Chapter 4
(a) Aluminum alloy is widely used due to its low density, good strength and high corrosion
resistance. For mechanical properties enhancement, it can be strengthen by various methods.
(i) With the aid of sketches, describe the common heat treatment process used to
enhance the mechanical properties of Al-Cu alloy.
(ii) Draw the expected microstructures and mechanical properties at each stage of the
heat treatment process.
Apart from heat treatment, discuss another method which can be used to strengthen this Al alloys
(b) Differentiate between cold work and hot work and discuss the microstructure and mechanical
properties changes for both processes.
Chapter 5
(a) Briefly explain the definition for the following mechanical properties;
i) Yield strength
ii) UTS
iii) Ductility
iv) Toughness
v) Stiffness’
b) Explain how to conduct the tensile test and explain how to determine the following mechanical
properties in (a) based on the results from the conducted tensile test.
(c) Define a hardness and Briefly explain how the hardness test is carried out.
