Analysis of Friction Stir Welding of Aluminum 5083 H112 using Cylindrical Pin Tool with Variation in Rotation and Translation Speed

• Main Author: Ade Senatama, Bagas
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/41544
• Institution: Institut Teknologi Bandung

Increase of Aluminum consumption caused by the higher demand of light-weight product. Friction Stir Welding is one of solid-state welding techniques that using heat generated form friction between tool and specimen, plastic deformation of materials and rotation of tool to join the specimen. The objectives of this research are to determine the optimum parameters to join 8 mm-thick plates of Aluminum 5083 H112 using FSW and the effect of welding process to development of defects and microstructure, also the effect of translation speed variations to strength, hardness and impact value of weld joint. The tool used was AISI H13 with flat-bottom cylindrical threaded pin. Optimalization process shows that 16 mm/minute of translation speed, 1600 rpm of rotion speed with 6 mm of pin diameter, 7.5 mm of pin length, 20 mm of shoulder diameter produce the best weld for 8 mm-thick specimen. The variations of translation speed used was 16, 20 and 25 mm/minute with 1600 rpm of rotation speed. There is a change in microstructure of weld nugget (WN), thermo-mechanically affected zone (TMAZ) and heat affected zone (HAZ) after welding. WN has smaller grain resulting from recrystallization process and has higher hardness and impact value. The highest strength is achieved by 16 mm/minute specimen at the end of the weld joint with 103% joint efficiency where no defect observed. Other specimen has lower strength because welding process produce defect in the weld. Variations of translation speed is not affecting significantly to the hardness and impact value of the specimens.