Characterisation of an aluminium engine block

摘要

The microstructure of cast engine blocks made from an aluminium alloy was studied. Two sections of the block were selected; corresponding either to the middle or to the front end. The microstructure was evaluated at six different points in each section; two located towards the bottom of the block, within the affected by a grey iron insert, and the other four points were located in a region close to the cast-in grey iron liners. It was found that microstructural features, such as secondary arm spacing and size of silicon platelets, varied within the block.