Zaidan, Ilham and Dr. Eng. Yudy Surya Irawan, ST., M.Eng. and Moch. Syamsul Ma’arif, ST., MT. (2021) Pengaruh RPM Pengelasan Terhadap Fatigue Crack Growth Rate pada A6061 One-Sided Chamfer Friction Weld Joints. UNSPECIFIED thesis, Universitas Brawijaya.
Abstract
Aluminium merupakan salah satu logam yang masih sering digunakan dalam proses manufaktur dikarenakan aluminium mudah dibentuk, tahan korosi, dan memiliki densitas yang rendah. Las gesek merupakan salah satu metode pengelasan yang cocok untuk Aluminium yang mempunyai konduktivitas termal yang tinggi. Menimbang fatigue merupakan fenomena kegagalan yang sering terjadi pada material terutama pada bagian sambungan, dilakukanya penelitian ini untuk meneliti tentang laju perambatan retak pada hasil las gesek Continous Drive Friction Welding (CDFW) aluminium seri 6061. Penelitian ini dilakukan untuk mendapatkan parameter optimum baik dari geometri maupun proses manufaktur untuk mendapatkan kualitas pengelasan terbaik. Parameter yang digunakan dalam penelitian ini adalah variasi sudut chamfer 0O dan 30O satu sisi diam dengan kecepatan putaran spindle 800 rpm, 1120 rpm, dan 1600 rpm pada salah satu benda kerja las gesek kemudian diberikan gaya tekan awal 7 kN hingga mencapai burn of length 3 mm dan upset force 21 kN selama 60 detik. Kemudian spesimen didesain menjadi spesimen uji lelah sesuai dengan standar ASTM. Spesimen diuji dengan mesin cantilever rotary bending fatigue test dengan rotasi 1400 rpm. Hasil pengujian ini adalah nilai konstanta laju perambatan retak lelah variasi sudut chamfer 0O rpm 800 konstanta C = 5,08E-08 mm/siklus (MPa√m)m dan m = 2.091 ; variasi sudut chamfer 0O rpm 1120 konstanta C = 2,05E-08 mm/siklus (MPa√m)m dan m = 2.253 ; variasi sudut chamfer 0O rpm 1600 konstanta C = 1,45E-09 mm/siklus (MPa√m)m dan m = 2.983 ; variasi sudut chamfer 30O 800 rpm konstanta C = 7,37E-10 mm/siklus (MPa√m)m dan m = 3.216 ; variasi sudut chamfer 30O 1120 rpm konstanta C = 3,81E-10 mm/siklus (MPa√m)m dan m = 3.342 ; dan variasi sudut chamfer 30O 1600 rpm konstanta C = 7,27E-11 mm/siklus (MPa√m)m dan m = 3.682. Nilai di atas menunjukan bahwa variasi sudut chamfer 30O 1600 rpm memiliki konstanta laju perambatan retak lelah yang paling lambat, sekaligus menunjukan ketahanan yang paling tinggi terhadap perambatan retak lelah.
English Abstract
Aluminum is one of the metals that still often used in the manufacturing process because aluminum is easy to form, has a good corrosion resistance, and low density. Friction welding is a method that is suitable for Aluminum which has high thermal conductivity. Considering that fatigue is a failure phenomenon that often occurs in materials, especially in the joint part, this study was conducted to examine the rate of crack propagation in the Continuous Drive Friction Welding (CDFW) aluminum series 6061. This research was conducted to obtain optimal parameters both from the geometry and the manufacturing process to get the best quality of welding result. The parameters used in this study are 0o and 30o chamfer angles on one side at the stationary specimen with a spindle rotation speed of 800 rpm, 1120 rpm, and 1600 rpm on the rotating ones. The stationary specimen was given an initial compressive force of 7 kN until it reaches a burn of length 3 mm and upset force of 21 kN for 60 seconds. Then the specimens were processed into fatigue test specimens according to ASTM standards. The specimens were tested with a cantilever rotary bending fatigue test machine with a rotation of 1400 rpm. The results of this test are the constant value of fatigue crack propagation rate variation of chamfer angle 0o 800 rpm constant C = 5,08E-08 mm/cycle (MPa√m)m and m = 2.091; variation of chamfer angle 0o 1120 rpm constant C = 2,05E-08 mm/cycle (MPa√m)m and m = 2.253; variation of chamfer angle 0o 1600 rpm constant C = 1,45E-09 mm/cycle (MPa√m)m and m = 2.983; variation of chamfer angle 30o 800 rpm constant C = 7,37E-10 mm/cycle (MPa√m)m and m = 3.216; variation of chamfer angle 30o 1120 rpm constant C = 3,81E-10 mm/cycle (MPa√m)m and m = 3.342; and the variation of the chamfer angle 30O 1600 rpm constant C = 7,27E-11 mm/sikus (MPa√m)m dan m = 3.682. All of those value above shows that fatigue crack propagation rate of 0O chamfer angle with 1600 rpm spindle speed, was found to be the slowest rate rather than any other variation. Which also shows that this variation has a better durability to fatigue crack growth.
Other obstract
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| Item Type: | Thesis (UNSPECIFIED) |
|---|---|
| Identification Number: | 0521070276 |
| Uncontrolled Keywords: | Kata Kunci: Aluminium 6061; Sudut Chamfer; Laju Perambatan Retak Lelah; Konstanta Paris |
| Subjects: | 600 Technology (Applied sciences) > 621 Applied physics > 621.8 Machine engineering |
| Divisions: | Fakultas Teknik > Teknik Mesin |
| Depositing User: | yulia Chasanah |
| Date Deposited: | 18 Feb 2022 02:58 |
| Last Modified: | 25 Sep 2024 03:14 |
| URI: | http://repository.ub.ac.id/id/eprint/189821 |
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