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All Journal El-HARAKAH : Jurnal Budaya Islam Prosiding SNATIF YUDISIA : Jurnal Pemikiran Hukum dan Hukum Islam Jurnal Ilmiah Peuradeun CIRCUIT: Jurnal Ilmiah Pendidikan Teknik Elektro JURNAL SERAMBI ILMU SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Mesin JISIP: Jurnal Ilmu Sosial dan Pendidikan Jurnal Dedikasi Pendidikan Jurnal Sains dan Teknologi Reaksi Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi El-Usrah: Jurnal Hukum Keluarga Jurnal Pengabdian Masyarakat Bumi Raflesia Jurnal Vokasi International Journal of Demos Jurnal Syntax Imperatif : Jurnal Ilmu Sosial dan Pendidikan Jurnal Pengabdian kepada Masyarakat Nusantara Jurnal Teknik Informatika (JUTIF) SAMAWA : Jurnal Hukum Keluarga Islam LEARNING : Jurnal Inovasi Penelitian Pendidikan dan Pembelajaran GOVERNANCE: Jurnal Ilmiah Kajian Politik Lokal dan Pembangunan Journal of Experimental and Clinical Pharmacy (JECP) JCDD Jurnal Administrasi Pemerintahan Desa Islamic Circle SWARNA Kalosara: Family Law Review KENDALI: Economics and Social Humanities Jurnal Litek : Jurnal Listrik Telekomunikasi Elektronika Depik Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan Jurnal Ilmu Administrasi Negara Development : Studies in Educational Management and Leadership Journal Of Humanity Dedication Depik Jurnal Ilmu-Ilmu Perairan, Pesisir, dan Perikanan Jurnal Polimesin
Akhyar Akhyar
Universitas Islam Negeri Sultan Syarif Kasim Riau
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Journal : Jurnal Polimesin

 1 
Effect of welding repair on mechanical properties of ASTM A36 carbon steel weld joints Azwinur, Azwinur; Syukran, Syukran; Akhyar, Akhyar; Tho, Nguyen Huu; Jaswir, Jaswir
Jurnal Polimesin Vol 20, No 2 (2022): August
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v20i2.3075

Abstract

The welding repair process greatly affects the procedure of a welding process to be able to obtain the results of a connection that is safe and in accordance with its provisions. The strength of the welded joint must be considered and ensured that its strength is at least close to the original strength of the material used. In a welding process, errors or omissions are often made accidentally by the welder or the work environment and the selection of welding variable parameters is not appropriate so that welding defects occur. Welding defects can affect the strength of the weld joint. The purpose of this study was to determine the effect of welding repair on the mechanical properties of ASTM A36 material. The material used in conducting this research and testing is ASTM A36 steel plate. Welding was carried out on 4 specimens with the method without repair, repair 1x, repair 2x and repair 3x. Based on the test results, the number of repairs greatly affects the strength of the material connection. The highest maximum tensile strength value in 1 repair specimen is 501.90 Mpa and the lowest is in unwelded material or base metal of 467.97 Mpa. The results of the highest hardness test on the repair material 1 time of 30.83 HRC in the weld metal area and the lowest hardness value on the repair specimen 3 times in the HAZ area of 21 HRC. The results of the macro photo test on each specimen did not detect any welding defects on the inside of the welded material. the largest HAZ width in the 3 times repair material is 21.5 mm and the smallest HAZ width in the specimen without repair is 18 mm
Effect of rotation on achieving constant voltage in three-phase self-excited induction generator for small scale wind turbines application Syukri, Mahdi; Syuhada, Ahmad; Tarmizi, Tarmizi; Akhyar, Akhyar
Jurnal Polimesin Vol 22, No 3 (2024): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i3.5279

Abstract

Three-phase Self-Excited Induction Generators (SEIGs) are commonly employed for electricity generation in remote or isolated areas. SEIGs are preferred in such regions due to their ability to create a magnetic field by adding a capacitor to one of their terminals. Nevertheless, a significant challenge in utilizing SEIGs is maintaining a consistent output voltage in the presence of load fluctuations. This study aims to investigate the impact of generator rotation on the SEIG's output voltage and determine the optimal rotation speed required for achieving a stable output voltage. Ensuring stable voltage regulation is crucial to guarantee the proper functioning of all loads connected to the SEIG. Furthermore, operating the SEIG in parallel with other generators is advantageous. The methodology employed in this study involves varying the load supplied by the SEIG at different capacitor values. Unwanted voltage variations occur due to load fluctuations within a generating system or SEIG. Adjustments to the generator's rotation speed are made to uphold a uniform voltage level. The variables considered in this study include the generator's rotation speed, capacitor size, and load fluctuations. Simulation results demonstrate that the SEIG's output voltage is affected by the generator's rotation speed, and maintaining a consistent voltage necessitates appropriate adjustments to capacitor values and generator speed. This research enhances understanding of SEIG characteristics and offers guidance on effective settings for maintaining a stable output voltage at various generator rotation speeds. Future research can focus on practically implementing these findings to enhance the performance of SEIGs in real-world applications
Investigating the Effects of Solution Treatment Parameters and Artificial Aging on Hardness Improvement of Precipitation-Hardened 6061 Aluminum Alloy Yunus, Azwar; Akhyar, Akhyar; Hasanuddin, Iskandar; Sasmito, Agus
Jurnal Polimesin Vol 23, No 4 (2025): August
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i4.7076

Abstract

This study investigates the impact of solution treatment parameters such as temperature, holding time, and quenching media on the hardness enhancement of wrought aluminum alloy 6061-T6 through precipitation hardening. The objectives of this research are to analyze the influence of solution treatment parameters on hardness enhancement, explore the correlation between the solutioning step and the artificial aging process, and optimize the heat treatment process for improved hardness values. Specimens of 6061-T6 aluminum alloy initially exhibited a hardness of 102 HV. After heating to 500°C with holding times of 45, 60, and 75 minutes, followed by quenching in water and SAE 40 oil, Vickers hardness testing revealed significant changes: hardness dropped to 52 HV after solution treatment, then increased to 63 HV (21.15% increase) for 60 minutes and 64 HV (23.08% increase) for 75 minutes. After artificial aging at 210°C for 120, 180, and 240 minutes, the maximum hardness recorded was 113 HV, marking a 10.78% increase from the initial hardness. The quenching medium also influenced hardness; specimens quenched in SAE 40 oil showed improved hardness compared to those quenched in water, likely due to slower cooling rates that allow for better precipitate formation. The increase in hardness is closely linked to microstructural changes during heat treatment. Solution treatment promotes the dissolution of alloying elements, leading to the formation of fine precipitates during aging. These precipitates impede dislocation movement, enhancing the alloy's strength through precipitation hardening. Thus, the density and distribution of these precipitates significantly contribute to the overall hardness enhancement observed in the 6061-T6 aluminum alloy
Co-Authors . Roslidar Abda Abda Abrar, Syahidul Agus Salim Agus Sasmito, Agus Ahmad Alwi Alfarizi Ahmad Syuhada Ahmad, Rivai Ahmad, Syarif Akhyar, Miftahul Alfikri Siregar, Tio Nanda Amiruddin Amiruddin Andri muda Nst Asrul Hamid Aulia, Niza Azwinur Azwinur Bakhtiar Bakhtiar Bimo Sunarfri Hantono Daska Azis Djamani, Rianjuanda Fathurrahman Fathurrahman Fazri Amir Firdaus Firdaus Gunawan Gunawan Haeril, Haeril Hamid, Asrul Harahap, Titi Martini Hasanah Hasanah Hasannuddin, Teuku Hasanuddin, Iskandar hsb, zuhdi Idris Idris Ilham Ilham Ilham Ramadan Ilham Ramadan Siregar, Ilham Ramadan Ilham Zulfahmi Jaswir, Jaswir Joenoes, Ahmad Taufik Jufriadi Jufriadi, Jufriadi Kridawati Sadhana Lubis, Riskiyah Nur M Fahrur razi Magfirah, Rima Mahdi Syukri Malahayati Malahayati Marlinda, Leni Misriana Misriana, Misriana Muda, Andri Muhammad Amin Muhammad Ilham Muhammad Muhammad Muhammad Rizal Fachri Muhammad Sauki Muhjam Kamza Musriandi, Riki Nahari, Lailan Nasution, Khairunnisa Nasution, Suryadi Njotowidjojo, Dyah Muliawati Nst, Nur Aliyah Nur Aminah Nur Masyitah, Nur Nur ‘Azah NURLIANA NURLIANA Nurul Umami R. Rusli Rababah, Mahmoud Ali Rahmad Hidayat Rais, Amien Refnas Raja Ritonga Razali Thaib Risanuri Hidayat RITONGA, SYAIPUDDIN Rizki, Ayana Rizqi, Rahmat Robert Tungadi Roudotul Jannah Ruswandi, Edy Saddami, Khairun Saifuddin Saifuddin Salahuddin Salahuddin Sinaga, Ulva Rasida Siregar, Resi Atna Sari Soraya Hasyim Hasibuan Sri Wahyuni Hasibuan Suaeb, Suaeb Suprijanto, Syoni Suryadi Suryadi Suryani Suryani Syarif Syarif Syukran Syukran Tamarli, Tamarli Tambunan, Jannus Tarmizi Tarmizi Thaib Rizwan, Thaib Tho, Nguyen Huu Tita Nurmalinasari Hidayat Turkiani, Eka Usman Usman Wazir, Khairil Widdha Mellyssa Widodo, Syamsul Bahri Winarty, Asih Yunus, Azwar Zaki, Ammar Zamzami Zuhdi Hasibuan Zuhrah Zulfikar, Teuku Muhammad