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ANALISIS KEKUATAN TARIK ALUMINIUM 5083 HASIL PENGELASAN GMAW POSISI 1G DENGAN VARIASI KUAT ARUS DAN DEBIT ALIRAN GAS PELINDUNG Wahyu Anjar Setyo Laksono; Solichin Solichin; Yoto Yoto
Teknologi dan Kejuruan: Jurnal Teknologi, Kejuruan, dan Pengajarannya Vol 40, No 1: Februari 2017
Publisher : Fakultas Teknik Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um031v40i12017p021

Abstract

Tujuan penelitian ini untuk mengetahui kekuatan tarik aluminium 5083 hasil pengelasan GMAW dengan pengelasan posisi 1G dengan variasi kuat arus dan debit aliran gas pelindung. Metode penelitian yang digunakan adalah penelitian eks-perimental dengan variasi kuat arus sebesar 90, 125, dan 160 A dan debit aliran gas pelindung sebesar 14 L/menit dan 16 L/menit. Pengujian kekuatan tarik sampel di-lakukan dengan standar uji ASTM E 8M-04. Hasil pengelasan menunjukkan variasi aliran gas pelindung mempengaruhi kekuatan tarik. Kekuatan tarik tertinggi dan te-rendah berturut-turut adalah 21,04 kg/mm2 dan 9,14 kg/mm2 yang diperoleh dari pe-ngelasan dengan arus 125A dan 90A dengan debit aliran gas pelindung 16 L/menit dan 14 L/menit. Bentuk patahan aluminium 5083 dengan pengelasan arus 90A dan aliran gas 14L/menit menunjukkan perpatahan getas.
Study on The Thermal Distortion, Hardness and Microstructure of St 37 Steel Plate Joined Using FCAW Maijuansyah Maijuansyah; Yanuar Rohmat Aji Pradana; Gaguk Jatisukamto; Solichin Solichin
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 3, No 1 (2019)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1033.162 KB) | DOI: 10.17977/um016v3i12019p018

Abstract

This study sets out to investigate the distortion angle, microstructure, and hardness of St 37 steel plate weld joint produced by FCAW using the welding current of 80, 110, and 140 A. By using flat position, CO2 and E71T-1 wire were utilized as a shielding gas and electrode filler, respectively. The distortion angle measurement was done on 3 different locations of the welded sample perpendicular to weld direction by using bevel protractor. The micro Vickers tests were then applied gradually at the cross-sectional surface with a distance of 0, 5, 10 and 15 mm from weld centreline using the load of 300 g for indentation time of 15 s. A series of microstructural observations were subsequently directed on cross-sectional weld joint regions including base metal, heat-affected zone (HAZ) and weld metal to investigate the microstructural transformation. From the results, it can be observed that increasing welding current can reduce the hardness at all indentation regions as well as inducing a higher level of thermal distortion occurred on a weld joint, especially at HAZ. The microstructural transformation was also observed at sample welded using various welding current. Both heat input and cooling rate subjected to the welded sample played an important role to characterize their properties.
Analisis Ergonomi Desain Meja Belajar Mengaji Dan Keluhan Muskuloskeletal Disorders Pada Santri Pondok Pesantren Anwarul Huda Kota Malang Tahun 2019 Adnan Ramadhan; Solichin Solichin; Tika Dwi Tama; Sendhi Tristanti Puspitasari
Preventia : The Indonesian Journal of Public Health Vol 7, No 1 (2022)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um044v7i12022p39-47

Abstract

The position of sitting not ergonomically forced like sitting cross-looking and sitting bent is one of the common causes of musculoskeletal disorders. This research was conducted to describe the ergonomic level design of studying learning tables used by the last step student of Anwarul Huda Islamic boarding school and the perceived complaint by showing which side of the table affects musculoskeletal disorders. The research method is descriptive with cross sectional design against 20 students of Islamic boarding school. The results obtained by the current diniyah table design are made by manufacturers who do not use anthropometric data in determining its size. Also found the most complaints for three consecutive days of data collection with the Nordic Body Map questionnaire which is on the skeletal part of the back, neck and buttocks. It was also found that none of the Islamic boarding school students were in the right sitting position, 30 percent of the sitting position was incorrect, 60 percent of the santri were in the wrong sitting position, and 10 percent of the santri in the sitting position were fatal. This can happen because in an ergonomic analysis using the mix match method the Islamic boarding school table design is all incompatible with the santri anthropometry, the Islamic boarding school table design is not ergonomic has a cause of the appearance of musculoskeletal disorders complaints by student Islamic boarding school.Sikap duduk tidak ergonomis yang dipaksakan, seperti duduk dengan bersila dan duduk dengan sikap membungkuk, merupakan salah satu penyebab umum gangguan muskuloskeletal. Penelitian ini dilakukan untuk menggambarkan tingkat ergonomis desain meja belajar mengaji yang digunakan oleh santri tingkat akhir PP. Anwarul Huda, Kota Malang dan keluhan yang dirasakan dengan menunjukan bagian meja mana yang mempengaruhi keluhan musculoskeletal disorder. Metode penelitian ini yaitu studi deskriptif dengan desain cross sectional kepada 20 santri. Hasil yang didapatkan desain meja belajar mengaji saat ini adalah buatan pabrikan yang tidak menggunakan data antropometri dalam menentukan ukuranya. Ditemukan juga keluhan terbanyak selama tiga kali pengambilan data dengan kuesioner Nordic Body Map yaitu pada bagian skeletal punggung, leher, tengkuk, dan pantat. Tidak ditemukan santri dalam posisi duduk yang benar, 30 persen posisi duduk yang kurang benar, 60 persen santri dalam posisi duduk yang salah, dan 10 persen santri dalam posisi duduk yang fatal. Hal tersebut dapat terjadi karena dalam analisis ergonomis menggunakan metode mix match desain meja belajar mengaji 100 persen tidak sesuai dengan antropometri santri, maka desain meja belajar mengaji tidak ergonomis penyebab munculnya keluhan muskuloskeletal disorders pada santri.