PENGARUH AGE HARDENING TERHADAP SIFAT MEKANIK MATERIAL ALUMINIUM 2024 T3 SETELAH DILAKUKAN PENGELASAN MENGGUNAKAN METODE FRICTION STIR WELDING

Nurrohman, Ali (2021) PENGARUH AGE HARDENING TERHADAP SIFAT MEKANIK MATERIAL ALUMINIUM 2024 T3 SETELAH DILAKUKAN PENGELASAN MENGGUNAKAN METODE FRICTION STIR WELDING. Skripsi thesis, Institut Teknologi Dirgantara Adisutjipto.

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Abstract

Aluminum 2024 T3 is a difficult material for fusion welding. Therefore, the method used for welding aluminum is friction stir welding. The weakness of the friction stir welding process is the decrease in the tensile strength of the welding results compared to the tensile strength of the base metal. To increase the tensile strength of the welding results, an age hardening process is carried out on the specimens, which are 3 (three) stages in the age hardening process. The age hardening process starts with solution treatment then quenching and finally artificial aging. The solution treatment process is heated at a temperature of 500 oC with a holding time of 1 hour and cooled rapidly using water to room temperature. Then proceed with the artificial aging process, namely reheating at temperature variations of 145oC, 150 oC, and 165oC with a holding time of 6 hours. The results obtained showed an increase in the maximum tensile strength, yield strength, maximum ultimate strain, and modulus of elasticity in the specimens after the age hardening process. The highest tensile strength, yield strength, and modulus of elasticity were at the artificial aging temperature of 155 oC. And the highest maximum ultimate strain is at the artificial aging temperature of 145oC.

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