Design Technology - Topic 4.2a

Crystalline structures made up of grains

Formed through slow cooling. Increases tensile strength, toughness, ductility, and malleability

Formed through fast cooling. Decreases tensile strength, toughness, and ductility. Increases brittleness

The mixture of a metal with another material.

Process of combing a metal with another material. Increases hardness and strength, but decreases malleability and ductility

Process of increasing the hardness of a metal through applying a process when the metal is cold

Application of heat after work hardening. Reduces some of the hardness and stiffness, but it increases the toughness and ductility of the metal

Metal alloys that exhibit high degrees of mechanical strength, resistance to corrosion, and surface stability

Slow expansion or deformation of a material over time. Can be exaggerated by high temperatures or prolonged force

The reaction of metal with oxygen

Alloys containing iron, making them magnetic. Mild steel, stainless steel, and cast iron

Alloys that do not contain iron. Aluminum, copper, silver, tin, and zinc

Protective coatings that protect against corrosion