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All Journal APTEK IPTEKIN : Jurnal Kebijakan Pembangunan dan Inovasi
Gapar
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Economics, Econometrics & Finance Engineering Industrial & Manufacturing Engineering

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Effect of Recondition of Fracture Shaft Palm Lorry Using The Shielded Metal Arc Welding Process Hakim Nasution, Lukman; Eka Ariefyanto Putra; Gapar; Fajar Budiman; Rama Yoedha Satria; Andersen; Sofyan Hadi; Ferry Adriyan; Nasrol Akmal; Rinaldi; Nazaruddin; Safril Safar; Heri Suripto
Aptek Jurnal Apliksai Teknologi (APTEK): Volume 16, No. 02, Juni 2024
Publisher : Fakultas Teknik Universitas Pasir Pengaraian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30606/aptek.v16i2.2694

Abstract

Examination and analysis of the 2,640 working hours AISI 1045 palm lorry shaft fracture were carried out to determine the effect of reconditioning using Shielded Metal Arc Welding on the reliability of the shaft. Laboratory test results and analysis showed that the shaft experienced a static brittle fracture at an angle between 65 mm diameter and 90 mm diameter. For a long time, evidence of weld defects in the form of inclusions, porosity, and cold cracks in the Heat Affective Zone has been observed. The various hardness levels in the weld metal are 200 to 210 HV; HAZ is 280 to 386 HV, and base metal is 202 to 210 HV due to oxygen affecting on shaft's mechanical qualities deterioration. When the martensitic structure is produced, the carbon equivalent value rises to 15.66%, over the minimum value of 0.65%, reducing shaft reliability and triggering the occurrence of static brittle fracture. The macro-micro structure at the initial area of crack and fracture is bainite and ferrite-pearlite, while the shaft base material is ferrite-pearlite. Furthermore, there is a difference in tensile strength between the shaft material and the power of the electrodes utilized in the reconditioning process. From this experiment, the recondition
Analisis Potensi Pengembangan Komoditas Unggulan Udang Vaname (Litopenaeus vannamei) di Kabupaten Bengkalis, Provinsi Riau: - Riza, Subkhan; Gapar; Setyawati, Rafika
IPTEKIN Jurnal Kebijakan Pembangunan dan Inovasi Vol. 8 No. 1 (2025)
Publisher : Badan Riset dan Inovasi Daerah (BRIDA) Provinsi Riau

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The coastal area of Bengkalis Regency is extensive and holds significant potential for aquaculture development; however, much of this potential remains underutilized. The purpose of this research is to: 1) determine the existing condition of potential aquaculture resources, 2) analyze the fisheries sector's contribution to the economy, and 3) identify location-specific superior aquaculture commodities in Bengkalis Regency. This research employed a literature study method. Results indicate that out of 27,775.79 Ha of potential aquaculture land, only 233.22 Ha (8.40%) has been utilized. Specifically for shrimp ponds, only 129.03 Ha (9.06%) of the 1,423.89 Ha potential is in use. Although the fisheries sector's contribution to the Gross Regional Domestic Product (GRDP) from 2019 to 2023 remains relatively small (3.05%–6.22%), the Location Quotient (LQ) value (>1) indicates that fisheries is a base sector in Bengkalis Regency. Furthermore, agglomeration and specialization analyseswith an αit value of ∞ 1, it indicates that aquaculture is concentrated and is a specialized business activity.. The specific superior commodity identified is Vannamei shrimp (Litopenaeus vannamei), which is widely cultivated using intensive technology, efficient production facilities, and feed management..
Co-Authors Andersen Eka Ariefyanto Putra Ferry Adriyan Hakim Nasution, Lukman Nasrol Akmal Nazaruddin Rama Yoedha Satria Rinaldi Riza, Subkhan Safril Safar Setyawati, Rafika Sofyan Hadi Suripto, Heri