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PERBANDINGAN BESARAN ENERGI AKTIVASI DAN TITIK LELEH DARI AA5052 DAN AA7075 DENGAN MENGGUNAKAN ALAT THERMOGRAVIMETRY ANALYZER

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Aluminum alloys are widely used materials due to their good corrosion resistance and high strength-to-weight ratio. AA5052 and AA7075 are two types of aluminum alloys that differ in alloying elements and thermal properties. This study aims to analyze the activation energy and melting point of AA5052 and to compare the results with those of AA7075 using Thermogravimetric Analysis (TGA) and Differential Thermal Analysis (DTA). The tests were conducted by heating the samples to a maximum temperature of 900 °C under an oxygen air atmosphere. The activation energy was determined using a kinetic reaction approach based on the Arrhenius equation through the relationship between ln k and 1/T. The results show that AA5052 has a liquidus melting temperature of 649 °C with an activation energy of 68.176 kJ/mol, whereas AA7075 has a liquidus melting temperature of 633.826 °C with an activation energy of 202.705 kJ/mol. The differences in activation energy and melting temperature are influenced by variations in alloying element composition, particularly the higher contents of zinc, magnesium, and copper in AA7075. The results of this study are expected to serve as a reference for understanding the thermal behavior of aluminum alloys and as a basis for determining heat treatment parameters.

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Detail Information

Series Title

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Call Number

T1916632025

Publisher

Indralaya : Prodi Teknik Mesin, Fakultas Teknik Universitas Sriwijaya., 2025

Collation

xiii, 94 hlm.; ilus.; 29 cm

Language

Indonesia

ISBN/ISSN

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Classification

669.722 07

Content Type

Text

Media Type

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Carrier Type

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Edition

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Subject(s)

Prodi Teknik Mesin
Aluminium—Paduan—Pengujian

Specific Detail Info

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Statement of Responsibility

TUTI

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