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All Journal Jurnal Ilmiah Teknologi dan Rekayasa INDONESIAN JOURNAL OF APPLIED PHYSICS Machine : Jurnal Teknik Mesin Journal of Applied Science and Advanced Engineering
Rudianto, Haris
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Astronomy Automotive Engineering Computer Science & IT Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics

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PENGARUH KOMPOSISI CU TERHADAP SIFAT MEKANIK DAN STUKTUR MIKRO DARI PENGECORAN AL-SI Anderson, Willy; Rudianto, Haris; Haryadi, Deni
Jurnal Ilmiah Teknologi dan Rekayasa Vol 23, No 2 (2018)
Publisher : Universitas Gunadarma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35760/tr.2018.v23i2.2464

Abstract

Aluminium (Al) merupakan logam ringan, mempunyai ketahanan korosi yang baik dan hantaran listrik yang baik dan sifat-sifat baik lainnya sebagai sifat logam, selain itu aluminium juga mempunyai sifat mampu membentuk (machinability). Tembaga (Cu) ditambahkan untuk meningkatkan kekuatan material tersebut, makin tinggi kadar tembaga maka makin banyak fasa yang terbentuk, sehingga kekerasan dan kekuatan paduan akan meningkat. Selain itu, peningkatan komposisi tembaga di dalam paduan Al-Si-Cu dapat juga meningkatkan sifat ketahanan korosi dan sifat ketahanan aus. Penelitian ini bertujuan untuk mengetahui pengaruh komposisi tembaga terhadap sifat mekanik dan struktur mikro dari pengecoran Al-Si. Hasil uji hardness rockwell menunjukkan bahwa semakin banyak unsur Cu yang ditambahkan pada paduan Al-Si maka semakin besar nilai kekerasan dan kekuatan paduan. Hasil pengujian impact charpy didapat nilai impact pada sampel 1 yaitu 0,0307 J/mm2 dan sampel 2 yaitu 0,0129 J/mm2. Hasil pengujian tensile kekuatan tarik sampel 1 yaitu 93.50  N/mm2, sampel 2 yaitu 39.39 N/mm2, dan  sampel 3 yaitu 33.60 N/mm2.
MOLECULAR DYNAMICS STUDIES ON THE STRENGTH PREDICTION OF INTERFACE BETWEEN AL-AL4C3 IN METAL MATRIX NANOCOMPOSITES Haryadi, Deni; Rudianto, Haris; Yamin, Mohamad
Jurnal Ilmiah Teknologi dan Rekayasa Vol 25, No 1 (2020)
Publisher : Universitas Gunadarma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35760/tr.2020.v25i1.2490

Abstract

In this study, molecular dynamics simulations (MD) will be applied to modelling the Al4C3-aluminum interface in aluminum nanocomposite, Al4C3 is an interface that results from the shaker mill process which becomes a bridge that plays an important role in Carbon particles with Aluminium Matrix and Based on observations from the TEM characterization, it is found that the relationship between Al orientation to Al4C3 is (111) (002) (220). The characteristics of the interface between Aluminum matrix and Al4C3 will be analyzed using uniaxial tension and shear test simulation. The atomic potential used in this simulation is the embedded atomic method (EAM) for Al, empirical-order intermolecular potential (AIREBO) for C and lennard jones for the reaction of Al-C atom. The result shows that, the interface orientation is Al matrix (002) || Al4C3 (003) has the highest interface strength compared to Al matrix (111) || Al4C3 (003) and Al matrix (200) Interface orientation || Al4C3 (003). Results from the molecular dynamics simulations are also discussed with analytical results obtained experimental
ANALISIS BEBAN STATIS PADA BINGKAI PANEL SURYA YANG DAPAT BERFUNGSI SEBAGAI PENGGANTI ATAP BANGUNAN Irawan, Rudi; Rudianto, Haris; Budiman
Machine : Jurnal Teknik Mesin Vol 11 No 2 (2025): Machine : Jurnal Teknik Mesin
Publisher : Jurusan Teknik Mesin Fakultas Sains dan Teknik Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/9hcvms42

Abstract

Pada saat ini, atap serta panel surya merupakan dua fungsi yang berbeda. Fungsi atap sebagai penutup bagian atas bangunan, serta fungsi panel surya sebagai pembangkit listrik. Adapun pada penelitian ini berfokus untuk menggabungkan dua fungsi pada masing-masing benda menjadi satu. Dengan merekayasa model bingkai pada panel surya. Sehingga, panel surya dapat digunakan sebagai atap bangunan dan sebagai pembangkit listrik. Analisis yang dilakukan berupa pembebanan statis, serta rubrik pemasangan. Analisis statis terdiri dari von misses stress, displacement dan safety factor pada bingkai panel surya. Yang menjadi pembeda dalam analisis statis ini yaitu pada material yang digunakan. Terdapat 4 jenis aluminium yang digunakan yaitu aluminium alloy 1350, aluminium alloy 2024, aluminium alloy 3003 dan aluminium alloy 6061. Dihasilkan perbedaan yang signifikan pada safety factor, dengan hasil aluminium alloy 1350 sebesar 2,02, aluminium alloy 2024 sebesar 5,57, aluminium alloy 3003 sebesar 3,03 dan aluminium alloy 6061 sebesar 4,04. Serta terdapat rubrik skala persepsi untuk mengetahui pandangan dalam kemudahan pemasangan bingkai panel surya.
Molecular Dynamics Studies of The Effects of Copper on The Mechanical Properties of Aluminum Rudianto, Haris; Haryadi, Deni
Journal of Applied Science and Advanced Engineering Vol. 2 No. 1 (2024): JASAE: March 2024
Publisher : Master Program in Mechanical Engineering, Gunadarma University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59097/jasae.v2i1.26

Abstract

In this research, molecular dynamics (MD) simulations were performed to model the effects of copper content on aluminum properties. Copper has a low solubility in aluminum. Therefore, the main purpose of this research is to study the influence of copper content (Cu) on the mechanical properties of aluminum. Modeling and simulation of nano indentation and uniaxial tension tests were carried out to observe the mechanical properties under the conditions of copper content starting from 0.5 up to 10wt% at 300oK. The interactions between the atoms of aluminum and copper were modeled using Embedded Atom Method (EAM) potentials. The calculation showed that a higher amount of copper increased the tensile strength of aluminum, and in this research,10wt% copper gave the highest tensile strength. But when it comes to the nano indentation test to determine hardness value, it showed that 1wt% copper gave the highest hardness, it assumes that this is related to localization of nano indentation test position optimum formation of intermetallic aluminum-copper, Al2Cu on a certain area.
Study of First Principles of Mg-Si Binary Systems as Precipitates from T6 Heat Treatment of AL-MG-SI ALLOYS Haryadi, Deni; Rudianto, Haris
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 10, No 01 (2020): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (690.64 KB) | DOI: 10.13057/ijap.v10i01.28912

Abstract

One of the purposes adding the two main alloying elements Si and Mg in small quantities (≈ 1%) on Aluminum is to form strengthening precipitates in aluminium alloy, which typically contribute with a fivefold strength increase from pure aluminum. In the last decades, the investigation has begun to understand the structure and formation of the different phases during heat treatment. An important precipitate in Al-Mg-Si Alloy is β" and β.  when the Precipitate β is created after β" is that the strength suddenly drops and the alloy is said to be overaged. By means of a first-principles supercell approach and density functional theory calculations, this research studied precipitate energy and interface energy of precipitate β" and β. Results show that precipitate β have precipitate energy higher then β" but have interface energy lowers then β". And each low energy interface was found possesses interface with the Al matrix is fully incoherent. The final result of calculation and simulation values for the interfacial energies, precipitate energies and strain energies that can be used in future predictions of the characteristic precipitate.
Co-Authors Budiman Haryadi, Deni Mohamad Yamin Rudi Irawan Willy Anderson, Willy