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375 results on '"Muhamad, Norhamidi"'

1. Surface Topography and Density of Ti6Al4V via LPBF After Heat Treatment

Author

Jamhari, Fathin Iliana, Foudzi, Farhana Mohd, Buhairi, Minhalina Ahmad, Sulong, Abu Bakar, Radzuan, Nabilah Afiqah Mohd, Muhamad, Norhamidi, Mohamed, Intan Fadhlina, Tan, Kim Seah, Chaari, Fakher, Series Editor, Gherardini, Francesco, Series Editor, Ivanov, Vitalii, Series Editor, Haddar, Mohamed, Series Editor, Cavas-Martínez, Francisco, Editorial Board Member, di Mare, Francesca, Editorial Board Member, Kwon, Young W., Editorial Board Member, Tolio, Tullio A. M., Editorial Board Member, Trojanowska, Justyna, Editorial Board Member, Schmitt, Robert, Editorial Board Member, Xu, Jinyang, Editorial Board Member, Salim, Mohd Azli, editor, Khashi’ie, Najiyah Safwa, editor, Chew, Kit Wayne, editor, and Photong, Chonlatee, editor

Published
2024
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2. Effect of Heat Treatment on Hardness and Microstructure of Titanium Alloy (Ti6Al4V) via Laser Powder Bed Fusion (LPBF)

Author

Mohd Foudzi, Farhana, Sulong, Abu Bakar, Muhamad, Norhamidi, Mohd Radzuan, Nabilah Afiqah, Mohamed, Intan Fadhlina, Jamhari, Fathin Iliana, Ahmad Buhairi, Minhalina, Lin, Ngoi Hui, Hung, Lai Yu, Chia, Chun Chuan, Tan, Kim Seah, Ghosh, Arindam, Series Editor, Chua, Daniel, Series Editor, de Souza, Flavio Leandro, Series Editor, Aktas, Oral Cenk, Series Editor, Han, Yafang, Series Editor, Gong, Jianghong, Series Editor, Jawaid, Mohammad, Series Editor, Abd. Aziz, Radhiyah, editor, Ismail, Zulhelmi, editor, Iqbal, A. K. M. Asif, editor, and Ahmed, Irfan, editor

Published
2024
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9. Fabrication of Titanium-Matrix Composite with 40 wt% Hydroxyapatite by Powder Injection Molding

Author

Haswendra, Aditya Reza, Arifin, Amir, Sulong, Abu Bakar, Muhamad, Norhamidi, Gunawan, Barlin, Cavas-Martínez, Francisco, Series Editor, Chaari, Fakher, Series Editor, di Mare, Francesca, Series Editor, Gherardini, Francesco, Series Editor, Haddar, Mohamed, Series Editor, Ivanov, Vitalii, Series Editor, Kwon, Young W., Series Editor, Trojanowska, Justyna, Series Editor, Hassan, Mohd Hasnun Arif, editor, Ahmad (a) Manap, Zulkifli, editor, Baharom, Mohamad Zairi, editor, Johari, Nasrul Hadi, editor, Jamaludin, Ummu Kulthum, editor, Jalil, Muhammad Hilmi, editor, Mat Sahat, Idris, editor, and Omar, Mohd Nadzeri, editor

Published
2022
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10. Effect of fiber orientation and elevated temperature on the mechanical properties of unidirectional continuous kenaf reinforced PLA composites

Author

Tharazi Izdihar, Abdul Azam Farah Atiqah, Muhamad Norhamidi, Hui David, Sulong Abu Bakar, and Gaff Milan

Subjects
natural fiber, fiber orientation, polymer composites, continuous fiber, mechanical properties, Technology, Chemical technology, TP1-1185
Abstract

Limitation in practical applications of biopolymer–fiber composite is mainly at higher temperatures. Thus, this study highlights the effects of fiber orientation on the durability of polylactic acid (PLA) reinforced with unidirectional (UD) continuous kenaf fibers at elevated temperatures. PLA and long kenaf fiber were fabricated using the hot-pressing method and stacked at fiber orientations of 0°, 45°, or 90°, relative to the tensile force. Dynamic mechanical analysis of the composites shows excellent anti-shock and temperature-resistant properties of the composite. UD PLA–kenaf composites with a 0° fiber orientation showed an ultimate tensile of ∼190 MPa and a flexural strength of ∼235 MPa, and the strength of the composite was able to retain up to 120°C temperature. The debonding behavior of the fiber from the matrix (fiber pull-out) supported by microscopy proved that interfacial failure occurs from the local strains, which initiate cracking. Interfacial failure and stress transfer have caused a remarkable reduction in composite strength when fibers were oriented at 90°. Hence, this current improvement in the performance of the UD PLA–kenaf fiber composite may potentially replace conventional synthetic fibers, especially for structural automotive applications.

Published
2023
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18. The Score Difference of Emotional Intelligence among Engineering Students at Different Levels of Academic Year

Author

Saibani, Nizaroyani, Sabtu, Idham, Muhamad, Norhamidi, Wahab, Dzuraidah Abd, and Sahari, Ja'afar

Abstract

The number of students from the under-graduate level who have successfully completed their studies is on the increase every year. In the selection process for the best employee-candidate, employers have to take into consideration several factors other than academic excellence, including values that depict EQ or emotional intelligence. This study focuses on looking at the EQ achievement among the under-graduate students at the Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia. The EQ scores were measured using the MEQI Test (Malaysian EQ Inventory). The study began by monitoring EQ achievements of a group of students at three consecutive years: Year 1, Year 2 and Year 3 in the faculty. The study is expanded by measuring the EQ of all faculty students at the stage of Year 1, Year 2, Year 3, Year 4, also right after they had completed their studies of four years. Results have shown that, from the three-year data from 2010 to 2012, the overall EQ scores have recorded a marked increase.

Published
2013

29. Rheological Analysis of Zirconia-Hydroxyapatite with Bi-Modal System of Binders; Low-Density Polyethylene and Palm Stearin

Author

Amin, Muhammad Mohamed, Zainal Adelin, Nur Syamimi, Sulong, Abu Bakar, Muhamad, Norhamidi, Amin, Muhammad Mohamed, Zainal Adelin, Nur Syamimi, Sulong, Abu Bakar, and Muhamad, Norhamidi

Abstract

The two component micro-powder injection molding (2C-?PIM) process has evolved from ?PIM process because of the increasing demand for multi-functional micro-components applications. In this research work, the selected materials to fabricate micro-sized bi-material parts are zirconia (ZrO2) and hydroxyapatite (HA). ZrO2 is chosen for structural integrity and bio-inert, while HA is mainly chosen for bio-active properties. The reason of employing the multi-component binders is to ensure the flowability of the feedstock. Feedstock rheological characteristics needs to be carefully investigated to avoid any undesirable and inhomogeneous mixture between powder and binder. A common binder system which is comprised of palm stearin and low-density polyethylene (LDPE) were mixed with individual ZrO2 and HA powder particles to prepare for ZrO2 and HA feedstocks. Typically, the feedstocks were obtained ZrO2 and HA powders independently with a binder ratio of 60 wt.% of palm stearin and 40wt.% low-density polyethylene (LDPE). The mixing was carried out in Brabender mixer. Before mixing, critical powder volume percentage (CPVP) analysis was carried out to determine the optimal powder loadings required to prepare the ZrO2 and HA feedstocks. In this research work, the obtained CPVP of ZrO2 and HA powders were 47.0 and 59.0 vol.%, respectively. Based on CPVP analysis, six feedstocks with optimal powder loadings of 43, 44 and 45 vol.% for ZrO2 and 54, 55 and 56 vol.% for HA were prepared. The rheological analysis involving viscosity, shear rate, flow behavior index, activation energy and moldability index was investigated using capillary rheometer. Based on the obtained rheology result, it shows that the overall shear rate and viscosity are within the 2C-?PIM process recommended range. All tested composition shows pseudoplastic behavior. The results of the study found that ZrO2 and HA with optimal powder loadings of 55 vol.% and 44 vol.% have good rheological properties compared to fe

Published
2023

39. Review on volumetric energy density: influence on morphology and mechanical properties of Ti6Al4V manufactured via laser powder bed fusion

Author

Buhairi, Minhalina Ahmad, primary, Foudzi, Farhana Mohd, additional, Jamhari, Fathin Iliana, additional, Sulong, Abu Bakar, additional, Radzuan, Nabilah Afiqah Mohd, additional, Muhamad, Norhamidi, additional, Mohamed, Intan Fadhlina, additional, Azman, Abdul Hadi, additional, Harun, Wan Sharuzi Wan, additional, and Al-Furjan, M S H, additional

Published
2022
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