UJI BENDING PATAH LELAH PADA AA7075 YANG MENDAPATKAN PERLAKUAN PANAS T6

WIJAYA, ADRYAN and Nukman, Nukman (2023) UJI BENDING PATAH LELAH PADA AA7075 YANG MENDAPATKAN PERLAKUAN PANAS T6. Masters thesis, Universitas Sriwijaya.

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Abstract

Fatigue testing or fatigue testing is a method of material testing that aims to evaluate how a material or structure reacts to cyclic loads or stress variations over time. The main purpose of fatigue testing is to understand the behavior and resistance of materials to cyclic loads, which can lead to material or structural failure over long periods. Fatigue testing is carried out on AA7075 material which has gone through a series of activities ranging from material crushing according to JIS Z 2273 standards, heating (solution treatment) at a temperature of 475 °C for 5 hours to heating T6 articial aging (aging) at a temperature of 120 °C for 4.6 8 hours. The test result of the NHT specimen at a load of 4 degrees of the material broke at cycle 17083 at a shear stress of 0.2208 N/mm2. At a load of 5 degrees, the material is severe in cycle 15133 at a shear stress of 0.2760 N/mm2 whereas, at a load of 6 degrees the material breaks at cycle 13700 at a shear stress of 0.3312 N/mm2. The test results of the HT specimen for 4 hours at a load of 4 degrees the material broke at cycle 60417 at a shear stress of 0.1809 N/mm2. At a load of 5 degrees, the material is severe in cycle 32500 at a shear stress of 0.2261 N/mm2 whereas, at a load of 6 degrees the material breaks at cycle 22850 at a shear stress of 0.2714 N/mm2. The test results of the HT specimen for 6 hours at a load of 4 degrees the material broke in cycle 72333 at a shear stress of 0.2599 N/mm2. At a load of 5 degrees, the material is severe in cycle 42167 at a shear stress of 0.3249 N/mm2 whereas, at a load of 6 degrees the material breaks in cycle 27067 at a shear stress of 0.3898 N/mm2. The test results of the HT specimen for 8 hours at a load of 4 degrees of the material broke in the 101833 cycle at a shear stress of 0.2396 N/mm2. At a load of 5 degrees, the material is severe at cycle 47250 at a shear stress of 0.2995 N/mm2 whereas, at a load of 6 degrees the material breaks at cycle 24167 at a shear stress of 0.3594 N/mm2. It can be analyzed that the longer the specimen gets heat treatment, the specimen breaks on long cycles with relatively high shear stress. From this, it can be seen that the greater the load given will accelerate the occurrence of fractures in the sample. Keywords: Non Heat Treatment, Heat Treatment, Fatigue Testing, Cycle, Stretch.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Non Heat Treatment, Heat Treatment, Pengujian Fatik, Siklus, Tegangan.
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA495 Disasters and engineering
Divisions:	03-Faculty of Engineering > 21101-Mechanical Engineering (S2)
Depositing User:	Adryan Wijaya
Date Deposited:	22 Jan 2024 03:52
Last Modified:	22 Jan 2024 03:52
URI:	http://repository.unsri.ac.id/id/eprint/138514

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