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Pengaruh Transformasi Ketahanan Mekanik Akibat Proses Quenching terhadap Material Pipa Minyak dan Gas pada Pengujian Bending: Penelitian Alexander Sebayang; Fida Hanum; Muhammad Ariyon; Fitriati; Ira Herawati; Efrata Tarigan; Idhamkamil; Liwat Tarigan
Jurnal Pengabdian Masyarakat dan Riset Pendidikan Vol. 2 No. 4 (2024): Jurnal Pengabdian Masyarakat dan Riset Pendidikan Volume 2 Nomor 4 (April 2024
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jerkin.v2i4.1610

Abstract

Pada perkembangan dan kemajuan dalam dunia minyak dan gas yang semakin pesat, pemilihan material dan penyambungan pada material tidak bisa dilepaskan. Dengan demikian, pemilihan material dan metode pengelasan pipa penyalur minyak dan gas bumi harus mengacu pada standar yang ada. Proses perlakuan panas quenching merupakan salah satu metode yang efektif untuk meningkatkan sifat mekanik material logam, khususnya pada kekuatan bending. Penelitian ini bertujuan untuk membandingkan kekuatan bending material dalam kondisi raw material dan setelah melalui proses quenching. Pengujian dilakukan pada dua jenis pembebanan, yaitu root bend dan face bend. Hasil pengujian menunjukkan bahwa material yang telah mengalami proses quenching memiliki nilai kekuatan bending yang lebih tinggi, masing-masing sebesar 1377,41 MPa untuk root bend dan 1339,43 MPa untuk face bend, dibandingkan dengan raw material yang memiliki kekuatan 1110,63 MPa dan 1141,67 MPa. Peningkatan ini menandakan bahwa proses quenching mampu meningkatkan ketahanan material terhadap beban lentur, baik pada sisi akar maupun permukaan spesimen. Fenomena ini diduga disebabkan oleh terbentuknya struktur martensit yang lebih keras dan padat akibat pendinginan cepat selama proses quenching. Temuan ini sejalan dengan berbagai literatur ilmiah yang menunjukkan bahwa transformasi mikrostruktur menjadi martensit berkontribusi signifikan terhadap peningkatan kekuatan mekanik material.
Implementing an Inquiry-Based Learning Model to Deepen Students’ Conceptual Understanding Hanum, Fida; Sebayang, Alexander; Ariyon, Muhammad; Tarigan, Efrata; Herawati, Ira
Journal La Edusci Vol. 6 No. 5 (2025): Journal La Edusci
Publisher : Newinera Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37899/journallaedusci.v6i5.2645

Abstract

This study examines the effectiveness of the Inquiry-Based Learning model in enhancing students’ conceptual understanding of the SMAW and GMAW welding processes, an area that remains underexplored in vocational education. The research addresses the gap between the development of procedural skills and the acquisition of conceptual reasoning by investigating whether inquiry-oriented instruction can promote deeper cognitive engagement. A quasi-experimental design was implemented involving two intact groups, with the control group receiving conventional teacher-centered instruction and the experimental group experiencing structured IBL activities. Data were collected through pretests, posttests, observations, and semi-structured interviews, and analyzed using paired-sample and independent-sample t-tests, ANCOVA, effect size calculations, and normalized gain measures. The findings reveal that the experimental group demonstrated a substantial and statistically significant improvement in conceptual understanding compared with the modest gains observed in the control group. The intervention produced a very large effect size and a medium-high normalized gain, indicating strong learning effectiveness. Students exposed to IBL were better able to analyze parameter interactions, interpret defect mechanisms, and connect theoretical principles with laboratory outcomes. Overall, the study provides strong empirical evidence that Inquiry-Based Learning is a highly effective pedagogical approach for strengthening conceptual mastery in welding technology and should be considered for broader integration into vocational curricula.
Edukasi Efisiensi Penggunaan Bahan Bakar Fosil di SMPN 1 Kuantan Hilir Baserah Kabupaten Kuantan Singingi Provinsi Riau Muhammad Ariyon; Ellyan Sastraningsih; Elizar Elizar; Utary Aurellia Verdo
CANANG: Jurnal Pengabdian Masyarakat Vol 5, No 1 (2025)
Publisher : PELANTAR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52364/canang.v5i1.55

Abstract

For millions of years, fossil fuels have been the main source of energy for both industry and everyday households. However, over-reliance on these fuels has had many negative consequences for the environment and health. Knowledge about the environmental impacts resulting from the use of fossil fuels is very important, because society will feel the impacts both directly and indirectly from the activities of using fossil fuels. Especially in remote areas or inland areas where there is still a lack of information about the potential environmental impacts of the use of fossil fuels. Therefore, it is very necessary to provide education and counseling for the public from an early age so that they receive information and enlightenment about the importance of efficient use of fossil fuels to reduce the environmental impacts they cause. The targets of community service activities are students of SMPN 1 Kuantan Hilir, Baserah District, Kuantan Singingi Regency, Riau Province. By understanding the importance of fossil energy efficiency from an early age, it is hoped that the younger generation can become a generation that cares more about the environment and the future of the earth