Strengthening of aluminium alloy 6061 by using precipitation hardening heat treatment

Izzul Hazwan , Amir (2013) Strengthening of aluminium alloy 6061 by using precipitation hardening heat treatment. Project Report. UTeM. (Submitted)

Text STRENGTHENING OF ALUMINIUM ALLOY 6061 BY USING PRECIPITATION HARDENING HEAT TREATMENT 24pages.pdf Download (5MB)

Abstract

Strengthening of aluminium alloy using precipitation hardening heat treatment involves several processes in order to achieve the objectives. The material selected is Aluminium alloy 6061 with ASTM standard. During heat treatment process, the process include such as solution treatment, precipitation hardening and over aging. In this studies, one of the specimen Aluminium alloy which is fulfill the criteria from the standard requirement will only undergo tensile test and the others will perform heat treatment process and after that will also undergo tensile test. Firstly, result will get from as delivered condition and shows that tensile stress at maximum yield load is 188.28 MPa and for solution treatment the value show is 135.96 MPa and elongation is increase to 37.2% compare to as delivered result for elongation which is 25.4%. After that, in precipitation hardening process, the result shows tensile stress at maximum load is 159.18 with elongation is 22% occur at 4 hours in precipitation hardening process. With increasing in time, over aging will occur and in this studies, after 6 hours overaging occur with result in tensile stress at maximum load is 155.32 and elongation is 11.33%. Finally after experiments is done, the result between non heat treated and heat treated will be compared. During heat treatment process, temperature will be holding constant at 530°C in solution treatment and precipitation hardening is 200°C with variable time in order to enhance strength and ductility.

Actions (login required)

View Item