Pengaruh Proses Annealing terhadap Kualitas Bending Doubler Aluminium Alloy seri 6061-T3 pada Struktur Skin Center Wing Box

Abstract

This research was conducted to determine how the annealing process affects the bending quality of the doubler made from aluminum alloy series 6061 T3, which is used in the skin center wing box structure of aircraft. The aluminum alloy 6061 T3 is known for its good strength, but it tends to be relatively hard, making it prone to cracking or defects during the bending process. Therefore, a heat treatment process such as annealing is required to improve the ductility of the material and reduce residual stresses that can lead to failure during fabrication. In this study, the aluminum material was subjected to annealing treatment with variations in heating time before performing the bending test. The purpose of this heat treatment was to soften the metal structure and reduce internal stress so that the bending process could be performed more effectively. After the bending test, the surface of the specimen was examined to identify cracks or defects. The test results showed that the annealing process successfully improved the ductility of the aluminum and reduced the risk of cracking, leading to better bending quality and increased durability of the wing box structure.