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All Journal Simetris Makara Journal of Science
Sutarto, Eko
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Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Sintering Temperature and Deposition Orientation Effects on Mechanical, Physical Properties and Geometric Distortion of Cu–Ni Single and Multi Material Indirect Sintering Products Widyanto, Susilo Adi; Sutarto, Eko
Makara Journal of Science Vol. 16, No. 2
Publisher : UI Scholars Hub

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Abstract

Development of multi material mechanical parts is constantly undertaken to increase functional aspectsas well as life cycle. One example is the use of bimaterial which is widely used as a temperature contactor. This paper presents mechanical, physical properties and geometric distortion of Cu-Ni indirect sintering products used to develop Cu-Ni bimaterial products. The experiment was executed with the following method: firstly, Cu and/or Ni powders were deposited into cast iron powder as the supporting powder. Secondly, it was heated in a furnace with varying temperatures of 870 C, 900 C and 930 C with a holding time of four hours. Lastly, deposition orientation was varied to observe the effect on the occurence of shrinkage. To initiate the multi materials sintering process, single material sintering was performed to observe the physical and mechanical properties. Based on previous work, multi material sintering of Cu and Ni powders was conducted. The experiment results showed that the geometric distortion of the sintering products was influenced by deposition orientation. The Cu and Ni products shrinkage were 49% and 35.33%, respectively. Although the melting temperature of Cu and Ni is close, the binding mechanism of the sintered product did not occur. The significant difference of shrinkage levels was the main factor for the binding mechanism failure between Cu and Ni materials.
Studi Eksperimental Karakteristik Pressure Drop Aliran Dua Fase Air – Udara pada Elbowmiter Mawarni, Drajat Indah; Sutarto, Eko; Junaidi, Muksan
SIMETRIS Vol 17 No 1 (2023): Simetris
Publisher : Sekolah Tinggi Teknologi Ronggolawe Cepu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51901/simetris.v17i1.333

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh belokan patah (elbow miter) tehadap pressure drop aliran dua fase. Penggunaan elbow pada sistem perpipaan sangat umum sekali karena untuk memenuhi kebutuhan desain dan geometri sistem perpipaan. Piranti uji menggunakan pipa acrylic dengan diameter dalam 32 mm pada posisi vertikal, disambung dengan elbow miter 45odan dilanjutkan dengan pipa dengan kemiringan 45o. Air dan udara digunakan sebagai fluida kerja. Pengujian dilakukan dengan variasi kecepatan superfisial cairan (USL) mulai 0,30-0,50 m/s dan kualitas volumetrik udara (β)= 0,06-0,22. Pola aliran didokumentasikan dengan kamera digital dan pengukuran pressure drop menggunakan manometer tipe-U. Hasil pola aliran dengan variasi range USL 0,30-0,50 m/s menunjukkan pola aliran bubble flow, seiring meningkatnya nilai USL konsentrasi bubble cenderung menempati inner elbow. Pressure drop aliran dua fase menurun seiring meningkatnya nilai β pada aliran hal tersebut dikarenakan menurunnya nilai massa jenis aliran. Pressure drop terendah terjadi pada USL 0,30 m/s dan β 0,22 yaitu sebesar 3628,591 N/m2, sedangkan nilai pressure drop tertinggi terjadi pada USL 0,50 m/s dan β 0,06 yaitu sebesar 3892,67 N/m2.
pengaruh variasi jenis arus las SMAW terhadap keretakan hasil pengujian bending dan struktur mikro pada material AISI 1010 Abidin, Moh. Hasyim Zaenul; Sutarto, Eko
SIMETRIS Vol 17 No 2 (2023): SIMETRIS
Publisher : Sekolah Tinggi Teknologi Ronggolawe Cepu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51901/simetris.v17i2.380

Abstract

This research aims to determine the effect of variations in the type of SMAW welding current on cracks that occur in bending tests and to determine the microstructure due to the influence of variations in the type of SMAW welding current on AISI 1010 material. The testing method carried out to support this research uses the bending test method and microstructure observation. Bending testing is used to determine the strength of the material after it has been welded using various types of welding current, whether cracks occur or not. Microstructural observations were used to determine the microstructure of AISI 1010 before and after welding using AC, DC-, and DC+ polarities. From the results of the welding bending test using AC current is better and does not experience cracks. This is because the ferrite content is higher than pearlite, because ferrite is soft. The shape of the microstructure of the AISI 1010 material which is welded using AC, DC-, and DC+ current types has changed in ferrite and pearlite.
Pengujian Bending & Struktur Mikro Sambungan Temu Bahan AISI 1010 dgn Variasi Arus pd Pengelasan SMAW Sutarto, Eko
SIMETRIS Vol 18 No 2 (2024): SIMETRIS
Publisher : Sekolah Tinggi Teknologi Ronggolawe Cepu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51901/simetris.v18i2.453

Abstract

The aim of this research is to determine the flexural strength of AISI 1010 material which meets the ASME BPVC acceptance criteria. IX QW-163 bending test results using the face bend test method, observing the possibility of cracks on the tensile side of the surface of the test object using the dye penetrant test method and the possibility of changes in the microstructure of the joints in electric arc welding with a current of 70, 80 and 90 A with using E6013 electrodes with a diameter of 2.6 mm. From the results of the bending test, the average bending stress data obtained from welds with currents of 70, 80, and 90A were 973.67, 986.3, and 1,049.46 MPa respectively, while from the observation results there were no cracks on the tensile surface of the test object, and from the comparison of microphotographs before and after welding there is no significant change in microstructure.
Co-Authors Abidin, Moh. Hasyim Zaenul Drajat Indah Mawarni JUNAIDI, MUKSAN Susilo Adi Widyanto