Pengujian Kekerasan dan Analisa Struktur Mikro pada Besi Cor Kelabu dengan Scanning Electron Microscope - Energy Dispersive X-Ray Spectroscopy (SEM-EDS)

Nugroho, Bangun and , Ir. Agung Setyo Darmawan, S.T., M.T. (2023) Pengujian Kekerasan dan Analisa Struktur Mikro pada Besi Cor Kelabu dengan Scanning Electron Microscope - Energy Dispersive X-Ray Spectroscopy (SEM-EDS). Skripsi thesis, Universitas Muhammadiyah Surakarta.

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Abstract

Mechanically, gray cast iron is hard and brittle. This is because the structure of the graphite flakes is sharp and pointed, causing stress concentrations at the edges when subjected to a tensile stress. This research was conducted with the aim of analyzing the microstructure, chemical composition of the phases, and the hardness value of gray cast iron. Metallographic testing and composition testing were carried out by Scanning Electron Microscope – Energy Dispersive X-Ray Spectroscopy (SEM-EDS), hardness testing was carried out by the Micro Vickers and Rockwell methods. The results of the SEM-EDS test showed that gray cast iron contained pearlite, pearlite which was affected by oxidation and graphite. In the pearlite phase there is an element of Fe = 92.7%, C = 5.1%, O = 2.2%. In the pearlite phase affected by oxidation, there are elements of Fe = 59.6%, C = 5.3%, O = 35.0%. In the graphite phase there are elements of Fe = 2.7%, C = 90%, B = 3.5%, O = 3.8%. The presence of graphite in this case is in the form of flakes scattered in the pearlite matrix, so that it can be called pearlitic gray cast iron. The results of the Micro Vickers hardness test showed the highest hardness value in the pearlite phase with a hardness value of 229.34 VHN. While the lowest hardness value is in the graphite phase with a hardness value of 86.09 VHN. The results of the Rockwell hardness test obtained an average hardness value of 96.71 HRB, converted into a Vickers hardness number of 230 VHN.

Item Type:	Thesis (Skripsi)
Uncontrolled Keywords:	Gray cast iron, microstructure, hardness
Subjects:	T Technology > TJ Mechanical engineering and machinery T Technology > TS Manufactures
Divisions:	Fakultas Teknik > Teknik Mesin
Depositing User:	BANGUN NUGROHO
Date Deposited:	06 Apr 2023 04:50
Last Modified:	06 Apr 2023 04:50
URI:	http://eprints.ums.ac.id/id/eprint/111087

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