Studi Pengaruh Temperatur Dan Holding Time Solution Annealing Terhadap Struktur Mikro Dan Ketahanan Korosi Pada Super Duplex Saf 2507

Wulanari, Dieski Nuntasi (2016) Studi Pengaruh Temperatur Dan Holding Time Solution Annealing Terhadap Struktur Mikro Dan Ketahanan Korosi Pada Super Duplex Saf 2507. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Super duplex stainless steel merupakan material dengan ketahanan korosi yang tinggi. Tetapi adanya presipitasi fasa sigma mengakibatkan turunnya ketahanan korosi. Penelitian ini bertujuan untuk mengetahui pengaruh temperatur dan holding time solution annealing terhadap struktur mikro dan ketahanan korosi super duplex SAF 2507. Solution annealing tersebut dilakukan untuk melarutkan presipitasi fasa sigma. Variasi temperatur pada proses solution annealing ialah 1000 oC, 1065 oC dan 1125 oC dengan waktu tahan selama 15 dan 30 menit untuk masing-masing temperatur. Pengaruh dari proses solution annealing dianalisis dengan XRD, Mikroskop Optik, SEM dan Uji Weight Loss. Dari hasil pengujian yang dilakukan, presipitasi fasa sigma masih ditemukan pada hasil variasi temperatur 1000oC, tetapi sudah benar-benari larut pada hasil variasi 1065 oC dan 1125 oC. Pada pengujian weight loss, kehadiran fasa sigma pada hasil variasi temperatur 1000oC menurunkan ketahanan korosi yang mengakibatkan banyaknya massa yang hilang dibandingkan dengan hasil variasi temperatur 1065oC dan 1125oC. ============================================================ resistance but the it can decreased by precipitation of sigma phase. The aims of this research is to study the effect of temperature and holding time of solution annealing on microstructure and corrosion resistance of super duplex SAF 2507. Solution annealing process was done to dissolve precipitation of sigma phase. Variation of solution annealing temperatures were 1000oC, 1065oC and 1125oC with holding time 15 and 30 minutes for each temperature. Effect of solution annealing process was characterized by XRD, SEM, Optical Microscopy and Weight Loss Test. The result showed precipitation of sigma phase had not dissolved by solution annealing at 1000oc but completely dissolved by solution annealing at 1065oC and 1125oC. This precipitation of sigma phase at 1000oC affected its corrosion resistance causing excessive amount of weight loss compared to the result of 1065oC and 1125oC.

Item Type: Thesis (Undergraduate)
Additional Information: RSMt 620.182
Uncontrolled Keywords: super duplex, SAF 2507, sigma phase, solution annealing, corrosion resistance.
Subjects: G Geography. Anthropology. Recreation > G Geography (General) > G70.212 ArcGIS. Geographic information systems.
G Geography. Anthropology. Recreation > GE Environmental Sciences
G Geography. Anthropology. Recreation > GT Manners and customs
Divisions: Faculty of Industrial Technology > Material & Metallurgical Engineering > (S1) Undergraduate Theses
Depositing User: EKO BUDI RAHARJO
Date Deposited: 17 Oct 2019 02:17
Last Modified: 17 Oct 2019 02:17
URI: http://repository.its.ac.id/id/eprint/71232

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