Fracture toughness pada aluminium-steel structure transition joints dengan precrack tip pada sisi aluminium dan baja

Nurdiyono, Mahfud Gesang (2009) Fracture toughness pada aluminium-steel structure transition joints dengan precrack tip pada sisi aluminium dan baja. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Structural Transition Joints adalah sebuah _bimetal system_ yang memungkinkan dilakukan penyambungan dua logam berbeda dengan menggunakan teknik pengelasan standar, dalam hal ini yang digabungkan adalah aluminium dengan baja. Dua atau tiga logam berbeda digabungkan menggunakan metode _explosion bonding process_. Penelitian ini bertujuan untuk mengetahui karakteristik _fracture toughness_ pada STJ NC 603, di mana retak diletakkan tegak lurus terhadap _interface_.

Pengujian _fracture toughness_ dilakukan dengan metode _three-point bending_ dengan mengacu pada standar ASTM E399. Jumlah spesimen yang diuji adalah enam spesimen, masing-masing tiga spesimen untuk _pre-crack tip_ pada sisi aluminium dan pada sisi baja. Dari pengujian didapatkan nilai KQ dari tiap spesimen, serta karakteristik _crack propagation_ dari _bimetal system_.

Hasil pengujian menunjukkan bahwa nilai KQ rata-rata spesimen uji Nobelclad _bimetal aluminum-steel structural transition joint_ dengan _pre-crack tip_ pada sisi aluminium sebesar 41,95 Ksi√inch. Sedangkan nilai KQ rata-rata spesimen uji Nobelclad _bimetal aluminum-steel structural transition joint_ dengan _pre-crack tip_ pada sisi baja sebesar 24,6 Ksi√inch. Selain itu, pada spesimen uji Nobelclad _bimetal aluminum-steel structural transition joint_ dengan _pre-crack tip_ pada sisi aluminium terjadi kerusakan pada struktur bimetal karena retak menjalar ke arah horizontal sejajar dengan _interface_.
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Structural Transition Joint is a bimetal system that enables the welding of two different metals using a conventional welding process; in this case, aluminum is welded to steel. Two or three different metals are joined using an explosion bonding process. The purpose of this research is to examine the fracture toughness characteristics of STJ NC 603, where the crack is positioned perpendicular to the interface.

The fracture toughness tests were conducted using the three-point bending method based on the ASTM E399 standard. Six specimens were tested in this research, consisting of three specimens with the pre-crack tip on the aluminum side and three specimens with the pre-crack tip on the steel side. The tests were conducted to obtain the KQ values of each specimen, as well as the crack propagation characteristics of the bimetal system.

The test results showed that the average KQ value of the Nobelclad bimetal aluminum-steel structural transition joint test specimens with the pre-crack tip on the aluminum side was 41.95 Ksi√inch. The average KQ value of the Nobelclad bimetal aluminum-steel structural transition joint test specimens with the pre-crack tip on the steel side was 24.6 Ksi√inch. Structural failure of the bimetal occurred in the specimens with the pre-crack tip on the aluminum side due to the crack propagating horizontally and parallel to the interface.

Item Type:	Thesis (Other)
Additional Information:	620.112 6 Nur f
Uncontrolled Keywords:	fracture toughness, three point bending, structural transition joint, bimetal, triclad, fracture toughness, three point bending, structural transition joint, bimetal, triclad.
Subjects:	V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM163 Hulls (Naval architecture)
Divisions:	Faculty of Marine Technology (MARTECH) > Marine Engineering > 36202-(S1) Undergraduate Thesis
Depositing User:	magang .
Date Deposited:	08 Oct 2026 03:01
Last Modified:	08 Oct 2026 03:01
URI:	http://repository.its.ac.id/id/eprint/145426

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