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All Journal Journal of the Medical Sciences (Berkala Ilmu Kedokteran) Jurnal Simetris Indonesian Journal of Cancer Emerging Science Journal Civil Engineering Journal Indonesian Journal of Clinical Pathology and Medical Laboratory (IJCPML) Mekanika: Majalah Ilmiah Mekanika JURNAL ILMIAH MAKSITEK Abdi Masya Jurnal Abdikarya : Jurnal Karya Pengabdian Dosen dan Mahasiswa JKKI : Jurnal Kedokteran dan Kesehatan Indonesia Indonesian Journal of Cancer IJRETINA - International Journal of Retina Engagement: Jurnal Pengabdian Kepada Masyarakat
Teguh Triyono
Department Of Clinical Pathology, Faculty Of Medicine, Public Health, And Nursing, Universitas Gadjah Mada-Dr. Sardjito General Hospital, Yogyakarta, Indonesia
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mechanical Engineering Medicine & Pharmacology Neuroscience Public Health Social Sciences Other

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Effect of Cu and SiO₂ on a Remelted-Recycled Piston Alloy Under Vertical Centrifugal Casting Conditions Triyono, Teguh; Surojo, Eko; Prabowo, Aditya Rio; Triyono, Triyono; Djordjevic, Branislav; Carvalho, Hermes; Adie, Prayoga Wira; Sholehuddin, Muhammad Ilham
Civil Engineering Journal Vol. 12 No. 1 (2026): January
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2026-012-01-020

Abstract

Functionally graded aluminum matrices produced by means of centrifugal casting offer a route to location-specific properties, yet sustainable feedstocks and dual-density reinforcements are less well explored. In this work, we evaluate vertical centrifugal casting (VCC) of a remelted, recycled piston alloy reinforced with silica (SiO₂) and copper (Cu) particulates selected for their contrasting densities relative to the matrix. Castings were produced at 1000 rpm for 5 minutes using a 500 °C preheated mold and an 800 °C pour temperature. Cu was added at 1–4 wt.% and SiO₂ was added at 0–9 wt.%. Bulk density/porosity measurements, Vickers hardness testing, and optical/SEM microstructural analysis were employed to characterize the resulting gradients. The density increased with the radial distance from the rotation axis, accompanied by a monotonic decrease in porosity, consistent with centrifugal separation. Microstructurally, SiO₂ concentrated toward the inner region near the rotation center; in comparison, Cu was enriched at the outer periphery. Correspondingly, hardness exhibited a spatial gradient: SiO₂-reinforced zones were hardest near the inner region, whereas Cu-rich outer zones were hardest at the external rim. These results demonstrate that VCC of a recycled Al–Si feedstock can be used to reliably tailor its microstructure and properties through density-driven particle segregation, enabling controllable, bidirectional functional grading using environmentally friendly starting materials.
Addressing Disparities in Clean and Healthy Living Behaviors through Targeted Health Education in a Rural Community Widodo, Irianiwati; Rinonce, Hanggoro Tri; Asysyifa, Azzahra; Syarifa, Cut Alima; Sabila, Aflifia Birruni; Nurrahma, Bira Arumndari; Farmawati, Arta; Sari, Dwi Cahyani Ratna; Nugrahaningsih, Dwi Aris Agung; Jaya, Sudi Indra; Sholikhah, Eti Nurwening; Rizal, Dicky Moch; Susilowati, Rina; Nuryastuti, Titik; Murhandarwati, E. Elsa Herdiana; Triyono, Teguh; Ratnaningsih, Tri
Engagement: Jurnal Pengabdian Kepada Masyarakat Vol. 10 No. 1 (2026): February 2026
Publisher : Asosiasi Dosen Pengembang Masyarajat (ADPEMAS) Forum Komunikasi Dosen Peneliti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29062/engagement.v10i1.2043

Abstract

Background: This study addresses the public health issue of community hygiene and wellness by focusing on the Clean and Healthy Lifestyle Behavior (CHLB) as a key parameter. The subject of the assessment is the community of Sompok Hamlet, Bantul, with the purpose of evaluating the implementation of CHLB within households to understand areas of strength and needed improvement. Purpose of the Study: The purpose is to assess the level of CHLB implementation in Sompok Hamlet. The objective is to measure household compliance across various CHLB indicators and identify specific behavioral gaps that require targeted intervention. Methods: The study employed a cross-sectional survey design conducted in 2023. Data were collected from 202 households across seven neighborhood units (RT) using a structured questionnaire to evaluate compliance with standard CHLB indicators. Results: The results showed that 68.3% of households met the criteria for independent healthy communities. High compliance was observed in indicators like access to clean water, sanitation, exclusive breastfeeding, and toddler weighing. However, significant gaps were identified in physical activity (71.3% low compliance) and indoor smoking practices (64% low compliance). Practices related to fruit/vegetable consumption, handwashing, and larva elimination showed varied results. The findings highlight the need for focused educational programs to address these specific behavioral deficiencies to promote sustainable community health.
The Effect of Stirrer Depth And Electroless Coating of Hardness And Tensile Strength in Aluminium Matrix Composite AL6061-AL2O3 Andini, Sukma; Surojo, Eko; Triyono, Teguh
Mekanika: Majalah Ilmiah Mekanika Vol 20, No 1 (2021): MEKANIKA: Majalah Ilmiah Mekanika
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/mekanika.v20i1.48073

Abstract

Metal Matrix Composite (MMC) are composite materials that are widely used in the industrial sector. Examples of metal matrix composites are Al6061 as matrix alloys and Al2O3 as reinforcement. In general, making Al6061-Al2O3 composites using the stir casting method. This research was conducted to determine the effect of the depth of stirring and electroless coating treatment on the hardness and tensile strength of Al6061-Al2O3 composites. The process of making composites with Al2O3 reinforcing particles with 6% weight fraction mixed with aluminium alloys and 2.5% magnesium powder as a wetting agent. Variations of this study were the depth of the stirrer and electroless coating treatment. The depths of stirring used for the experiment were 30%, 45%, and 60% of the height of the fluid. The testing phases in this study were the density and porosity test, metallographic observation, hardness test, and tensile test. The most efficient variation of the mixer depth was obtained at a mixer depth of 30% of the fluid height. The highest hardness and tensile strength test results are hardness value of 72.43 Brinell Hardness (HB) and tensile strength of 182.19 MPa with electroless coating reinforcement treatment.
Co-Authors Abdul Salam Sofro Adie, Prayoga Wira Aditya Rio Prabowo Aditya Wicaksana Aflifia Birruni Sabila Agiel, Raiddin Muhamad Agni, Angela Nurini Akbar, Hammar Ilham Anak Agung Wiradewi Lestari Andini, Sukma Andri Christianalusi Arta Farmawati Asysyifa, Azzahra Bambang Margono Budi Mulyono Budi Mulyono Caesar Haryo Bimoseno Carvalho, Hermes Chamim, Moch. David Dwi Putera DIAN A.P PURWANTO Dicky Moch Rizal Dicky Moch Rizal Djordjevic, Branislav Dwi Aris Agung Nugrahaningsih Dwi Cahyani Ratna Sari E. Elsa Herdiana Murhandarwati Eko Surojo Endang Yuniastuti Eti Nurwening Sholikhah Fridawati, Veronica Fuad Anshori Hanggoro Tri Rinonce Hanifah, Shabrina Hans Vrielink Harjo Seputro, Harjo Harsito, Catur Ilham Habibi, Ilham Indra Tri Mahayana Jarir At Thobari Jaya, Sudi Indra Johan Kurnianda Jonliberti Purba Kaslam, Surawijaya Bakhtiar Majid, Faishal M. Mardiah Suci Hardianti Muhammad Luthfi Neti Nurani Ni Kadek Mulyantari Nurrahma, Bira Arumndari Nurul Muhayat Pramudi, Ganjar PRITA MURANI NUGRAHETI PURWANTO, DIAN A.P Raehanul Bahraen Raharjo, Wijang W. Rina Susilowati Sholehuddin, Muhammad Ilham Singgih Dwi Prasetyo Sri Mulatsih Sri Mulatsih Suhardjo Suhardjo Sukmaji Indro Cahyono, Sukmaji Indro Surawijaya Bakhtiar Kaslam Sutaryo Sutaryo Syahru Agung Setiawan Syarifa, Cut Alima Titik Nuryastuti Tri Ratnaningsih Tri Ratnaningsih Triyono Triyono Triyono Ubaidillah Ubaidillah Umi Solekhah Intansari Usi Sukorini Veronica Fridawati Widodo, Irianiwati Wijang Wisnu Raharjo Zainal Arifin