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All Journal Rekayasa Mesin Dinasti International Journal of Education Management and Social Science
Sabarati, Absaralita
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Education Mechanical Engineering

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KARAKTERISTIK MEKANIK DAN BALISTIK KOMPOSIT Al-8Zn-4Mg-20 VOL.% SiC HASIL PROSES SQUEEZE CASTING DAN PERLAKUAN PENUAAN Sabarati, Absaralita; Adhipura, Panji; Sofyan, Bondan T.
Jurnal Rekayasa Mesin Vol. 15 No. 1 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i1.1819

Abstract

Armoured Personnel Carrier (APC) as a means to support the mobility of TNI must have high toughness so that they are not easily penetrated by bullets. The APCs are commonly made of steel due to their excellent toughness and ballistic properties, however, it has a high density that reduces their mobility. Therefore, an alternative material is needed, which is lighter but remains tough. One option is Metal Matric Composites (MMC). This research studied a composite with Al-8Zn-4Mg alloy as the matrix and 20 vol. % SiC as the reinforcement. The composite was melted in a muffle furnace, stirred at 500 rpm, and squeeze-cast at the pressure of 20 tons. The samples were then solution-treated at 500°C for 1 h and aged at 200°C for up to 100 h. Characterization included hardness and impact testing, optical microscopy, and Scanning Electron Microscope - Energy Dispersive X-ray (SEM-EDX). The samples were then thermal coated by the High-Velocity Oxygen Fuel (HVOF) method using WC-Co particles. The coated samples underwent ballistic testing in accordance with NIJ 0108.01 standard by using a type III 7.56 mm caliber projectile. The results show that the hardness and impact energy increased with aging due to the formation of Mg2Si and Mg3Zn3Al2 precipitates. Peak hardness conditions after aging for 2 h generated hardness of 90,25 HRB and impact energy of 3 Joules. The composite plate failed and was penetrated by a type III 7.56 mm caliber projectile.
Enhancing the Competitiveness of PT. Len Industri (Persero) through Human Resource Readiness to Support the Development of Defense and Security Equipment Mobility in the Era of Industry 4.0 Risnawan, Novan; Agson Gani, Erzi; Dindin, Imanuel; Ansori, Ansori; Amperiawan, Gita; Sumaryadi, Sumaryadi; Suciati, Suciati; Sabarati, Absaralita; Suyitno, Mohtar
Dinasti International Journal of Education Management And Social Science Vol. 5 No. 6 (2024): Dinasti International Journal of Education Management and Social Science (Augus
Publisher : Dinasti Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38035/dijemss.v5i6.2903

Abstract

This research aims to analyze the improvement of PT. LEN Industri's (Persero) competitiveness through the readiness of human resources to support the development of defence and security equipment locomotion in the fourth industrial revolution era. The method used in this research is data collection through questionnaire distribution and literature study. The respondents in this research are PT employees. LEN Industri (Persero) who are involved in the development of defence and security equipment locomotion. The analysis results show that most respondents are ready to face the fourth industrial revolution, but there are still obstacles to using digital platforms—improving PT. LEN Industri's (Persero) competitiveness can be achieved by enhancing the readiness of human resources to adopt new technologies such as the Internet of Things (IoT), Big Data, Cloud Computing, Artificial Intelligence (AI), and Digital Twin. In conclusion, this research recommends PT. LEN Industri (Persero) to further enhance and manage its human resources to be better prepared to increase competitiveness in the fourth industrial revolution era.
KARAKTERISTIK MEKANIK DAN BALISTIK KOMPOSIT Al-8Zn-4Mg-20 VOL.% SiC HASIL PROSES SQUEEZE CASTING DAN PERLAKUAN PENUAAN Sabarati, Absaralita; Adhipura, Panji; Sofyan, Bondan T.
Jurnal Rekayasa Mesin Vol. 15 No. 1 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i1.1819

Abstract

Armoured Personnel Carrier (APC) as a means to support the mobility of TNI must have high toughness so that they are not easily penetrated by bullets. The APCs are commonly made of steel due to their excellent toughness and ballistic properties, however, it has a high density that reduces their mobility. Therefore, an alternative material is needed, which is lighter but remains tough. One option is Metal Matric Composites (MMC). This research studied a composite with Al-8Zn-4Mg alloy as the matrix and 20 vol. % SiC as the reinforcement. The composite was melted in a muffle furnace, stirred at 500 rpm, and squeeze-cast at the pressure of 20 tons. The samples were then solution-treated at 500°C for 1 h and aged at 200°C for up to 100 h. Characterization included hardness and impact testing, optical microscopy, and Scanning Electron Microscope - Energy Dispersive X-ray (SEM-EDX). The samples were then thermal coated by the High-Velocity Oxygen Fuel (HVOF) method using WC-Co particles. The coated samples underwent ballistic testing in accordance with NIJ 0108.01 standard by using a type III 7.56 mm caliber projectile. The results show that the hardness and impact energy increased with aging due to the formation of Mg2Si and Mg3Zn3Al2 precipitates. Peak hardness conditions after aging for 2 h generated hardness of 90,25 HRB and impact energy of 3 Joules. The composite plate failed and was penetrated by a type III 7.56 mm caliber projectile.
Co-Authors Adhipura, Panji Agson Gani, Erzi Amperiawan, Gita ansori ansori Aritonang, Sovian Bondan T. Sofyan Dindin, Imanuel Risnawan, Novan Suciati Suciati Sumaryadi Sumaryadi, Sumaryadi Suyitno, Mohtar Zaini, Ansori