Analisa Pengaruh Variasi Temperatur dan Waktu Penuaan (Aging) Perlakuan Panas T6 Terhadap Ukuran Endapan (Presipitat) Coran Remelting AA 6061. (The Effect of Aging Temperature and Time Variations in T6 Heat Treatment on The Precipitate Size of Remelted Aa 6061 Aluminum Alloy Castings).

Liliefna, Filden (2026) Analisa Pengaruh Variasi Temperatur dan Waktu Penuaan (Aging) Perlakuan Panas T6 Terhadap Ukuran Endapan (Presipitat) Coran Remelting AA 6061. (The Effect of Aging Temperature and Time Variations in T6 Heat Treatment on The Precipitate Size of Remelted Aa 6061 Aluminum Alloy Castings). Undergraduate thesis, Universitas 17 Agustus 1945 Surabaya.

Preview	Text (ABSTRAK) ABSTRAK.pdf Download (1MB) | Preview
	Text (BAB I) BAB I .pdf Restricted to Repository staff only Download (217kB) | Request a copy
	Text (BAB II) BAB II .pdf Restricted to Repository staff only Download (482kB) | Request a copy
	Text (BAB III) BAB III .pdf Restricted to Repository staff only Download (1MB) | Request a copy
	Text (BAB IV) BAB IV .pdf Restricted to Repository staff only Download (2MB) | Request a copy
	Text (BAB V) BAB V .pdf Restricted to Repository staff only Download (213kB) | Request a copy
	Text (JURNAL) JURNAL.pdf Restricted to Repository staff only Download (688kB) | Request a copy
	Text (TURNITIN) TURNITIN .pdf Restricted to Repository staff only Download (780kB) | Request a copy

Abstract

AA 6061 aluminum alloy is widely used in the automotive and aerospace industries due to its low density, excellent corrosion resistance, and mechanical properties that can be enhanced through heat treatment. This study aimed to analyze the effect of aging temperature and aging time variations during T6 heat treatment on the precipitate size of remelted AA 6061 aluminum alloy castings. The research was conducted experimentally by remelting AA 6061 aluminum alloy using a crucible furnace, followed by T6 heat treatment consisting of solution treatment, quenching, and artificial aging. The aging temperatures employed were 165°C, 185°C, and 205°C, while the aging times were 1.5, 2.5, and 3.5 hours. The specimens were characterized using the Brinell hardness test and Scanning Electron Microscopy–Energy Dispersive X-ray Spectroscopy (SEM–EDX). The results showed that the as-cast remelted specimen without T6 heat treatment exhibited a hardness value of 52.53 BHN. After T6 heat treatment, the hardness increased, reaching an optimum value of 66.46 BHN at an aging temperature of 185°C for 2.5 hours. SEM observations indicated that this condition produced finer and more uniformly distributed precipitates, which were more effective in inhibiting dislocation movement. In contrast, higher aging temperatures and longer aging times promoted precipitate coarsening, thereby reducing the effectiveness of precipitation strengthening and limiting the improvement in hardness. Therefore, an aging temperature of 185°C and an aging time of 2.5 hours were identified as the optimum conditions for improving the mechanical properties of remelted AA 6061 aluminum alloy castings through the precipitation hardening mechanism.

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	AA 6061; Heat Treatment T6; Aging; Precipitate; Remelting; SEM - EDX; Hardness
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Divisions:	Fakultas Teknik > Program Studi Teknik Mesin
Depositing User:	1422200134 Filden Liliefna
Date Deposited:	24 Aug 2026 05:46
Last Modified:	24 Aug 2026 05:46
URI:	http://repository.untag-sby.ac.id/id/eprint/46591

Actions (login required)

View Item