Advanced Material Removal Processes represent one of the technologies, which emerged
after the second world war to cope up with the demands of sophisticated, more durable
and cost competitive products. With the advent of new materials such as metal-matrix
composites, super-alloys, ceramics, aluminates and high performance polymers etc. and
the stringent requirements to machine complex geometrical shapes with high precision
and accuracy, a strong need existed for the development of advanced material removal
processes. The processes in this category differ from conventional processes in either
utilization of energy in an innovative way or, in using forms of energy that were unused
for the purpose of manufacturing. The conventional machining processes normally
involve the use of energy from electric motors, hydraulics, gravity, etc. and rely on the
physical contact between tools and work components. On the contrary, advanced material
removal processes utilize energy from sources such as electrochemical reactions, high
temperature plasma, high velocity jets and loose abrasives mixed in various carriers etc.
Although these processes were originally developed to handle unique problems in
aerospace industry (machining of very hard and tough alloys), today wide range of
industries have adopted this technology in numerous manufacturing operations.