Pengaruh perlakuan panas terhadap perambatan retak pada material high tensile steel

Bintang, Rahadi (2007) Pengaruh perlakuan panas terhadap perambatan retak pada material high tensile steel. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Tugas akhir ini bertujuan untuk mengetahui pengaruh perlakuan panas dengan metode pendinginan cepat terhadap kekuatan lelah material high tensile steel AH-36. Pengujian dilakukan menggunakan spesimen compact tension dengan ketebalan 10 mm, variasi media pendingin yaitu: 5 °C, 15 °C, dan 30 °C, serta suhu pemanasan 900 °C. Pembebanan yang diberikan pada masing-masing spesimen adalah 41 kN, 37 kN, dan 36 kN.

Persamaan Paris, da/dN = C (ΔK)^m, berdasarkan hasil percobaan digunakan untuk mengetahui laju perambatan retak. Persamaan Paris berdasarkan percobaan berturut-turut dari material hasil perlakuan panas dengan suhu media pendingin 5 °C, 15 °C, dan 30 °C adalah da/dN = 2 × 10⁻¹¹ (ΔK)^3,456, da/dN = 1,03 × 10⁻¹⁰ (ΔK)^3,0227, dan da/dN = 9,06 × 10⁻¹¹ (ΔK)^3,0157. Perubahan laju perambatan retak material hasil perlakuan panas dengan suhu media pendingin 5 °C, 15 °C, dan 30 °C tidak signifikan.
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The purpose of this final project is to investigate the effect of heat treatment, especially the quenching method, on the crack growth behavior of high tensile steel AH-36.

The experiment used three compact tension specimens with edge cracks and a thickness of 10 mm. After being heated to approximately 900 °C, each specimen was cooled directly in water at different temperatures: 5 °C (specimen I), 15 °C (specimen II), and 30 °C (specimen III). The loads applied to each specimen were 41 kN, 37 kN, and 36 kN.

Crack growth was calculated based on Paris' equation obtained from the testing. The Paris' equations for quenching temperatures of 5 °C, 15 °C, and 30 °C are da/dN = 2 × 10⁻¹¹ (ΔK)^3.456, da/dN = 1.03 × 10⁻¹⁰ (ΔK)^3.0227, and da/dN = 9.06 × 10⁻¹¹ (ΔK)^3.0157, respectively. The effect of quenching on the material at quenching temperatures of 5 °C, 15 °C, and 30 °C was not significant.

Item Type:	Thesis (Other)
Additional Information:	620.112 6 Bin p
Uncontrolled Keywords:	fatigue life, perlakuan panas, high tensile, laju perambatan retak, :fatigue life, heat treatment, high tensile, crack growth
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA418.38 Materials--Fatigue.
Divisions:	Faculty of Marine Technology (MARTECH) > Naval Architecture and Shipbuilding Engineering > 36201-(S1) Undergraduate Thesis
Depositing User:	magang .
Date Deposited:	07 Oct 2026 08:32
Last Modified:	07 Oct 2026 08:32
URI:	http://repository.its.ac.id/id/eprint/145412

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