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All Journal ROTOR: JURNAL ILMIAH TEKNIK MESIN Conference SENATIK STT Adisutjipto Yogyakarta Prosiding Seminar Nasional Unimus
Bambang Hari Priyambodo
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Aerospace Engineering Humanities Automotive Engineering Computer Science & IT Electrical & Electronics Engineering Energy Engineering Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Nursing Public Health

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PENGARUH VARIASI WAKTU SHOT PEENING TERHADAP STRUKTUR MIKRO DAN KEKERASAN PERMUKAAN PADA MATERIAL IMPLAN AISI 304 Trio Nur Wibowo; Priyo Tri Iswanto; Bambang Hari Priyambodo; Nur Amin
ROTOR 2016: ROTOR Special Edition
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

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Abstract

AISI 304 stainless steel is a type of implant material with a relatively low cost. However, its mechanical properties need to be improved so it can compensate the AISI 316L and titanium alloy materials. Fatigue characteristic is also one of the important criteria that must be evaluated in order to achieve overall service performance when the material is under dynamic loads. The hardness surface and the nano-structures formation can delay the propagation of fatigue crack initiation and can reduce the corrosion rate. This study is conducted to determine the changes in microstructure and hardness of AISI 304 for shot peening process. The surface treatment by shot peening process is performed by setting the variation of the shooting time of 0, 5, 10, 20, 30 and 40 minutes at a shooting pressure of 7 bar using the Steel Shot diameter of 0.6 mm with a hardness of 40-50 HRC. The distance between the nozzle and the specimen surface is set at 100 mm. The microstructure is analyzed by optical microscope with a magnification of 100 times and photographed using optilab, which is connected to a computer. Surface hardness is tested using a Micro Vickers with indentation load of 10 grams for 10 seconds. The results show that refined microstructure layer is formed in the shot peening surface and the hardness is also increased gradually as well as shot peening time of 0, 5, 10, 20, 30 and 40 minutes. This also increase the hardness number of 241, 404, 418, 437, 481 and 496 VHN. To sum up, the shot peening can be used to refine the grain and to increase the hardness. Keywords: AISI 304, shot peening, microstructure, Vickers hardness
PENGARUH DURASI SHOT PEENING TERHADAP STRUKTUR MIKRO DAN KEKERASAN PERMUKAAN PADA AISI 316L Rizqi Ilmal Yaqin; Priyo Tri Iswanto; Bambang Hari Priyambodo; Erich Umbu Kondi M
SENATIK STT Adisutjipto Vol 3 (2017): Dukungan Teknologi Untuk Pengembangan Industri Dirgantara Indonesia
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/senatik.v3i0.120

Abstract

Stainless steel 316L is widely used in medical applications. AISI 316L has good mechanical properties, good corrosion resistance and easy fabrication. On the other hand, 316L should be upgraded its surface mechanical properties for implantable materials. One of the treatment used is shot peening. shot peening can increase surface hardness in the presence of micro structure changes. These changes are due to plastic deformation and residual stress. This study discusses the effect of shooting time duration of 2, 4, 10, 20, and 30 against the micro structure and surface hardness. The steel balls used are 0.6mm in diameter and 40-50 HRC hardness with 8 bar pressure during shooting. the results of surface hardness on the duration of 2, 4, 10, 20, and 30 minutes obtained respectively are 296.7 HV, 380.8 HV, 425.8 HV, 445.0 HV, 504.9 HV and 523.1 HV. The surface hardness is increased due to structural changes on the surface and sub-surface of the shot peening material. The result of micro structure obtained is that with increasing duration of shot peening and the increasing of hardness value of surface hence grain size at sub surface that is smaller after treatment. Shot peening caused hardness of material 316L stainless steel and made grain of microstructure sub layer.
Mesin Pencacah Singkong Sebagai Pakan Ternak Sapi Untuk Peningkatan Kesejahteraan UKM Sido Mulyo di Kabupaten Karanganyar Niki Agastia Mutaqin; - Margono; Bambang Hari Priyambodo; Muhammad Vendy Hermawan
Prosiding Seminar Nasional Unimus Vol 3 (2020): Optimalisasi Hasil Penelitian dan Pengabdian Masyarakat Menuju Kemandirian di Tengah P
Publisher : Universitas Muhammadiyah Semarang

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Abstract

Singkong tidak hanya dikonsumsi sebagai bahan pangan sumber karbohidrat, singkong juga dapat digunakan sebagai bahan pakan ternak, yaitu sebagai sumber energi dan protein, bila ubi diproses lebih lanjut maka akan menghasilkan limbah berupa kulit singkong dan onggok. Dengan kandungan karbohidratnya yang tinggi, sehingga dapat digunakansebagai sumber energi bagi ternak sapi dan kandungan asam amino cukup baik untuk ternak sapi pada masa pertumbuhan. Tingkat produksi pakan di tentukan oleh nilai gizi dan harga pakan itu sendiri. Semakin tercukupi kebutuhan nutrisi pakan maka tingkat produksi unggas akan semakin tinggi.  Salah satu proses pengolahan singkong menjadi pakan ternak adalah dengan mengiris. Selama ini orang - orang masih melakukan pengirisan singkong dengan alat manual menggunakan pisau. Sehingga apabila singkong dalam jumlah yang cukup banyak maka dibutuhkan waktu dan tenaga yang lebih banyak. Tujuan dilaksanakannya pengabdian masyarakat dengan menciptakan mesin tepat guna untuk mengganti peran manusia dalam proses pencacah singkong dengan menggunakan mesin Pencacah.Mesin ini diharapkan mampu meningkatkan efektifitas dan efisiensi produksi pakan ternak. Hasil program menunjukkan bahwa rata-rata kapasitas produksi mengalami peningkatan sebesar 333% dari 300 kg / jam menjadi 1000 kg / jam. Penggunaan mesin baru tetap bisa menjaga kualitas gizi dan protein pada singkong. Singkatnya, program pengabdian masyarakat telah memberikan perubahan positif bagi peternak sapi di kawasan karanganyar. Kata Kunci : Mesin Pencacah. Singkong, Efisiensi
Co-Authors - Margono Erich U. K. Maliwemu Muhammad Vendy hermawan Niki Agastia Mutaqin Nur Amin Priyo Tri Iswanto Rizqi Ilmal Yaqin Trio Nur Wibowo