Give an example of each of the following processes:
a) mass change;
b) phase change;
c) structure change;
d) deformation;
e) consolidation.
a) Processes that change the mass of a material can remove or add mass. Mass can be removed by using machine and hand tools to drill, saw, grind, turn, or mill materials. Mass can also be removed by using techniques, such as electrical discharge machining that uses high electrical currents to melt away small particles of material.
b) Processes that change the phase of a material make solid parts from liquid or gaseous materials. Some examples of phase-change processes are metal casting, injection molding, and blow molding of plastics
c) Structure-change processes affect the atomic structure of a material. The change can be throughout its mass or just on the surface. Three processes that affect the structure of the material are hardening,
tempering, and annealing
d) Deformation processes change the shape of a material without changing its mass. Deformation processes include forging, rolling,machine pressing, and drawing
e) Consolidation processes are used to combine materials. These processes can include fastening and joining techniques, making composite materials, and coating materials with paint or finish.
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