Microstructure and Mechanical Properties of Friction Stir Welding Aluminum AA1100 with Pin Penetration Tool Parameters Nur Kholis, Helmy Purwanto, Muhammad Bagus Nuruddin, Agung Nugroho
Universitas Wahid Hasyim, Semarang, Indonesia
Abstract
Aluminum is a light metal that has high strength, is resistant to rust, is a fairly good conductor of electricity and aluminum is lighter than iron or steel. AA1100 series aluminum is an aluminum alloy mixed with other materials such as: copper, iron, chrome, manganese and zinc, with an aluminum content of 99.0%. One of the processes for joining aluminum alloys can be done by friction stir welding. This research aims to determine the strength of the physical and mechanical properties of aluminum 1100 after going through friction stir welding with variations in pin depth (plunge depth) of 3 mm 4 mm 5 mm and tool rotation speed of 1000 Rpm. Optical metallography testing is used to see the microstructure and Rockwell hardness testing and universal testing machines to test the mechanics of welded joints. From research conducted, the highest tensile strength occurred at a 5 mm pin depth variation, namely 94.44 MPa, while the lowest tensile strength occurred at a 3 mm depth variation, namely 72.58 MPa. And the highest hardness is found at a pin depth variation of 5 mm, namely 100 HRB, while the lowest hardness value occurs in welded joints with a pin depth variation of 3 mm, namely 47 HRB.
