Pengaruh Penambahan Aluminium (Al) terhadap Sifat Kekerasan dan Struktur Mikro Paduan Fe-Mn-Al melalui Proses Pengecoran

Fadly, Huffal Azhar (2015) Pengaruh Penambahan Aluminium (Al) terhadap Sifat Kekerasan dan Struktur Mikro Paduan Fe-Mn-Al melalui Proses Pengecoran. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Paduan Fe-Mn-Al mulai digunakan sebagai pengganti baja tahan karat pada beberapa produk komersial yang membutuhkan kekuatan yang tinggi. Pada penelitian ini dilakukan variasi penambahan Aluminium pada paduan Fe- Mn-Al untuk dapat mengetahui pengaruhnya terhadap nilai kekerasan dan morfologi strukturmikro pada paduan tersebut. Penambahan Aluminium pada paduan ini di lakukan dengan pemaduan variasi komposisi Aluminium yaitu 0, 9, 10, 11, dan 12%wt Al. Proses pemaduan dilakukan melalui peleburan dengan electric arc furnace. Peleburan dilakukan pada temperature sekitar 16000C, kemudian didinginkan dalam furnace hingga temperatur ruang. Pengujian yang dilakukan pada studi ini adalah pengujian kekerasan (metode brinell), optical emission spectrometry (OES), difraksi sinar X (XRD), dan Metalografi. Dari pengujian OES diketahui terdapat penurunan unsur paduan setelah peleburan. Hasil XRD menunjukkan terbentuknya paduan γ Fe. Sifat kekerasan pada paduan Fe-Mn-Al meningkat dengan adanya penambahan Aluminium. Pengamatan metalografi menunjukkan terbentuknya fasa γ Fe dan terbentuknya karbida κ (Fe,Mn)3AlC, akibat komposisi Aluminium dan karbon yang meningkat. ==================================================================================== Fe-Mn-Al alloy began to be used to replace stainless steel in several commercial products that have high strength. In this research, the adding of Aluminium were alloyed into Fe-Mn-Al alloys to know the effect of Aluminium adding on the hardness and microstructure of the alloying. The Aluminium’s adding in this alloy were alloyed with Aluminium varying 0, 9, 10, 11, and 12% weight (%wt). The alloying process was conducted through casting inside an electric arc furnace with crush at 1600 0C, then cooled down in the furnace until the temperature reached ambient temperature. Test being conducted in this study were Hardness Test (Brinell Methode), Optical Emission Spectrometry (OES), X-ray Diffraction Test (XRD) and Metallographic Test. The result of OES test showed the decreasing of the alloying elements after alloying process. The result of XRD test showed that γ Fe phase were formed. The hardness of Fe-Mn-Al alloy showed improvements as the Aluminium increased. Metallographic observation showed that γ Fe phase and (Fe,Mn)3AlC κ-carbides were formed as the increasing of Aluminium and carbon contents in this alloy.

Item Type: Thesis (Undergraduate)
Additional Information: RSMt 671.2 Fad p
Uncontrolled Keywords: Fe-Mn-Al; Kekerasan; Struktur mikro; Aluminium; hardness; microstructure
Subjects: T Technology > TN Mining engineering. Metallurgy > TN752.I5 Steel--Heat treatment
Divisions: Faculty of Industrial Technology > Material & Metallurgical Engineering > (S1) Undergraduate Theses
Depositing User: Mrs Anis Wulandari
Date Deposited: 14 Jun 2017 03:15
Last Modified: 14 Jun 2017 03:15
URI: http://repository.its.ac.id/id/eprint/41653

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