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All Journal Rekayasa Mesin International Journal of Mechanical Engineering Technologies and Applications (MECHTA)
Rudianto Raharjo
Brawijaya University
Automotive Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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The Effect of Sand Blasting on Shear Stress of Fiberglass - Shorea spp. Composite Teguh Dwi Widodo; Rudianto Raharjo; Victor Yuardi Risonarta; Redi Bintarto; Haslinda Kusumaningsih; Muhamad Hendra Saputra
International Journal of Mechanical Engineering Technologies and Applications Vol. 1 No. 1 (2020)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/mechta.2020.001.01.1

Abstract

A coating is widely applied to protect base material during contact with surrounding. One important application in engineering is to protect a boat hull. The coating is applied to boat hull to prevent a decrease of mechanical properties of base materials particularly with corrosive seawater. Composite coating is applied since the composite coating provides better protection compared to paint coating. Additionally, sandblasting prior to composite coating is worked out to improve the mechanical properties of the coating. This work investigated the influence of the projection angle of the sandblasting process on the shear strength of the coated surface. The projection angle of sandblasting was varied from 30 to 90 °. The result shows that a higher projection angle decreases the strain strength of the coating surface. The experiment work showed that the shear strength of 30°, 45 °, 60 °, and 90°projection angle are 1.02, 0.66, 0.38, and 0.24 MPa, respectively.
PENGARUH LAJU ALIR TUNGSTEN IN-ERT GAS TERHADAP KEKUATAN TARIK DAN KEJUT PADA SAMBUNGAN LAS TIG BAJA GALVANIS DAN ALU-MINIUM 5052 DENGAN FILLER AL-SI 4043 Redi Bintarto; Moh. Syamsul Ma’arif; Denny Widhiyanuriyawan; Teguh Dwi Widodo; Rudianto Raharjo; Nugroho Adi Purnomo
Jurnal Rekayasa Mesin Vol. 14 No. 1 (2023)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v14i1.656

Abstract

This study aims to determine the effect of the protective gas flow rate on the tensile and shock strength of welded joints of dissimilar metals, namely aluminum 5052 – galvanized steel with Al-Si 4043 filler using argon gas as a shielding gas. The protective gas flow rate parameters used in this study were 14, 17, and 20 liters/minute with a current of 80 A. The results showed that the higher the flow rate of the shielding gas, the lower the porosity defects that occurred in the welding results, resulting in higher tensile and shock strength values. Based on the analysis through the results of penetrant testing, it shows that the addition of the protective gas flow rate is given to reduce the porosity defects in the welding area. The surface area experiencing porosity decreases with the addition of the protective gas flow rate of 14, 17, and 20 liters/minute of 59.748%, 50.918%, and 48.857% respectively. The highest tensile strength was obtained from welding with a protective gas flow rate of 20 liters/minute of 20.01 MPa, then a protective gas flow rate of 17 liters/minute of 16.32 MPa, and the lowest at a protective gas flow rate of 14 liters/minute of 10 ,44 MPa. The highest shock strength is obtained from welding with a protective gas flow rate of 20 liters/minute of 0.5644 mJ/mm2, then a protective gas flow rate of 17 liters/minute of 0.4048 mJ/mm2, and the lowest is a gas flow rate protection 14 liters/minute of 0.2981 mJ/mm2.  
Co-Authors Denny Widhiyanuriyawan Haslinda Kusumaningsih Moh. Syamsul Ma’arif Muhamad Hendra Saputra Nugroho Adi Purnomo Redi Bintarto Teguh Dwi Widodo Victor Yuardi Risonarta