Material Chemistry: Metal Alloys & Processing

These flashcards cover key terms and concepts from the lecture on Metal Alloys and their processing techniques.

Low Alloy Steels

Alloys with carbon content typically below 0.25 wt%.

Ferrous Alloys

Alloys primarily consisting of iron.

Cast Irons

Ferrous alloys containing more than 2.1 wt% carbon.

Heat Treatment

Techniques used to improve the mechanical properties of alloys.

Ductile Iron

Iron alloy with a graphite nodular structure, improving ductility.

Stainless Steel

Steel containing more than 11% chromium, highly resistant to corrosion.

Hardenability

The ability of a steel to harden when cooled from high temperature.

Precipitation Hardening

A heat treatment technique to increase the strength of alloys by forming small particles.

Cementite

A hard compound in steel, denoted as Fe3C, which contributes to brittleness.

Normalizing

A heat treatment that subjects steel to heating and air cooling to refine grain structure.

AISI/SAE

American Iron and Steel Institute/Society of Automotive Engineers nomenclature for steel classification.

Slag Purification

The removal of impurities from molten iron by forming a slag.

Tensile Strength (TS)

The resistance of a material to breaking under tension.

Elongation (%EL)

A measure of ductility based on the percentage increase in length when a sample is pulled until breaking.

Nonferrous Alloys

Alloys that do not predominantly contain iron.

Compacted Graphite Iron

An iron with a special graphite structure that enhances its mechanical properties.

Annealing

A thermal process to relieve internal stresses and increase ductility.