Effect of Heat Treatment on Mechanical and Vibration Properties for 6061 and 2024 Aluminum Alloys

This paper investigates the effect of heat treatment on the mechanical properties (yield and ultimate strength, elongation, hardness, and modulus of elasticity) and dynamic characteristics (natural frequency and dynamic response) under impulse loading for 6061 and 2024 aluminum alloys in O, T4, and T6 treatment conditions to study the effect of heat treatments. The study was conducted by implementing various techniques. The first step was to evaluate the mechanical properties and the natural frequency for the aluminum alloys; this was performed experimentally, after undergoing various heat treatment methods. In the second part of his study a numerical method (finite element) and he natural frequency was calculated for an aluminum plate after which a comparison was made with the results that were obtained experimentally, also the dynamic response for a plate under impulse load was evaluated numerically. Finally evaluating the dynamic plate response analytically by solution the general equation of motion for a plate under impulse load, then a comparison was performed on the results hat were obtained from this research the results together. When a comparison was made for normal frequency and platelet response it gave an acceptable percentage of error. Therefore, the results showed an improvement of the mechanical and dynamic properties for aluminum alloys, and that heat treatment gives acceptable results, due to the improvement of these properties that reach up to 20%.