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All Journal Traksi : Majalah Ilmiah Teknik Mesin Jurnal Teknoin TEKNIK Rotasi Jurnal Ilmu Lingkungan JURNAL TEKNIK MESIN Media Mesin: Majalah Teknik Mesin Jurnal Rekayasa Mesin JMPM (Jurnal Material dan Proses Manufaktur) Journal of Energy, Mechanical, Material and Manufacturing Engineering Mesin Jurnal Metalurgi dan Material Indonesia JURNAL CRANKSHAFT Jurnal Teknik Mesin Indonesia Mekanika: Majalah Ilmiah Mekanika Jurnal Material Teknologi Proses: Warta Kemajuan Bidang Material Teknik Teknologi Proses Eksergi: Jurnal Teknik Energi SEMNASTERA (Seminar Nasional Teknologi dan Riset Terapan) Jurnal Profesi Insinyur Indonesia Jurnal Sosial Ekonomi Perikanan
Agus Suprihanto
Mechanical Engineering Departement Diponegoro University Semarang - Indonesia
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Transportation

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Evaluation The Effect Of HTGN Treatments On The Corrosion Resistance and Magnetic Properties Of Austenitic Stainless Steel 316L And 316LVM Suprihanto, Agus
Journal of Energy, Mechanical, Material and Manufacturing Engineering Vol 2, No 1 (2017)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (327.379 KB) | DOI: 10.22219/jemmme.v2i1.4898

Abstract

High temperature gas nitriding (HTGN) is the new methods to enhanced the properties of stainless steel. The HTGN process is able to diffuse the nitrogen atom into stainless steel. Increasing the nitrogen concentration produces higher corrosion resistance. Stainless steel for implant and medical devices such as 316L and 316LVM not only have to high corrosion resistance but also have to magnetic properties stabilities. Evaluation of corrosion and magnetic properties for austenitic stainless steel 316L and 316LVM after HTGN treatments was succesfully done. The corrosion resistance not only significantly increases but the stability of austenite phase is also increases. Therefore HTGN treatments is suitabe for improving the corrosion resistance for 316L and 316LVM which used as implant material.
PERBAIKAN SIFAT MEKANIS BESI COR KELABU DENGAN PENAMBAHAN UNSUR CROM DAN TEMBAGA Suprihanto, Agus; Umardani, Yusuf; Wibowo, Dwi Basuki
Media Mesin: Majalah Teknik Mesin Vol 6, No 1 (2005)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Sifat mekanis besi cor kelabu dipengaruhi oleh laju pendinginan, tebal coran,perlakuan panas, perlakuan saat cairan dan penambahan unsur paduan.Beberapa penggunaan material ini membutuhkan kekuatan yang tinggi. Untukmemperbaiki kekuatannya dapat dilakukan dengan penambahan unsur paduanyang bersifat penggalak karbida seperti Cr dan Cu.Dalam penelitian ini pengaruh penambahan Cr dan Cu pada sifat mekanis besicor kelagu telah diteliti. Material dasar FC20 yang ditambah dengan Cr Cr0,23 %, 0, 32% dan 0,47% serta Cu antara 0,6% to 0,7% telah diuji. Pengujianmetalografi dan tarik telah dilakukan untuk mengetahui pengaruh penambahanCr dan Cu terhadap sifat mekanis besi cor kelabu.Hasil pengujian tarik terlihat terdapat peningkatan kekuatan tarik sebesar 20%yaitu dari 191MPa menjadi 232MPa. Meskipun demikian hasil metalografimenunjukkan bahwa kesemua spesimen uji memiliki struktur mikro matrik perlitdengan grafit serpih tipe VII, distribusi A dan berukuran 3-5.
ANALISIS KEGAGALAN DRUM REM PRODUKSI UKM UNTUK TRUK/BUS DENGAN DAYA MESIN 190 HP Puja, IGN Wiratmaja; Suratman, Rochim; Suprihanto, Agus; Reza, Reza; Ako, Henry
Mesin Vol 17, No 2 (2002)
Publisher : Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (962.788 KB)

Abstract

Indonesian small and medium industries (UKM) have the ability to produce relatively cheap truck/bus brake drums, but the quality is needed to be improved. The drums usually fail in form of cracks or fractures before the design life is reached. This paper presents failure identification of the UKM’s brake drums that is including material aspects, operational loading, and stress analysis. The mechanical and physical properties of the materials are studied by conducting tensile test, hardness test, chemical composition, and metallography. Fractography is also conducted to study the type and process of the failures. The brake loads are analyzed for various operational conditions such as straight, curved, and downhill path, with various value of decceleration. Stress analysis of the drum due to the applied loads is conducted using finite element method. The complete analysis shows that the UKM’s drums are not strong enough for the applied braking load. It is also observed that the crack locations are in agreement with the highly computed stressed areas.
DISTRIBUSI TEGANGAN PADA PERCABANGAN PIPA 90O AKIBAT TEKANAN INTERNAL MENGGUNAKAN MEH Suprihanto, Agus; Satrijo, Djoeli; Basuki Wibowo, Dwi
TEKNIK Volume 28, Nomor 2, Tahun 2007
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (178.992 KB) | DOI: 10.14710/teknik.v28i2.2113

Abstract

Piping system is very important in many industries. Ones of crucial in design of piping system are todetermine the stress distribution around the branch. In this research, the distributed stress over 90o branchpiping system was evaluated with finite element method. Five models piping 90o branch which differentratio of diameter of pipe have been developed. The load applied on the models is internal pressure.The results indicate that around the branch there is stress distribution. The maximum stress is located atcenter of the branch but decrease significantly in the distance 30mm-45mm from it. Beyond the distance75mm from center, for diameter ratio 1, the model gives good agreement with experiment data
PENGUJIAN LELAH SIKLUS RENDAH BESI COR KELABU Suprihanto, Agus; Wibowo, Dwi Basuki; Satrijo, Djoeli
ROTASI Volume 12, Nomor 1, Januari 2010
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (150.652 KB) | DOI: 10.14710/rotasi.12.1.1-4

Abstract

Bus dan truk merupakan moda transportasi darat untuk penumpang dan barang yang terpenting. Kehandalan operasional bus/truk ditentukan oleh komponen-komponen pendukungnya misalnya tromol rem. Komponen ini dibuat dari besi cor kelabu. Pada saat pengereman, energi kinetik diserap menjadi panas lewat gesekan antara kanvas rem dengan tromol rem. Pola pengereman yang berbeda-beda, menyebabkan troml rem ini menerima beban dinamis. Penelitian ini ditujukan untuk mengetahui kekuatan lelah siklus rendah besi cor kelabu yang akan digunakan untuk tromol rem bus/truk.Pada penelitian ini besi cor kelabu FC200 dan 3 paduan besi cor kelabu FC200 dengan Cr (0,23%, 0,32% & 0,47% wt) dan Cu (0,6%-0,7%) dilakukan pengujian lelah siklus rendah. Dimensi spesimen uji mengacu pada standar ASTM E739. Sebanyak 60 spesimen berdiameter 8mm diuji pada lelah pada servo pulser dengan amplitudo regangan antara 0,15 s/d 0,5%. Spesimen dibuat dengan mesin CNC dengan tujuan meminimalkan efek proses pemesinan terhadap sifat mekanisnya.Data pengujian diolah menggunakan metoda yang diajukan oleh Downing (1983) and Fash (1982). Hasil pengujian menunjukkan bahwa koefisien kekuatan lelah (A) antara 2,336 –2,896 dan eksponen kekuatan lelah antara –0,251 to –0,266.
PERBAIKAN SIFAT MEKANIS BESI COR KELABU LEWAT PENAMBAHAN UNSUR Cr DAN Cu Suprihanto, Agus; Umardani, Yusuf
ROTASI Volume 8, Nomor 3, Juli 2006
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (352.288 KB) | DOI: 10.14710/rotasi.8.3.24-28

Abstract

Sifat mekanis besi cor kelabu dipengaruhi oleh laju pendinginan, tebal coran, perlakuan panas, perlakuan saat cairan dan penambahan unsur paduan. Beberapa penggunaan material ini membutuhkan kekuatan yang tinggi. Untuk memperbaiki kekuatannya dapat dilakukan dengan penambahan unsur paduan yang bersifat penggalak karbida seperti Cr dan Cu.Dalam penelitian ini pengaruh penambahan Cr dan Cu pada sifat mekanis besi cor kelagu telah diteliti. Material dasar FC20 yang ditambah dengan Cr Cr 0,23 %, 0, 32% dan 0,47% serta Cu antara 0,6% to 0,7% telah diuji. Pengujian metalografi dan tarik telah dilakukan untuk mengetahui pengaruh penambahan Cr dan Cu terhadap sifat mekanis besi cor kelabu.Hasil pengujian tarik terlihat terdapat peningkatan kekuatan tarik sebesar 20% yaitu dari 191MPa menjadi 232MPa. Meskipun demikian hasil metalografi menunjukkan bahwa kesemua spesimen uji memiliki struktur mikro matrik perlit dengan grafit serpih tipe VII, distribusi A dan berukuran 3-5.
Polarization Corrosion Test of Austenitic Stainless Steel 316L after High Temperature Gas Nitriding Suprihanto, Agus
ROTASI Vol 20, No 1 (2018): VOLUME 20, NOMOR 1, JANUARI 2018
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (370.119 KB) | DOI: 10.14710/rotasi.20.1.1-4

Abstract

Austenitic stainless steel 316L is ones of popular metallic biomaterial for implant due to the good mechanical properties and corrosion resistance. However at corrosion media, highly stressed and oxygen-depleted environment, it still susceptible to corrosion. Various methods have been developed to enhance the corrosion resistance of stainless steel such as high temperature gas nitriding. High temperature gas nitriding for 316L has been successfully done. This process is conducted at temperature 1050, 1100 and 1200oC for 15 and 30 minutes before quenching in the water. Polarization corrosion test showed that the corrosion resistance was significant improved for treatment at temperature 1050oC and holding time 15 minutes.
PEMBUATAN SPESIMEN UJI LELAH TIPE CONTINUOUS RADIUS MENGGUNAKAN MESIN BUBUT CNC Suprihanto, Agus; Wibowo, Dwi Basuki; Puja, IGN Wiratmaja
ROTASI Volume 8, Nomor 2, April 2006
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (190.449 KB) | DOI: 10.14710/rotasi.8.2.9-13

Abstract

Ones of considerations of design are fatigue failures. The fatigue failures are related with fatigue strength ofspecimens. The fatigue strength of materials usually resulted by fatigue testing. The results of the testing are influencedby some factors ie. machining process of specimens.The goal of this research is to give a proposed machining process of fatigue test specimens with CNC lathemachines. The proposed machining process can be eliminated the effects of machining from fatigue testing result.One examples of CNC lathe programming have been sucessfuly composed for fatigue test specimens typecontinuous radius. This specimen has 9,3mm minor diameter and 16mm major diameter. G and M code which used areG00, G~1, G02, M92, M99 and M30.
PENGARUH TEMPERATUR QUENCHING PADA PROSES AUSTEMPERING TERHADAP KEKUATAN LELAH AUSTEMPERING GREY IRON Suprihanto, Agus; Ilmi, Miftakhul
ROTASI Volume 9, Nomor 2, April 2007
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (309.35 KB) | DOI: 10.14710/rotasi.9.2.25-30

Abstract

Kegagalan lelah adalah hal yang sangat membahayakan karena terjadi tanpa petunjuk awal. Kelelahan mengakibatkan patah yang terlihat rapuh tanpa terjadi deformasi pada patahan. Untuk meningkatkan sifat-sifat mekanis besi cor kelabu juga dilakukan proses perlakuan panas. Dalam penelitian ini, proses perlakuan panas yang dilakukan adalah Austempering. Temperatur quenching pada proses austempering yang dilakukan yaitu : 350o, 400o, dan 500oC. Dari pengujian siklus tinggi yang dilakukan dengan mesin uji fatigue rotating bending terjadi kenaikan kekuatan lelah sebesar 8,5% dari 94 MPa untuk material tanpa austemper menjadi 102 MPa untuk material dengan austemper 350oC. Dari pengujian struktur mikro terlihat bentuk grafitnya serpih tipe VII dengan distribusi tipe A. Untuk struktur mikro yang telah dietsa nital 5% terlihat perubahan fasa matrik, dari perlit menjadi bainit, dan sedikit ferrit.
PROSES SEMISOLID FORMING Surojo, Eko; Suprihanto, Agus
ROTASI Volume 3, Nomor 2, April 2001
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1431.456 KB) | DOI: 10.14710/rotasi.3.2.12-20

Abstract

This paper presents a semisolid forming process as a new process that can replace conventional casting andforming process. Semisolid forming process is metal procesing in semisolid state. There are several advantages of thisprocess. The important of these is non-turbulent filling of the die. Non-turbulent die fill in the process can eliminate airentrapment encountered in the conventional die casting. The semisolid forming process also offers the near net shapecapabilities of die casting and produces parts with less shrinkage porosity and macrosegregation. The limitation ofsemisolid forming process is this process requires globular (non-dendritic) structure alloys for raw material process.
Co-Authors . Widayat Achmad Widodo Adriathma, Abduh Bayu Ako, Henry Al Azis, Bimasakti Sulthan Anak Agung Gede Sugianthara Andhika Krismaintya Putera Andika Pradifan Andrew Bryano Kermite, Andrew Bryano Basyith, Mohammad Rizqi Abdul Berlin, Rilo Budi Setyana Butarbutar, Martin Canggih Nugroho Catur Pramono Djoeli Satrijo Djoeli Satrijo Dwi Basuki Wibowo Dwi Basuki Wibowo Eko Surojo Eko Surojo Faisal Yusuf Tornado Gunawan Dwi Haryadi Hadiyanto Hadiyanto Hanif, Dimas Naufal Hanifa, Kana Harianto Harianto Henri Fatih Wibowo Ian Yulianti IGN Wiratmaja Puja Indrawan, Harry Ismoyo Haryanto Jericho Jericho Kamta Kamta Khoiri Rozi Khoiri Rozi Miftachul Munir Muhammad Fajar Purnama Muhammad Fakhri Aji Pratomo Nugraha, Ariyana Dwiputra Nur Aziyah Nur Cahyo Ojo Kurdi P Wahyudi Parven, Parven Paryanto, P Pratomo, Muhammad Fakhri Aji Purbonugroho, Hanindhieto Dias Andra R Rizal Isnanto Reza, Reza Rochim Suratman Sianipar, Daniel Siti Aisyah Soesanto, Indra Harfani Sukamta Sukamta Sulardjaka Sulardjaka Sulardjaka, S Sumardi . Susilo Adi Widyanto Sutopo, Farrel Rico Alifta Teguh Triyono Tomy Satya Waruwu, Kezia Gracelynn Wijaya, Elang Pramudya Yatim, Ardiyansyah Saad Yurianto Yurianto Yusuf Umardani Yusuf Umardhani