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All Journal JPSE (Journal of Physical Science and Engineering) Metal Indonesia Jurnal TAMBORA JURNAL TEKNIK Specta Journal of Technology Jurnal Konversi Energi dan Manufaktur Bima Abdi: Jurnal Pengabdian Masyarakat Jurnal Pijar MIPA JURNAL TEKNIK INDUSTRI Hexagon AMMA : Jurnal Pengabdian Masyarakat

Fauzi Widyawati

Metallurgical Engineering Study Program, Faculty Of Environmental And Mineral Technology, Sumbawa University Of Technology

Author-ID : 5551150

Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Nursing Physics Other

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ANALISIS PENGARUH MASSA SERAT TERHADAP SIFAT FISIS DAN MEKANIK PAPAN KOMPOSIT GIPSUM BERPENGUAT SISAL (AGAVE SISALANA) Muhammad Hisyam; Fauzi Widyawati
Hexagon Jurnal Teknik dan Sains Vol 2 No 1 (2021): HEXAGON - Edisi 3
Publisher : Fakultas Teknologi Lingkungan dan Mineral - Universitas Teknologi Sumbawa

Komposit berpenguat serat alam banyak diteliti dan dikembangkan karena sifatnya yang lebih ramah lingkungan sehingga dapat dengan mudah terdegradasi secara alami. Gipsum adalah salah satu produk material komposit yang digunakan sebagai bahan bangunan dan biasa dipakai sebagai partisi bangunan, plafon, sekat, dan asesoris ruangan. Akan tetapi gipsum juga memiliki kelemahan pada sisi keuletan dan tidak tahan air. Inovasi yang banyak dikembangkan saat ini adalah memodifikasi menggunakan jenis serat yang memiliki kekuatan dan kekakuan yang baik, bobot ringan serta biaya produksi yang murah agar dapat mengatasi kekurangan sifat fisik gipsum.Telah dilakukan penelitian mengenai pembuatan dan karakterisasi papan semen-gypsum dengan menggunakan serat sisal (Agave Sisalana) dan campuran semen PPC. Papan gipsum dibuat dengan memvariasikan persentase massa serat sisal. Variasi persentase massa serat yang digunakan dalam penelitian ini yaitu 0%, 2%, 4%, 6%, 8%. Dalam penelitian ini, gipsum komersial digunakan sebagai pembanding. Variasi persentase massa serat paling optimum untuk pembuatan papan gipsum yaitu pada persentase serat 0%. Untuk karakterisasi sifat fisis diperoleh densitas 1.185 g/cm3 dan daya serap air 42,53%. Hasil pengujian densitas pada semua variasi sampel telah memenuhi standar acuan yaitu SNI 01-4449-2006 dan nilai daya serap yang diperoleh pada semua variasi sampel telah memenuhi standar acuan yaitu JIS A-5908-2003.

PENGARUH VOLUME SERBUK TERHADAP LAJU PENYERAPAN AIR PADA KOMPOSIT PARTIKEL TONGKOL JAGUNG (CORN COB) DENGAN MATRIKS EPOKSI Maulana Malik Ibrahim; Rita Desiasni; Fauzi Widyawati
Hexagon Jurnal Teknik dan Sains Vol 2 No 1 (2021): HEXAGON - Edisi 3
Publisher : Fakultas Teknologi Lingkungan dan Mineral - Universitas Teknologi Sumbawa

Serbuk tongkol jagung adalah limbah alam yang digunakan sebagai penguat pada komposit papan partikel. Limbah tongkol jagung sangat berlimpah di Kabupaten Sumbawa Besar, NTB. Pada umumnya tongkol jagung mengandung bahan selulosa murni yang dapat menjadi bahan pengisi alternatif karena sifat seratnya yang kuat (modulus tinggi). Antara rantai-rantai selulosa terdapat ikatan hidrogen yang kuat, sehingga menghasilkan struktur kristalin. Untuk menentukan sifat fisik terhadap limbah tongkol jagung dalam pemanfaatannya. Oleh karena itu limbah tongkol jagung dijadikan sebagai media komposit papan partikel. Serbuk tongkol jagung menggunakan ukuran partikel 70 Mesh dengan variasi volume 30%, 40%, 50%, 60%, 70%. Pembuatan komposit dilakukan dengan metode hand lay up dengan campuran resin epoxy dan hardener menggunakan standar pengujian SNI 03-2105-2006. Hasil yang diperoleh dari uji daya serap air menunjukkan bahwa semakin meningkat variasi volume yang digunakan pada komposit maka semakin tinggi daya serap air pada papan partikel dan semakin lama waktu perendaman yang digunakan makan semakin tinggi persentase yang didapatkan. Sedangkan hasil dari persentase berat terendah yaitu pada variasi volume partikel 30% dengan lama waktu 24 jam sebesar 1.4% dan persentase tertinggi yaitu pada variasi volume partikel 70% dengan lama waktu perendaman yaitu 72 jam sebesar 14.2%. Dari hasil penelitian yang dilakukan menunjukkan bahwa komposit serbuk tongkol jagung dengan resin epoxy pada variasi volume 30% yang lebih baik dibandingkan dengan variasi volume 70%.

SINTESIS MANGANESE FERRITE DENGAN METODE MECHANICAL ALLOYING DARI BIJIH MANGAN ALAM syamsul bahtiar; Imam Wierawansyah Eltara; Fauzi Widyawati; Syamsul Hidayat
Hexagon Jurnal Teknik dan Sains Vol 3 No 1 (2022): HEXAGON - Edisi 5
Publisher : Fakultas Teknologi Lingkungan dan Mineral - Universitas Teknologi Sumbawa

One of the largest natural resources of manganese ore in Indonesia is located in the Regency of Sumbawa Besar and has high manganese content. Manganese ore can be used to form manganese ferrite compounds. The synthesis of manganese ferrite (MnFe2O3) consists of an alloy of manganese ore (MnO2) and hematite (Fe2O3) obtained from mill scale steel production waste. The two particles are then combined by the mechanical alloying method. Manganese ore is first calcined at temperature variations of 400oC, 500oC, and 600oC. The mechanical alloying process of manganese and hematite ore by varying the amount of manganese ore 1: 1, 1: 2, 1: 3, 1: 4. Furthermore, the mixture of particles was calcined at a temperature of 1100oC for 3 hours to obtain homogeneous manganese ferrite. Initial XRD characterization obtained manganese ore in the form of pyrochroite (Mn(OH)2) and after calcination at a temperature of 500oC pyrolusite (MnO2) was formed. The final results of XRD and XRF characterization showed that the addition of MnO2 to Fe2O3 produced manganese ferrite bixbite (MnFe2O3) with a formation intensity of 70%. Dominant MnFeO3 phase at a 4: 1 ratio. The more MnO2 added to Fe2O3, the more manganese ferrite bixbite phases are formed.

Indonesia PENGARUH UKURAN PARTIKELTERHADAP SIFAT FISIK DAN MEKANIK KOMPOSIT LIMBAH GERGAJI KAYU JATI DENGAN MATRIK RESIN EPOXY: PENGARUH UKURAN PARTIKELTERHADAP SIFAT FISIK DAN MEKANIK KOMPOSIT LIMBAH GERGAJI KAYU JATI DENGAN MATRIK RESIN EPOXY rita desiasni; Fauzi Widyawati; Riza Monica
Hexagon Jurnal Teknik dan Sains Vol 3 No 1 (2022): HEXAGON - Edisi 5
Publisher : Fakultas Teknologi Lingkungan dan Mineral - Universitas Teknologi Sumbawa

The physical and mechanical properties of particle composite materials are influenced by particle size. Variations in particle size will form different physical and mechanical properties. The size variations used are 100 mesh, 150 mesh, 200 mesh. The comparison between matrix and particles is 70% : 30% using the hand lay-up method. The test consists of physical tests, namely density and thickness expansion as well as mechanical tests consisting of Modulus Of Rapture (MOR) and Modulus Of Elasticity (MOE). The results of the physical density test were at a value of 0.93-1.02 g/cm3, the best density was at a particle size of 100 mesh with a value of 1.02 g/cm3. While the thickness test obtained values ??ranging from 9.3-9.8%, with the highest thickness development of 9.8% at a particle size of 100 mesh. While the results of the mechanical test itself, all variations in mesh size meet the standard, namely the highest MOR test is obtained in the 100 mesh variation, with a value of 341.15 kgf/cm2, while in the MOE test none of which meets the standards of SNI 03-2105-2006, the highest mesh variation is obtained by mesh. obtained at mesh 100 that is 8072.49 kgf/cm2.

Physical and Mechanical Properties of Fiber Board from Corn Husk Fiber Rita Desiasni; Fauzi Widyawati; Yuliana Fitri Sersaningsih; Syamsul Bahtiar; Amirin Kusmiran
JPSE (Journal of Physical Science and Engineering) Vol 7, No 2 (2022): JPSE (Journal of Physical Science and Engineering)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar

Using agricultural waste materials, namely corn husk fiber (CHF), to reduce agricultural waste and recycle corn husk waste into sustainable engineering materials is relatively significant due to the decreasing number of woods. This study aims to analyze the effect of the volume fraction of CHF with polyester (PE) on the physical and mechanical strength of fiberboard composites with variations in volume fraction of 25 percent fiber : 75 percent PE, 50 percent fiber : 50 percent PE, and 75 percent fiber : 25 percent PE. Composites are made by the hand layup method. Fibers were pretreated by immersing 5 percent NaOH for 2 hours. The results of testing the physical properties of the highest density composite board at a volume fraction of 25 percent fiber : 75 percent PE of 0.85 g/cm³ and the lowest moisture absorption value was at 0.49 percent. The results of the mechanical board test in the form of the modulus of elasticity (MOE) test got the highest test value at the fiber volume fraction 25 percent fiber : 75 percent PE, which was 1179.2 MPa as well as the highest modulus of rupture (MOR) test value was found in the volume fraction 25 percent fiber: 75 percent PE that is equal to 9.4 MPa. Based on this result research, the average strength of the mechanical properties increases with the increase in the number of matrices. That indicates a reasonably good bond between the fiber and the matrix. The results of the water content test also increased as the density value increased.DOI: 10.17977/um024v7i22022p134

SIFAT FISIK DAN MEKANIK KOMPOSIT PAPAN PARTIKEL BERDASARKAN VARIASI UKURAN SERBUK KAYU MAHONI (SWIETENIA MACROPHYLLA) SEBAGAI MATERIAL ALTERNATIF : PAPAN KOMPOSIT Rita Desiasni; Nur Azman; Fauzi Widyawati
Jurnal TAMBORA Vol. 7 No. 2 (2023): EDISI 19
Publisher : Wakil Rektor 3, Direktorat Riset, Publikasi dan Inovasi, Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36761/jt.v7i2.2714

Sifat fisik dan mekanik material papan komposit dipengaruhi oleh ukuran partikel. Variasi ukuran partikel akan membentuk sifat fisik dan mekanik yang berbeda. Variasi ukuran yang digunakan yaitu 20 mesh, 40 mesh, 60 mesh dan 80 mesh. Perbandingan matrix dan partikel yaitu 70% : 30 % menggunakan metode hand lay-up. Pengujiannya terdiri dari uji fisik yaitu kerapatan dan pengujian mekanik yang terdiri dari Modulus of Rupture (MOR) dan Modulus of Elasticity (MOE). Hasil pengujian fisik kerapatan berada pada nilai 0.76 gr/????????3 – 0.84 gr/????????3, kerapatan terbaik pada ukuran partikel 80 mesh dengan nilai 0.84 gr/????????3. Secara keseluruhan kerapatan papan komposit pada semua sampel memenuhi standar JIS A 5908 (2003) rentang nilai kerapatan 0.4 gr/????????3 – 0.9 gr/????????3. Sedangkan Modulus of Rupture MOR tertinggi terdapat pada variasi 80 mesh dengan nilai 29.1 MPa dan hasil terendah pada uji Modulus of Rupture (MOR) papan komposit pada 20 mesh dengan nilai 8.4 MPa. Hasil MOR Papan komposit memenuhi Standar JIS A 5908 (2003) dengan standar minimal 7.8 MPa. Sedangkan untuk nilai MOE menunjukkan hasil Modulus of Elasticity (MOE) maksimal pada 60 mesh yakni 1155.9 MPa. Namun hasil pengujian MOE belum memenuhi standar JIS A 5908 (2003) yang memiliki standar minimal papan komposit sebesar 1961 MPa.

ANALISIS PENGARUH PENAMBAHAN SISAL TERHADAP SIFAT FISIK DAN MEKANIK PADA BATA RINGAN AAC (AUTOCLAVED AERATED CONCRETE) fauzi widyawati
Hexagon Vol 4 No 2 (2023): HEXAGON - Edisi 8
Publisher : Fakultas Teknologi Lingkungan dan Mineral - Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36761/hexagon.v4i2.2965

AAC lightweight brick (Autoclaved Aeration Concrete) is a type of brick that has a lighter density compared to other types of brick in general. This type of brick is widely applied as walls in buildings. The manufacture of lightweight bricks is much modified from the materials used. As is the case with the addition of sisal fiber (Agrave sisalana) which is added to the lightweight brick mixture. Sisal fiber was added to increase the strength value of lightweight bricks. The purpose of this study was to determine the effect of adding sisal fiber to AAC-type light bricks with the variations used, namely 0%, 2%, 4%, and 6% on the physical and mechanical properties of light bricks. The addition of sisal fiber to lightweight bricks resulted in a decrease in the physical properties of AAC lightweight bricks by volume weight (BV), but the sample values of 0%, 2%, 4%, and 6% still met the standard by volume weight of lightweight bricks according to SNI 03-0349 -1989 which is 0.600-1.600 g/cm³. For the water absorption (Absorption) test the results obtained increased, this was due to the factor of the variation in the addition of fiber which was high enough so that the absorption value of water increased and the pores in the light bricks were not completely filled. For mechanical testing, namely compressive strength, the results obtained decreased, this was due to the fact that the sisal fiber experienced the phenomenon of material segregation.

Analisis Laju Korosi Sambungan Baja ASTM-A36 dengan Variasi Arus Pengelasan dalam Media Air Laut Fauzi Widyawati, Widyawati
Jurnal Teknik Vol 12, No 2 (2023): Juli - Desember 2023
Publisher : Universitas Muhammadiyah Tangerang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31000/jt.v12i2.9555

Steel plate is a component that has an important role in making the design, especially on the hull of the ship. In the manufacture of shipbuilding, it is impossible to form without the welding process. Welded steel will experience changes in grain size differences which result in the emergence of anode and cathode areas which are potential for corrosion. This study aims to examine the corrosion behavior of ASTM A36 steel which has been welded using SMAW welding with variations in welding current in seawater medium for seven days. To study the corrosion properties of ASTM A36 steel welds, 15 specimens were welded with 5 variations of welding current, namely 60 A, 70 A, 80 A, 90 A, and 100 A. Corrosion was measured according to the ASTM G31-72 standard with the weight loss method. The results showed that the most efficient welding current was at a welding current of 70 A with an average corrosion rate of 20.8970 mpy. The highest corrosion rate was found in the welding current sample of 100 A with an average corrosion rate of 28.2327 mpy.

Analisis Variasi Temperatur Artificial aging Terhadap Struktur Mikro dan Sifat Mekanik Pada Aluminium 6061 T6 Widyawati, Fauzi; Solahudin, Muhammad Miftah; Hidayat, Syamsul
SPECTA Journal of Technology Vol. 8 No. 1 (2024): SPECTA Journal of Technology
Publisher : LPPM ITK

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/specta.v8i1.1016

Aluminum alloy 6061 series has been used extensively in the manufacturing industry. This aluminum material was chosen because it has many advantages. The level of superiority of aluminum can be seen in terms of good machining ability, perfect surface finish, good level of corrosion resistance, and high strength. In this research, the samples used 6061 series aluminum alloy, and an artificial aging process was carried out with temperature variations of 150ᴼC, 175ᴼC, 200ᴼC, and a holding time of 8 hours. Following this, measurements were performed for hardness, impact, and microstructural observations. The research shows that the mechanical properties of the alloy after the artificial aging process tend to decrease as temperature variations increase, for the hardness value obtained at 150ᴼC is 57.34 HRB, 175ᴼC is 55.42 HRB, 200ᴼC is 46.12 HRB. For the impact value, the optimal value was obtained at a temperature of 150ᴼC with a value of 41.4 J/mm2. When the microstructure was examined, it was discovered that each specimen's AlMg2Si compound was the consequence of the artificial aging process.

PENGARUH VARIASI VOLUME LIMBAH SERBUK KAYU MAHONI TERHADAP KEKUATAN FISIK, MEKANIK DAN MIKROSTRUKTUR KOMPOSIT PARTIKEL Desiasni, Rita; Widyawati, Fauzi; Nabila, Maitsa Fikri; Saiful, Muhammad
Hexagon Jurnal Teknik dan Sains Vol 5 No 2 (2024): HEXAGON - Edisi 10
Publisher : Fakultas Teknologi Lingkungan dan Mineral - Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36761/hexagon.v5i2.4143

The strength of the mechanical and physical properties of particle composite materials is influenced by the volume fraction of the powder and matrix. The pretreatment was carried out by soaking 2% NaOH for 1 hour. The results of the MOE treatment mechanical highest test value at the powder volume fraction of 30:70%, which was 6145.51 kgf/cm² and the highest MOR test value at the 30:70% volume fraction, which was 167.38 kgf/cm². Meanwhile, the highest non-treatment MOE value at the 30:70% powder volume fraction was 5540.9 kgf/cm² and the highest MOR test value at the 30:70% volume fraction was 156.6 kgf/cm². The results of the physical properties test were the highest density at the 30:70% powder volume fraction of 0.87 gr/cm³ and the highest density at the 30:70% non-treatment powder volume fraction of 0.78 gr/cm³. The results of the MOE mechanical test do not meet the JIS A 5908-2003 standard while the MOR mechanical test and physical test have met the JIS A 5908- 2003 standard. The results of microstructure testing showed that at a fraction of powder volume of 30:70% it was seen that the particles were coarser which blended perfectly with the matrix.

Co-Authors Amirin Kusmiran Andani Nurul Hidayah Angga Setiawan Anggina Kalara Bahtiar, Syamsul Chandra, Rico Dian Anggreini Dwi Nurul Fitriah Assyurah fatmawati hendrik fatma Hermanto, Koko I Putu Widiantara Imam Wierawansyah Eltara izzul islam Jayatri, Adella Ulyandana Kholida Tul Khairy Maksum, Hanni Malik Fajar Fatoni Marano, Lino Maulana Malik Ibrahim Muhammad Hisyam Muhammad Nurdin Muhammad, Saiful Musbihin Musbihin Nabila, Maitsa Fikri Nur Azman Okviyanto, Toni Prayoga Setyawan, Harry Ramadhan, Risky Ridwan Tanjung Rita Desiasni Rita Desiasni Riza Monica Setiawan, Apri setiawan, Dibyo Setyaningtyas, Ayunda Kinasih Shinta Esabella Solahudin, Muhammad Miftah Subeno, Agus Sumarna, Herlin Supianto Cibro Syamsul Bahtiar Syamsul Bahtiar Syamsul Hidayat Syamsul Hidayat Syamsul Hidayat SYAMSUL HIDAYAT Wafdan Muzakki Wiradana, Aditya Yanti, Sahri Yanuar, Emsal Yuliana Fitri Sersaningsih Zahra, Karen

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