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.
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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 > 28201-(S1) Undergraduate Thesis |
| Depositing User: | 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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