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Prijo Harsono
Politeknik Maritim Negeri Indonesia
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Analisis Proses FSW dan PWHT Material Aluminium Terhadap Kekuatan Tarik, Kekerasan dan Mikrostruktur Wahyu Ari Putranto; Khaeroman Khaeroman; Heri Kiswanto; Ngatmin Ngatmin; Prijo Harsono; Purwanto Purwanto
Infotekmesin Vol 17 No 2 (2026): Infotekmesin: Juli 2026
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/

Abstract

Friction Stir Welding (FSW) is a welding method that does not use filler materials. FSW has been widely used in the maritime industry. The purpose of this study is to analyze the effect of FSW joints before and after Post Weld Heat Treatment (PWHT) on 5052 and 6061 aluminum alloy materials. The FSW parameters include a spindle speed of 1500 rpm (clockwise), a travel speed of 30 mm/min, a tool depth of 0.2 mm, and a tool tilt angle of 1°. The PWHT parameters involve heating the FSW material to 550°C, with holding times of 45 and 90 minutes, followed by water quenching. The subsequent process is artificial aging up to a temperature of 200°C for 6 hours. The materials were then subjected to tensile testing, hardness testing, and micrographic examination. The results showed that the highest values were achieved using FSW parameters with 90 minutes of PWHT, yielding the maximum tensile strength and hardness values of 264 MPa (27.5%) and 89.6 HV (37.4%). Furthermore, the smallest and most uniform grain size was quantitatively observed at 4.9 µm in both the weld zone and the base metal.
Meningkatkan Peran Aktif Karang Taruna dalam Meningkatkan Kesejahteraan Sosial untuk Menyongsong Indonesia Emas Tahun 2045 Susanto Susanto; Gunawan Budi Santoso; Ngatmin Ngatmin; Juwarlan Juwarlan; Prijo Harsono; Amthori Anwar
Karunia: Jurnal Hasil Pengabdian Masyarakat Indonesia Vol. 5 No. 1 (2026): Maret : Karunia: Jurnal Hasil Pengabdian Masyarakat Indonesia
Publisher : Fakultas Teknik Universitas Maritim AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58192/karunia.v5i1.4160

Abstract

Abstract and The Community Service Program (PKM) implemented by lecturers from the Indonesian State Maritime Polytechnic in partnership with the Karang Taruna Youth Association of RW 03, Genuk Village, Semarang Regency, aims to strengthen the capacity of youth organizations to improve social welfare. As a forum for the younger generation, Karang Taruna often faces issues related to governance, low social participation, and limited productive skills. The PKM implementation method employs a problem-based approach through the stages of survey, situation analysis, solution formulation, training, and evaluation. Key activities include training in organizational governance, character building through moral values, Sinoman, and Pranoto Coro, as well as vocational skills in electric welding. The results of the activities showed significant improvements across various aspects: organizational governance increased from 30% to 85%, social awareness of mutual cooperation rose from 40% to 90%, pranoto coro skills reached 70%, electrical welding skills reached 75%, active member participation rose from 25% to 80%, and initiatives for productive activities increased from 5% to 65%. These findings confirm that the PKM program serves not only as a knowledge transfer initiative but also as a catalyst for social and economic change. The provision of technical skills opens opportunities for productive enterprises, while the reinforcement of cultural values strengthens social solidarity. Thus, this PKM program contributes to strengthening the strategic role of Karang Taruna as a driving force for social development, while also underscoring the importance of collaboration between higher education institutions and the community in advancing Indonesia’s vision for 2045.
Co-Authors Ahmad Umam Aufi Alimatussa'diyah, Alimatussa'diyah Anwar, Amthori Arif Rakhman Suharso Ario Hendartono Dhesi Wulan Sari Erwin Sutantyo Evie Sirait Gunawan Budi Santoso Gunawan Budi Santoso Heri Kiswanto Indah Nurhidayati Juwarlan Juwarlan Juwarlan Khaeroman, Khaeroman Kumara, Rahindra Bayu Kurniawan, Fajarsari Ngatmin Ngatmin Ngatmin Ngatmin Ngatmin Ngatmin, Ngatmin Noviarianto, Noviarianto Purwanto Sri Tutie Rahayu Surapti, Fitri Susanto Susanto SUYONO Suyono Suyono Wahyu Ari Putranto Widar Bayu Wantoro Yulius Oscar