Abstract:
In this project, the study and obtaining A356.0 aluminum alloy, suitable for manufacturing a
block for a combustion engine prototype is performed. The physical and mechanical properties
of the alloy A356.0 are influenced by the chemical composition and microstructural
characteristics respectively. Mechanical properties such as, tensile strength and ductility are
influenced by secondary dendrite arms spacing (SDAS), grain size, form of the eutectic phase,
shape and distribution of intermetallic phases. Controlling the microstructural characteristics of
alloy A356.0 is performed by molten metal treatment, solidification process control and
application of heat treatment T6. The procedure involves the use of a master alloy, the addition
of a grain refiner agent (Al-5Ti-B) and eutectic phase modifier (99% purity strontium). Proper
temperature control, degassing and solidification processes of molten metal allows the
production of a fine equiaxed primary aluminum grain and a fine eutectic phase. The application
of heat treatment T6, ensures Mg2Si precipitates smaller and better distributed in the aluminum
matrix. A desirable microstructure is obtained by making use of the proposed production
process. A positive influence of the process on tensile strength, ductility and toughness of the
alloy A356.0 has been achieved. |
International Journal of Engineering Technology and Scientific Innovation
