ABSTRACT
This chapter provides a detailed overview of the classification of additive manufacturing (AM) processes on various bases, such as physical state of raw material, processing techniques, underlying technology, fabrication technique, energy source, raw materials being used, material delivery system. It further discusses common AM defects. AM techniques can be classified according to diverse bases. Almost all AM systems utilize similar principles, with a few exceptions of voxelization or hybrid techniques. AM techniques are being increasingly utilized in aviation, automotive and marine sectors due to their ability to fabricate intricate parts. They are increasingly replacing conventional manufacturing techniques for numerous critical applications. In general, it can be concluded that, though AM techniques are game-changers and enabling technologies, much research work is required to fully utilize their potential for critical applications apart from known commercial applications. A detailed cost benefit and economic analysis is therefore mandatory before choosing a particular process.
