Simulasi Dinamika Molekuler Pengaruh Temperatur Terhadap Sensitivitas Strain-Rate pada Fe BCC dan FeS

Pintoro, Tabina Putri (2025) Simulasi Dinamika Molekuler Pengaruh Temperatur Terhadap Sensitivitas Strain-Rate pada Fe BCC dan FeS. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Studi mengenai sifat mekanik pada besi dan besi terkorosi (FeS) dibuat model Pristine Fe dan Corroded Fe dengan dimensi diameter 50 Å dan tinggi 200 Å sesuai dengan perbandingan standar uji tarik. Hasil dari uji tarik berupa sifat mekanik Tensile Strength, Modulus Young, dan Ultimate Tensile Strain masing-masing dianalisis mengenai pengaruh suhu dengan variasi 300 K, 350 K, dan 400 K dan pengaruh orientasi kristal Fe dengan variasi [100], [110], dan [111]. Untuk model Pristine Fe akan dianalisis pengaruh strain-rate dengan variasi 1 × 107 s-1, 5 × 107 s-1, dan 9 × 107 s-1. Sedangkan untuk model Corroded Fe dianalisis pengaruh ketebalan korosi FeS sebesar 5 Å, 15 Å, dan 25 Å. Tensile Strength terbaik kekuatannya yaitu 1758,91 MPa pada variasi orientasi [111], strain-rate 9 × 107 s-1 pada suhu 300 K dan nilai kekuatan terendahnya yaitu 302,91 MPa pada variasi ketebalan korosi FeS 25 Å pada suhu 400 K. Material dengan nilai Modulus Young tertinggi yaitu 387,30 GPa pada variasi orientasi [111], strain-rate 9 × 107 s-1 pada suhu 300 K dan nilai Modulus Young memiliki nilai terendahnya yaitu pada 77,09 GPa dengan suhu 400 K dengan ketebalan korosi 25 Å. Pengaruh terhadap kenaikan suhu pada model Pristine Fe dan Corroded Fe mengakibatkan penurunan nilai Tensile Strength, Modulus Young, dan Ultimate Tensile Strain dengan nilai korelasi negatif. Sedangkan, jika model dikenai strain-rate yang lebih tinggi akan meningkatkan nilai Tensile Strength, Modulus Young, dan Ultimate Tensile Strain.
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The study of mechanical properties of iron and corroded iron (FeS) was made into Pristine Fe and Corroded Fe models with dimensions of 50 Å diameter and 200 Å height according to tensile test standards. The results of the tensile test in the form of mechanical properties of Tensile Strength, Young's Modulus, and Ultimate Tensile Strain are each explained regarding the effect of temperature with variations of 300 K, 350 K, and 400 K and the effect of Fe crystal orientation with variations of [100], [110], and [111]. For the Pristine Fe model, the effect of strain-rate with variations of 1 × 107 s-1, 5 × 107 s-1, dan 9 × 107 s-1 will be explained. While for the Corroded Fe model, the effect of FeS corrosion thickness of 5 Å, 15 Å, and 25 Å was analyzed. The best tensile strength is 1758.91 MPa at orientation variation [110], strain-rate 9 × 107 s-1at a temperature of 300 K and the lowest strength value is 302.91 MPa at FeS thickness variation of 25 Å at a temperature of 400 K. The material with the highest Young's Modulus value is 387.30 GPa at orientation variation [111], strain-rate 9 × 107 s-1 at a temperature of 300 K and the Young's Modulus value has the lowest value at 77.09 GPa at a temperature of 400 K with a corrosion thickness of 25 Å. The effect of increasing temperature on the Pristine Fe and Corroded Fe models results in a decrease in the Tensile Strength, Young's Modulus, and Ultimate Tensile Strain values with a negative correlation value. Meanwhile, if the model is subjected to a higher strain-rate, it will increase the Tensile Strength, Young's Modulus, and Ultimate Tensile Strain values.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Corroded Fe, Modulus Young, Pristine Fe, Tensile Strength, Ultimate Tensile Strain.
Subjects:	Q Science > QC Physics Q Science > QC Physics > QC 611.97.T46 Temperature effects. Including transition temperature
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Physics Engineering > 30201-(S1) Undergraduate Thesis
Depositing User:	Tabina Putri Pintoro
Date Deposited:	25 Jul 2025 05:41
Last Modified:	25 Jul 2025 05:41
URI:	http://repository.its.ac.id/id/eprint/121804

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