title: Evaluasi Sifat Fatik Siklus Rendah (Low Cycle Fatigue)  Aluminium 6061–T6 Pada Temperatur 100°C, 200°C dan    300°C
creator: FADDEL RAKA PRATAMA, 1415021042
subject: 620 Ilmu teknik dan ilmu yang berkaitan
description: Paduan aluminium 6061-T6 banyak diaplikasikan pada komponen otomotif dan  pesawat terbang, yang umumnya selama bahan diaplikasikan sering mengalami  deformasi plastis dan bahan mengalami kegagalan fatik dalam beberapa siklus  pembebanan. Pengujian tarik (ASTM E8) fatik siklus rendah (ASTM E606) pada  kondisi temperatur ruang dan pada kondisi temperatur 100°C, 200°C dan 300°C  dengan amplitudo 0.004mm/mm-0.006mm/mm dan laju regangan konstan 0.005/s  dilakukan. Data hasil pengujian tarik dan fatik pada setiap kondisi temperatur  berbeda diperoleh dan dibandingkan untuk mengamati respon ketergantungan sifat  mekanik dan fatik terhadap temperatur. Data-data hasil pengujian fatik dievaluasi  menggunakan pendekatan Coffin-Manson-Basquin, yang dapat digunakan untuk  memprediksi umur fatik paduan dalam kondisi pembebanan elastis (metode  Basquin) dan plastis (metode Coffin-Mason) dalm kondisi temperatur yang  bervariasi. Perilaku pelunakan dan pengerasan regangan yang dialami bahan  dipelajari melalui kurva tegangan-jumlah siklus pada amplitudo regangan yang  diamati. Pengamatan mikrostruktur melalui mikroskop optik menunjukkan bahwa  perilaku paduan dapat dikaitkan dengan penuaan regangan dinamik (dynamic strain  aging/DSA) yang diperngaruhi langsung oleh amplitudo dan temperatur pengujian.  Kata kunci: Al 6061-T6, fatik siklus rendah, Coffin-Manson-Baquin, pelunakan  dan pengerasan, penuaan regangan dinamik  An aluminum 6061-T6 alloy is widely applied for an automotive and aircraft  components, where the components of material generally suffers high loading  cycles and leads to fatigue failure in few cycles. Tension tests according ASTM E8  were performed under displacement control at speed rate of 0.2 mm/mm and low  cycle fatigue tests according to ASTM E606 were performed under strain control  with various strain amplitude of 0.004-0.006 mm/mm at a constant strain rate of  0.005/s. Both testing were conditioned in room temperature and various  temperature of 100°C, 200°C and 300°C. Data from tensile and fatigue test results  at each different temperature are obtained and compared to investigate the alloy’s  response to the deterioration of mechanical properties and fatigue properties with    the temperatures. The fatigue test data were evaluated using the Coffin-Manson-  Basquin approach for predicting the fatigue life of alloy under the elastic loading    region (Basquin method) and the plastic loading region (Coffin-Manson method) in  varying temperatures. Cyclic softening and hardening behavior occurred by the  alloy were studied through a stress response with a number of cycles on the strain  amplitude observed. Microstructures observation by optical microscope shows that  the behavior of alloys can be attributed to dynamic strain aging (DSA) effect,  which is directly affected by strain amplitude and testing temperature.    .  Keywords: Al 6061-T6, Low cycle fatigue properties, Coffin-Manson-Basquin,  Strain hardening, Dynamic strain aging.
publisher: FAKULTAS TEKNIK
date: 2019
type: Skripsi
type: NonPeerReviewed
format: text
identifier: http://digilib.unila.ac.id/57223/1/ABSTRAK.pdf
format: text
identifier: http://digilib.unila.ac.id/57223/2/SKRIPSI%20FULL.pdf
format: text
identifier: http://digilib.unila.ac.id/57223/3/SKRIPSI%20TANPA%20BAB%20PEMBAHASAN.pdf
identifier:   FADDEL RAKA PRATAMA, 1415021042  (2019) Evaluasi Sifat Fatik Siklus Rendah (Low Cycle Fatigue) Aluminium 6061–T6 Pada Temperatur 100°C, 200°C dan 300°C.  FAKULTAS TEKNIK, UNIVERSITAS LAMPUNG.     
relation: http://digilib.unila.ac.id/57223/