Materials A: Lecture 12- Non-ferrous Alloys

What is dispersion strengthening in materials science?

Dispersion strengthening involves introducing small, robust particles of one phase into a second, more ductile phase to enhance the material’s strength. The dispersed phase serves as a reinforcement mechanism, impeding dislocation movement within the material.

What are the essential criteria for effective dispersion strengthening?

To achieve effective dispersion strengthening, several guideline must be followed. The dispersed phase should be hard and strong, while the matrix phase should be soft and ductile. Additionally, the dispersed phase should be discontinuous with small, round particles that interfere with slip and increase the interphase interface area

What distinguishes copper-based alloys in terms of properties and applications?

Copper-based alloys have higher densities compared to steels. They possess excellent resistance to fatigue, creep, and wear, along with superior ductility, corrosion resistance, and electrical and thermal conductivity. These alloys are used in electrical components, pumps, valves and plumbing parts

What is an intermetallic compound?

An intermetallic compound contains two or more metallic elements, producing a new phase with its own composition, crystal structure, and properties. Intermetallic compound are almost always very hard and brittle. Intermetallic or intermetallic compounds are similar to ceramic materials in terms of their mechanical properties.