Abstract:
Aluminium alloy Al6061 is one of the most widely used alloys in the 6000 Series. This standard structural alloy, one
of the most versatile of the heat-treatable alloy is popular for medium to high strength range from transportation
component to machinery and equipment application to recreation product and consumer durable. The objective of the
research is to do a comprehensive study on the microstructure alteration of aluminum alloys (AL6061) on thread
cutting machining by using CNC lathe with various machining parameters that is presented in this thesis. Detailed
parameters that been used is cutting speed of 100 m/min and 150 m/min, and also the application of flooded coolant
cutting or dry cutting. All of the machining processes were carried out by HAAS SL-10 CNC Lathe. Widia CVD
coated carbide inserts as the tools in this experiment. Metallography process needs to be carried out after the
machining process. For metallurgy process, every step needs to be followed in order to meet the requirement of
specimen preparation which includes grinding and polishing process, and also etching process. The microstructure
alteration is analyzed by using Hitachi S-3400 N Fully Automated VP Scanning Electron Microscope (SEM) and all
the surface of the microstructure from each sample is captured for the results of observation
