strengthening of Cu- Sn alloy

1. Solid solution Strengthening
in Cu-Sn alloy
S UDAY KUMAR
22MMM2RO4
MT , NIT Warangal

2. • Bronze is an alloy consisting primarily of copper, commonly with
about 12–12.5% tin and often with the addition of other metals (such
as aluminium, manganese, nickel or zinc) and sometimes non-metals,
such as phosphorus, or metalloids such as arsenic, or silicon.
• These additions produce a range of alloys that may be harder than
copper alone, or have other useful properties, such as strength,
ductility, or machinability.

3. LIST OF BRONZE ALLOYS
• Aluminum Bronze
• Phosphor Bronze
• Silicon Bronze
• Magnesium Bronze
• Nickel Brass
• Copper Nickel

4. Properties of Bronze
• Bronzes are typically ductile alloys, considerably less brittle than cast iron.
Typically bronze oxidizes only superficially; once a copper oxide (eventually
becoming copper carbonate) layer is formed, the underlying metal is
protected from further corrosion. This can be seen on statues from the
Hellenistic period. However, if copper chlorides are formed, a corrosion-
mode called "bronze disease" will eventually completely destroy it.
• Copper-based alloys have lower melting points than steel or iron and are
more readily produced from their constituent metals. They are generally
about 10 percent denser than steel, although alloys using aluminum or
silicon may be slightly less dense. Bronze is a better conductor of heat and
electricity than most steels. The cost of copper-base alloys is generally
higher than that of steels but lower than that of nickel-base alloys.

5. • Copper and its alloys have a huge variety of uses that reflect their
versatile physical, mechanical, and chemical properties. Some
common examples are the high electrical conductivity of pure copper,
low-friction properties of bearing bronze (bronze that has a high lead
content— 6–8%), resonant qualities of bell bronze (20% tin, 80%
copper), and resistance to corrosion by seawater of several bronze
alloys.
• The melting point of bronze varies depending on the ratio of the alloy
components and is about 950 °C (1,742 °F). Bronze is usually
nonmagnetic, but certain alloys containing iron or nickel may have
magnetic properties

6. Application of Bronze
• Bronze is used in the construction of sculptures
• musical instruments and medals, and in industrial applications such
as bushings and bearings, where its low metal on metal friction is an
advantage.
• Bronze also has nautical applications

8. THANK YOU