RAHMAT, FAUZAN (2025) ANALISA PENGARUH VARIASI HOLDING TIME HEAT TREATMENT TERHADAP SIFAT MEKANIK, KETAHANAN KOROSI DAN STRUKTUR MIKRO STAINLESS STEEL 304 THIN FOIL. S1 thesis, Fakultas Teknik Universitas Sultan Ageng Tirtayasa.
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Abstract
Stainless steel is a steel alloy that contains at least 11.5% chromium by weight. This type of steel has better corrosion resistance compared to other steel alloys. SUS 304 is one of the stainless steels categorized as austenitic. This study aims to analyze the effect of heat treatment consisting of austenitizing at 900°C and tempering at 400°C, with variations in holding time, on the mechanical properties, corrosion resistance, and microstructure of SUS 304 thin foil used as a protective layer for aircraft sensors.The methods used include tensile testing, corrosion testing using the weight loss method, and metallographic observations. The austenitizing holding times were set at 120, 240, and 360 minutes, while tempering was conducted for 30, 60, and 90 minutes. The results show that heat treatment at an austenitizing temperature of 900°C leads to the transformation of austenite to martensite after quenching. During tempering at 400°C, the precipitation of chromium carbide at grain boundaries was observed.Longer holding times resulted in a decrease in mechanical properties and corrosion resistance. At an austenitizing duration of 360 minutes and tempering for 90 minutes, the material showed the lowest true stress value of 232.25 N/mm² with a true strain of 20%. In addition, the highest corrosion rate (7.55 mmpy) also occurred at the 360-minute austenitizing duration. The resulting microstructure includes austenite, lath martensite, and chromium carbide compounds, which influence the material’s mechanical strength and corrosion resistance.
| Item Type: | Thesis (S1) | |||||||||
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| Additional Information: | Stainless Steel 304 adalah salah satu material yang paling banyak digunakan dalam peralatan industri, karena tingkat keasaman yang cukup tinggi dan ketahanan terhadap korosi yang sangat tinggi. Material ini dapat menahan korosi yang disebabkan oleh berbagai zat kimia. Proses perlakuan panas pada melibatkan pemanasan pada suhu tertentu, ditahan dalam waktu tertentu, dan didinginkan pada media tertentu. Tujuannya adalah untuk meningkatkan keuletan, menghilangkan tegangan internal, menghaluskan butir kristal, serta meningkatkan kekerasan dan kekuatan tarik logam | |||||||||
| Uncontrolled Keywords: | SUS 304 Thin Foil, Heat Treatment, Struktur Mikro, Uji Tarik dan Ketahanan Korosi | |||||||||
| Subjects: | T Technology > TN Mining engineering. Metallurgy T Technology > TS Manufactures |
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| Divisions: | 03-Fakultas Teknik > 27201-Jurusan Teknik Metalurgi | |||||||||
| Depositing User: | Mr Rahmat Fauzan | |||||||||
| Date Deposited: | 23 Jun 2025 04:37 | |||||||||
| Last Modified: | 23 Jun 2025 04:37 | |||||||||
| URI: | http://eprints.untirta.ac.id/id/eprint/49811 |
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