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All Journal Journal of Mechanical Science and Engineering Jurnal Rekayasa Mesin Jurnal Energi Dan Manufaktur Jurnal Pelita Sriwijaya
Diah Kusuma Pratiwi
Jurusan Teknik Mesin Universitas Sriwijaya
Aerospace Engineering Humanities Automotive Engineering Control & Systems Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Other

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Journal : Journal of Mechanical Science and Engineering

 1 
Mechanical Behavior of Medium Carbon Steel welded with SMAW And Corroded with Sea Water Diah Kusuma Pratiwi; Rasyidi Rasyidi
Journal of Mechanical Science and Engineering Vol 2, No 1 (2015): Journal of Mechanical Science and Engineering
Publisher : Universitas Sriwijaya

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Abstract

The problem of  metal corrosion is a very serious to be observed, especially the corrosion of medium carbon steel because it can reduce the economic value of the metal. Corrosion of carbon steel is influenced by the environmental conditions. This paper discusses the effect of the corrosion rate of medium carbon steel with SMAW welding and corrodes it with sea water during several hour. Electrodes of AWS A5.1E7016 type were used in the welding. The test results show that the medium carbon steel which was corroded with sea water has small weight loss. It seem that the weight loss has small influence on the mechanical behavior of the metal. For the welded medium carbon steel, the ultimate strength and surface hardness are smaller than the un-welded one. The microstructure of welded medium carbon steel has unsimilar structure with un-welded steel because it has about the same amount of ferlite, ferrite and martensite.
The Influence of Matrix Banana Stem Fiber Volume Fraction Recycled Polypropylene (RPP) toward Bending Test Diah Pratiwi Kusuma; Hendri Chandra; Tumpal Ojahan Rajagukguk
Journal of Mechanical Science and Engineering Vol 1, No 1 (2013): Journal of Mechanical Science and Engineering
Publisher : Universitas Sriwijaya

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Abstract

ABSTRAKSerat alam telah terbukti sebagai material yang kuat, mampu untuk menggantikan serat sintetik sebagai penguat. Serat batang pisang kepok yang memiliki kekuatan tarik 68,44 MPa dengan bundalan rata-rata 0,698 mm salah satu serat yang memiliki potensi sebagai penguat untuk polymer material komposit. Pada material komposit bermatriks recycled polypropylene (RPP) berpenguat serat batang pisang kepok dapat menahan beban yang diterima material komposit. Sedangkan recycled polypropylene (RPP) sebagai pengikat serat batang pisang, bekerja menahan beban dan melindungi serat dari kerusakan.  Hasil pengujian yang paling optimal terdapat pada volume fraksi 35% fiber : 65% matriks dengan  tegangan bending 122,09 N/mm2, modulus elastisitas 2975 MPa, momen bending 126,59 N/mm2 dan tegangan lentur 64,34 MPa. Pada pengamatan SEM fraksi volume 35% filler : 65% matriks paling optimal karena adanya ikatan matriks dan serat menyatu dengan sempurna. Dari penelitian ini dapat disimpulkan bahwa pengaruh fraksi volume serat batang pisang kepok sebagai penguat (fiber) dan recycled polypropylene (RPP) sebagai pengikat (matriks) pada material komposit akan mempengaruhi kekuatan material komposit lebih kuat dan getas. Apabila ditinjau dari keseluruhan pengujian yang dilakukan maka fraksi volume yang paling optimal terdapat pada fraksi volume 35% filler : 65% matriks.
The Effect Of Sinking Parameters To Optimize Response At Edm Of Aisi H13 Using Taguchi – Fuzzy Method Diah Kusuma Pratiwi
Journal of Mechanical Science and Engineering Vol 4, No 1 (2017): Journal of Mechanical Science and Engineering
Publisher : Universitas Sriwijaya

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Abstract

The development technology in today's manufacturing is very fast, the desire of the market will need products and components with complex shapes and a high level of accuracy as well as hardness material which has high strength. High degree of hardness and precision widely used non-conventional sinking of EDM. End cutting depth (CDE), the maximum rate of erosion material(REM) and rate of electrode wear (RWE) as well as minimal surface roughness (SR) is the performance of the process of machine sinking EDM to be achieved. Aims of a study conducted to determine the contribution of the process parameters in order to reduce the variation of response parameters simultaneously and determine the value of setting the appropriate parameter process. The parameters were varied current, on time, off time and machining voltage. This research used experimental design of Taguchi method with orthogonal matrix L16 44. Combination of Taguchi-Fuzzy is used as a method of optimization by experimenting as much as two times. Optimization results show the contribution of each parameter on all responses simultaneously is current at 41.35%, energy on time amounted to 37.90%, off time amounting to 10,11%and machining voltage by 5%. End cutting depth (CDE) with a specific target, the maximum rate of erosion material (REM), ), the rate of wear of the electrode (RWE) and the surface roughness (SR) are both derived parameter value of at least current, 15A the energy on time 300ìs, off time 5ìs and machining voltage of 12V.
Effect of Cooling Water Fraction Of Salt in Low Carbon Steel Properties Ahmadin Ahmadin; Diah kusuma pratiwi
Journal of Mechanical Science and Engineering Vol 2, No 1 (2015): Journal of Mechanical Science and Engineering
Publisher : Universitas Sriwijaya

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Abstract

Low carbon steel plate is widely used in the field of construction that require high hardness and ductility . One method used to increase the hardness of the low carbon steel plate that is by quenching water plus salt . The results showed that the quenching is based on a study of 10% salt water has a hardness of 168 VHN with σu = 33.62 , ε = 12 % and the lowest is 15 % salt water quenching VHN 101 σu = 30.30 and ε = 7.30% composition of the study above was 10 % salt solution in the cooling water will cause a decrease in mechanical properties .
Co-Authors abraham hutabarat Ahmadin Ahmadin Amir Arifin Astuti - Dewi Puspitasari Eka Utami, Nurhabibah Paramitha Ellyanie Ellyanie Gunawan Gunawan Gustini, Gustini Hendri Chandra Kaprawi Kaprawi Marwani Marwani, Marwani Muhammad Surya Netrane Jagad Jagad Nurhabibah Paramitha Eka Utami Nurhabibah Paramitha Eka Utami Prakoso, Akbar Teguh Rasyidi Rasyidi Riman Sipahutar Saputra, M. A. Ade Tumpal Ojahan Rajagukguk Utama Putra, Risky Utami, Nurhabibah Paramitha Eka