UJI FATIGUE TORSI PADA MATERIAL AA7075 YANG MENDAPATKAN PERLAKUAN PANAS T6

RIYADI, ASEF and Nukman, Nukman and Mataram, Agung (2024) UJI FATIGUE TORSI PADA MATERIAL AA7075 YANG MENDAPATKAN PERLAKUAN PANAS T6. Masters thesis, Sriwijaya University.

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Abstract

Fatigue testing is a material testing method that aims to evaluate how a material or structure reacts to cyclic loads or stress variations over time. The main goal of fatigue testing is to understand the behavior and resistance of materials to cyclic loads, which can cause the failure of materials or structures over long periods. Fatigue testing was carried out on AA 7075 material which has gone through a series of activities starting from turning the material according to ASTM in cylindrical shape, heating as solution treatment at a temperature of 475 0C for 5 hours, and then heating T6 artificial aging at a temperature of 120 0C for 4, 6 8 hours. The results of testing the NHT specimen at a load of 4 degrees, the material broke in cycle 14316 at a shear stress of 910.8 MPa. At a load of 5 degrees, the material broke in cycle 9316 at a shear stress of 1138.6 MPa, whereas at a load of 6 degrees, the material broke in cycle 6533 at a shear stress of 1366 MPa. The results of testing the HT specimen for 4 hours at a load of 4 degrees, the material broke in 18166 cycles at a shear stress of 894.1 MPa. At a load of 5 degrees, the material broke in cycle 15166 at a shear stress of 1117 MPa, whereas at a load of 6 degrees, the material broke in cycle 9863 at a shear stress of 1341 MPa. The results of testing the HT specimen for 6 hours at a load of 4 degrees, the material broke in 38683 cycles at a shear stress of 903 MPa. At a load of 5 degrees, the material broke in cycle 22850 at a shear stress of 1129 MPa, whereas at a load of 6 degrees, the material broke in cycle 17166 at a shear stress of 1355 MPa. The results of testing the HT specimen for 6 hours at a load of 4 degrees, the material broke at 78200 cycles at a shear stress of 1004 MPa. At a load of 5 degrees, the material broke in cycle 46250 at a shear stress of 1255 MPa, whereas at a load of 6 degrees, the material broke in cycle 29133 at a shear stress of 1506 MPa. From the test results, the greater the load applied, the faster the fracture will occur in the sample. This is by the S-N graphic pattern from Wahler which shows an exponential relationship. On the other hand, Mayer showed that the greater the stress, the faster the material's fracture.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Non Heat Treatment, Heat Treatment, Pengujian Fatik, Siklus, Regangan
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA401-492 Materials of engineering and construction. Mechanics of materials > TA401.A327 Materials science
Divisions:	03-Faculty of Engineering > 21101-Mechanical Engineering (S2)
Depositing User:	Asef Riyadi
Date Deposited:	07 Feb 2024 01:50
Last Modified:	07 Feb 2024 01:50
URI:	http://repository.unsri.ac.id/id/eprint/140315

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