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All Journal Journal of Mechanical Engineering Science and Technology Jurnal Material Teknologi Proses: Warta Kemajuan Bidang Material Teknik Teknologi Proses Proceeding ISETH (International Summit on Science, Technology, and Humanity)
Setiawan, Widia
Departemen Teknik Mesin, Sekolah Vokasi, Universitas Gadjah Mada.
Computer Science & IT Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Social Sciences Other

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New Design of Aluminum 6061 Welding Joining Using Friction Stir Welding Method Widia Setiawan; Nugroho Santoso; Surojo Surojo
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 4, No 2 (2020)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um016v4i22020p135

Abstract

Parallel, lap, corner, and T joints are commonly used in fusion welding and solid welding. Other joints made are lap and butt joint. This study aims to evaluate a new design of fitting model single U and double U for friction stirr welding of Aluminum. Aluminum sheet 6061with a thickness of 10 mm, will be cut to a length of 150 mm and a width of 100 mm, then a locking groove will be made with an inner size of 5 mm and a length of 150 mm The flow is used to be paired in the FSW process. This experiment results show the high tensile strength that occurs in the double joint u, is 13.4 kN while the average is 12 kN. Single connection experiment u the highest tensile strength is 12.89 kN, while the average value is 10.37 kN. The hardness is higher in double u joints compared to single u joints.
Variasi Perubahan Putaran Pada Pengecoran Aluminium Bentuk Puli Dengan Metode Centrifugal Casting Terhadap Peningkatan Kekuatan Mekanik Nugroho Santoso; Widia Setiawan
Jurnal Material Teknologi Proses: Warta Kemajuan Bidang Material Teknik Teknologi Proses Vol 1, No 1 (2015)
Publisher : Departemen Teknik Mesin, Sekolah Vokasi, Universitas Gadjah Mada.

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (58.26 KB) | DOI: 10.22146/jmtp.v1i1.12254

Abstract

Aluminium bekas adalah bahan baku coran yang sering digunakan pada industri coran di wilayah Yogyakarta untuk memproduksi komponen kendaraan bentuk pelek. Permasalahan yang sering dihadapi pengrajin coran aluminium yang menggunakan cetakan logam adalah sering terjadinya cacat coran dan kualitas coran yang kurang baik. Penelitian difokuskan pada pengaruh gaya sentrifugal pada pengecoran metode centrifugal casting bertujuan meningkatan kualitas material hasil coran. Tahapan proses penelitian adalah memotong material, melebur pada temperatur 750 oC, pengaturan putaran cetakan 0, 263, 700 rpm, temperatur cetakan 200 oC penuangan dan pembongkaran hasil. Dari hasil pengamatan dan analisa pengujian diketahui bahwa pada putaran 280, 700 rpm dapat mencegah cacat penyusutan luar dan peningkatan kekuatan. Nilai kekerasannya meningkat dari 66,15, 67,15, 71,8 BHN, kekuatan tariknya meningkat dari 127,68, 139,70 hingga 147,95 MPa serta nilai densitasnya juga meningkat 2,58, 2,63 hingga 2,7 gr/cm3.
Pengaruh heat treatment material tie rod pada temperatur 1000 °C terhadap struktur mikro, kekerasan dan keausan Firman Firdhaus; Widia Setiawan
Jurnal Material Teknologi Proses: Warta Kemajuan Bidang Material Teknik Teknologi Proses Vol 2, No 2 (2021): Jurnal Material dan Teknologi Proses Volume 2 Nomor 2 Tahun 2021
Publisher : Departemen Teknik Mesin, Sekolah Vokasi, Universitas Gadjah Mada.

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (351.855 KB) | DOI: 10.22146/jmtp.63641

Abstract

Tie rod adalah salah satu komponen dari actuator coal pulverizer dengan fungsi sebagai penahan naik turunnya grinding roller pada saat proses penggilingan didalam coal pulverizer. PT PJB UBJ O&M PLTU Tanjung Awar-Awar sebagai perusahaan pembangkit listrik tenaga uap mengalami kendala seperti kebocoran coal pulverizer, breakdown coal pulverizer dan kebakaran akibat semburan batu bara. Salah satu penyebab utama dari masalah tersebut adalah tie rod pada coal pulverizer mengalami patah dan aus. Penelitian ini bertujuan untuk mendapatkan nilai kekerasan dan keausan yang optimal dengan memakai perlakuan panas. Penelitian ini membahas tentang pengaruh variasi perlakuan panas terhadap struktur mikro, nilai kekerasan dan nilai keausan pada baja AISI S5 Steel. Penelitian ini dilakukan perlakuan panas pada temperature austenite 10000C dengan waktu penahanan 24 menit yang kemudian diberi variasi pendinginan yaitu quenching, annealing dan quench tepering menggunakan temperature 2000C dengan penahanan 48 menit. Hasil dari perlakuan panas tersebut dianalisa struktur mikro, uji kekerasan dan uji keausan. Hasil penelitian ini menunjukkan bahwa material tie rod adalah baja perkakas AISI S5 Steel. Struktur mikro yang terbentuk pada spesimen raw material dan annealing adalah ferite dan perlite. Fasa ferrite dan martensite terbentuk pada material quenching dan quench tempering. Nilai kekerasan Proses heat treatment yang menghasilkan sifat yang optimal pada material tie rod adalah quench tempering, hal ini dikarenaka nilai kekerasannya meningkat menjadi 503,22 VHN, memiliki nilai keausan sebesar 0,832803 x 10-4 mm3/kg.m dan material quench tempering memiliki sifat ulet dan tangguh. Kata Kunci: AISI S5 Steel, Tie rod, Perlakuan panas, Uji kekerasan, Uji keausan
Lap Joint Carbon Steel ST 37 and Aluminum 6061 with Friction Stir Welding (FSW) Widia Setiawan; Djarot B. Darmadi; Wahyono Suprapto; Rudy Soenoko
Proceeding ISETH (International Summit on Science, Technology, and Humanity) 2016: Proceeding ISETH (International Conference on Science, Technology, and Humanity)
Publisher : Universitas Muhammadiyah Surakarta

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

Abstract

In this research, Aluminum 6061 and Carbon steel ST 37 sheet were lap joined by friction stir welding. A hardened medium carbonese steel (EMS 45) was used as rotary Probe. The microstructures of the joining inter-metallic compounds were observed by scanning electron microscopy, microstructure photograph, and micro-hardness tests. The joint strength was evaluated by shear stress tests. The experiment was performed with varied length of pin probe 6, 7, and 8 mm, equal rotational speed of 2500 rpm, and welding speed (15 mm/minutes). The Inter-metallic compounds of aluminums sheet was cut off the pin probe and the mixture on the Carbon steel ST 37. Intermetallic compounds were analyzed on its micro sructure in this region aluminum and carbon steel mixed, the value joint tensile shear 6.2KN.
Lap Joint on St.37 Steel Plate with Friction Welding Clamping Method Widia Setiawan; Nugroho Santoso; Wiyadi Wiyadi; Muhammad Sulistiyo Aji; Rachmat Alamin; Achsan Tarmudi
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 7, No 1 (2023)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um016v7i12023p047

Abstract

Friction stir (FW) welding is a relatively fresh method that was created and has been continually refined and adapted to industrial applications due to its benefits. This approach for solid-state joining entails connecting the components at a temperature below their melting point and then heating them up. Clamp joint applications are widely used using external heating and hitting with high strength, but the clamped joints with the FW method are rarely done. The research studied the characteristic of clamped joints at various plate thicknesses using the FW method. In this study, 30 specimens were used in the form of a St.37 low carbon steel plate with a size of 50 mm x 100 mm and a thickness of 3 mm, 5 mm, and 9 mm, and several holes were made with a diameter of 5 mm. The plate was connected by 2 clamps, and 4 clamps then the FW method was conducted in a milling machine. The results indicate that the plates were connected well. The highest hardness value was 256.4 VHN on the FW of 9 mm plate. The microstructure is dominated by ferrite and a little pearlite phase. The largest shear force is 66.54 kN obtained at 4 clamps with a plate thickness of 9 mm, and the lowest is 13.46 kN, obtained at 2 clamps with a plate thickness of 3 mm.
Co-Authors Achsan Tarmudi Djarot B. Darmadi Firman Firdhaus Laksono Trisnantoro Muhammad Sulistiyo Aji Nugroho Santoso Nugroho Santoso Nugroho Santoso Rachmat Alamin Rudy Soenoko Wahyono Suprapto Wiyadi Wiyadi