to establish sources of poor-quality welds and optimize the outputs while reducing welding costs.

Aspect Ratio-based Taguchi Method with An Application to the Friction Stir Welding of AA6062-T6 Alloy Francis, Osita Prince; Ogunmola, Bayo Yemisi; Alozie, Nehemiah Sabinus; Oluwo, Adeyinka; Rajan, John; Jose, Swaminathan; Oke, Sunday Ayoola; Ibitoye, Ayomide Sunday
International Journal of Industrial Engineering and Engineering Management Vol. 7 No. 1 (2025)
Publisher : Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24002/ijieem.v7i1.7885

This research proposes a new method of modified Taguchi method based on aspect ratios of the parameters integrated with the present worth method for the determination of optimal parametric setting during the friction stir welding process. As a cornerstone feature in the optimization procedure, aspect ratios are uniquely formulated where single parameters are replaced with products of parameters, squares of a particular parameter multiplied by a parameter, and only squares of each parameter information that represent inputs for the determination of the orthogonal matrix, heading to the optimal parametric setting computations, ranks, and delta determination. A wide range of 83 formulations was considered. Unlike previous research, this article accounts for multiple combinations of aspect ratios greater than the members of parameters present in the factor-level framework in the traditional setting of the Taguchi scheme. A principal result reveals that when the parameters were interchanged from A, B, and C to ABC, A2C, A2 B, A2, B2, and C2, indicating tool till angle, tool rotational speed, and welding speed for A, B and C, respectively, the optimal parametric setting was 462000 (0.rpm.mm/min), 990 (0.mm/min), 12600 (0.rpm.90), 1960000rpm, 12100mm/min2. The result assists welding engineers in implementing optimal decisions during friction stir welding activities. The findings of this study stimulate welding engineers to establish sources of poor-quality welds and optimize the outputs while reducing welding costs.

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