Apure metal can be strengthening by addition of impurities. identify strengthening mechanism that utilize impurities and discuss the method of strengthening

Explanation:

Strengthening is the method to improve the strength of material because different type of material property requires for different requirement .Some times requires more ductility,some time requires more strength.

When impurities are mixed with the pure metal then the strength of metal will increases and this is called the strengthening of metal.

The methods of strengthening are as follows

1.Solid solution strengthening and alloying

2.Work hardening

3.Transformation hardening

4.Grain boundary  strengthening

5.Precipitation hardening

answer:

explanation:

assault rifle is a rapid-fire, magazine-fed rifle designed for military use. it is a shoulder-fired weapon that allows the shooter to select between semi-automatic (requiring you pull the trigger for each shot), fully automatic (hold the trigger and the gun continuously fires) or three-shot-burst modes.

answer: a

a is the answer