What is an intermetallic precipitate?
On the other hand, intermetallics are compounds made up of two or more elements, producing a new phase with its own composition, crystal structure and properties. They are usually very hard and brittle, thus providing excellent dispersion strengthening of the softer matrix.
What are second phase precipitates?
Theory. The primary species of precipitation strengthening are second phase particles. These particles impede the movement of dislocations throughout the lattice. You can determine whether or not second phase particles will precipitate into solution from the solidus line on the phase diagram for the particles.
What is meant by the term intermetallic compound?
intermetallic compound, any of a class of substances composed of definite proportions of two or more elemental metals, rather than continuously variable proportions (as in solid solutions). The crystal structures and the properties of intermetallic compounds often differ markedly from those of their constituents.
What are intermetallic compounds examples?
Properties and applications
| Intermetallic Compound | Melting Temperature (°C) | Density (kg/m3) |
|---|---|---|
| FeAl | 1250-1400 | 5600 |
| Ti3Al | 1600 | 4200 |
| MoSi2 | 2020 | 6310 |
What is intermetallic phase in duplex stainless steel?
Duplex steels have a two-phase microstructure made up of austenite and ferrite. They also have better toughness than ferritic stainless alloys, and double the strength of both austenitic and ferritic stainless sheets of steel.
What is a second phase particle?
Second-phase particles are another important type of microstructure which can significantly increase strength. The controlled formation of cluster zones and precipitates is discussed in detail, using the Al–Cu and other systems as illustrations.
What are precipitates why are they significant in precipitation hardening?
Precipitation hardening is a method that makes use of heat application to a pliable material, like metal alloy, to make it tougher. This technique gives strength to alloys by hardening them and adding fine, solid impurities known as precipitates.
How do intermetallic compounds form?
Intermetallic compounds are formed from electropositive and electronegative metals which chemically bond to form compounds with a specific composition and crystalline structure.
What are intermetallic compounds used for?
Properties and applications Other intermetallics can exhibit improved ductility by alloying with other elements to increase grain boundary cohesion. Alloying of other materials such as boron to improve grain boundary cohesion can improve ductility in many intermetallics.