Article Per Year (5 Year)
p-Index From 2020 - 2025
0.659
P-Index
This Author published in this journals
All Journal Dinamika Teknik Mesin : Jurnal Keilmuan dan Terapan Teknik Mesin
A. Zainuri, A.
Unknown Affiliation
Aerospace Engineering Automotive Engineering Mechanical Engineering Physics

Published : 5 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 5 Documents
Search

 1 
Pengaruh media pendingin dan waktu pada perlakuan pack carburizing-quenching baja karbon rendah SS400 Sujita, S.; Yudhyadi, I.G.N.K.; Zainuri, A.; Adhi, I.G.A.K.C.; Sutanto, R.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 11, No 2 (2021): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (517.339 KB) | DOI: 10.29303/dtm.v11i2.471

Abstract

The SS400 low carbon steel is widely used in the agricultural equipment industry because of its specific properties, malleability good corrosion resistance, and high strength to weight ratio. However, according to several research results it has several weaknesses, low surface hardness, ductility and wear resistance. Therefore, it is necessary to improve its mechanical properties so that the agricultural equipment products produced are of better quality. The purpose of this study was to determine the effect of variations in time and cooling media in the pack carburizing-quenching treatment of SS400 steel specimens. The pack carburizing treatment was carried out at a temperature of 875 ºC, 90 minutes, the carburizing medium was a mixture of corncob charcoal powder and Picntada maxima shell powder, with a composition of 70%: 30%, followed by a quenching process with variations in time (1, 2, 3, 4). minutes) and cooling medium (water, oil SAE 40, cane molasses 10% and  cane molasses 30%. The results of the study showed that the time and cooling medium affected the surface hardness, ductility and microstructure of the specimens With 30% cane molasses cooling medium, quenching time of 4 minutes, the largest specimen absorbed impact energy (toughness) is 2.23 J/mm2. On the other hand, the lowest surface hardness number is 285 Kg/mm2.The increased ductility causes the cracking marks to disappear on the specimen surface. Based on observations with SEM, there is a decomposition of the martensite structure with coarser grain sizes. 
Perhitungan laju korosi dan perancangan sistem proteksi katodik anoda korban di lambung kapal tugboat Bontang o4 PT Badak NGL Bontang Saputra, R.A.; Setyawan, P.D.; Sugiman, S.; Zainuri, A.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 7, No 2 (2017): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (502.829 KB) | DOI: 10.29303/dtm.v7i2.158

Abstract

Corrosion happens differently for each point of hull plate which caused of corrosion rate differences. So that is very important to measure it for each point, which is calculated using Weight Gain Loss Method. The measurement of plate thickness that used is Ultrasonic Test Method conducted by PT BKI. To determine the condition of ship protection, then the coating and sacrificial anode system is evaluated by testing the composition and current and voltage of anode as well. Furthermore, the number and position of anode is also analyzed. So that the re-design of cathode protection is needed by referring to the PT BKI’s standards. Then the prediction of corrosion rate is calculated by using the design of cathode protection. The largest corrosion rates are in the amidships and portside for each plate lane, they are on the keel plate point K3 is 0.37 mm/years, pedestal plate point A4 is 1.05 mm/years, bilge plate point B4 is 0.62 mm/years and side plate point C5 is 0.39 mm/years. But the number of installed anode is 31 anodes with an irregular position. So in this study, done the redesign system of cathode protection based on regulations issued by PT BKI, with the result of the number of the anode is 56 units. Using the design, then carried a prediction by the result is lower, that on the keel plate is 0.073 mm/years, pedestal plate is 0.021 mm/years, bilge plate is 0.013 mm/years and the side plate is 0.014 mm/years.
Karakterisasi polyester komposit berpenguat serat pohon pisang saba dengan filler carboxyl terminated butadiene acrylonitryle sebagai material bumper otomotif Sujita, S.; Sulistyowati, E. D.; Zainuri, A.; Sinarep, S.; Pandiatmi, P.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 12, No 2 (2022): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v12i2.525

Abstract

The bumper is one part of the vehicle that has a very important role. In addition to functioning as aerodynamics and aesthetics to attract consumers, the bumper also functions as a damper and a buffer against impact (shock/impact force) in the event of an accident. Therefore, the material used as the bumper, especially the rear bumper, is often damaged, so a material that has good tensile strength and impact toughness is needed. In this research, the object of the research is the polyester matrix composite. The research aspect is more emphasized on the effect of using Musa acuminata stem fiber (MASF) as a reinforcement and filler of Carboxyl Terminated Butadiene Acrylonitryle (CTBN) on changes in tensile strength and impact toughness. The results of the study show. the addition of MASF volume fraction and CTBN filler increased the tensile strain, impact toughness, impact energy, but decreased the tensile strength of the polyester matrix composite material. The change in mechanical properties is due to the bonding of MASF with CTBN and polyester with CTBN, so that the impact toughness and ductility of the specimen increases, because CTBN is elastic.
Analisa pengaruh jumlah indentasi dan distribusi tegangan geser pada sambungan perekat baja-baja (paper ini telah dicabut) Salman, S.; Sugiman, S.; Sulistyawati, E.D.; Zainuri, A.; Robiansyah, R.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 9, No 2 (2019): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (66.346 KB) | DOI: 10.29303/dtm.v9i2.282

Abstract

Adhesive joints are widely used in automotive industry and shipping industry. Efforts to increase the strength of the connection are still underway. This study aims to determine the effect of the amount of indentation on shear strength on low carbon steel joints and the failure mode when the number of indents is different. The connection was made of low carbon steel with epoxy adhesive as adhesive and adhesive thickness of 0.3 mm. The number of indents varied; with and without indentations 4, 9, 16, and 25 respectively. The indentation process was made by using pillar drilling with 1.5 mm diameter of drill bit. From the results, the specimen without indentation had highest shear strength was about 22 MPa. Connection strength tended to decrease with increasing indentation. By finite element modeling, the distribution of shear stress tended to be uniform without indentation, and the stress at the end of the connection for indented connections was higher than without indentation. 
The effect cooling media in pack carburizing quenching on the corrosion resistance of ASTM A36 steel Sujita, S.; Padmiatmi, P.; Zainuri, A.; Sutanto, R.
Dinamika Teknik Mesin Vol 15, No 2 (2025): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v15i2.1099

Abstract

Rotary plow on hand tractor functions as a tool to plow the land efficiently in agricultural mechanization. This tool is made of ASTM A36 steel which functions to cut, chop, and turn the soil, thus improving the soil structure and preparing the land for planting. The disadvantages of ASTM A36 steel are low  impact toughness and corrosion resistance. In this study, ASTM A36 steel was pack carburizing quenching, with variations in cooling media in the form of water, coconut oil , and SAE 40 oil. The results of the studythe use of coconut oil as a cooling medium in the pack carburizing quenching process of ASTM A36 steel cause lower corrosion rates, slower cooling rates so that energy and impact toughness are higher compared to water as a cooling media So that coconut oil as a cooling media can be applied to the pack carburizing quenching rotary plow process to increase corrosion resistance.
Co-Authors Adhi, I.G.A.K.C. P.D. Setyawan, P.D. Padmiatmi, P. Pandiatmi, P. R.A. Saputra, R.A. Robiansyah, R. S. Salman, S. S. Sinarep, S. Sugiman . Sujita, Sujita Sulistyawati, E.D. Sulistyowati, E. D. Sutanto, R. Yudhyadi, I.G.N.K.