Engineering Materials
Amorphous material is one

In which there is no definite atomic structure and atoms exist in a random pattern just as in a liquid
Which emits fumes on melting
In which atoms align themselves in a geometric pattern upon solidification
Which is not attacked by phosphorous

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Engineering Materials
Nickel in steel

Improves cutting ability and reduces hardenability
Gives ductility, toughness, tensile strength and anti-corrosion properties
Improves wear resistance, cutting ability and toughness
Refines grain size and produces less tendency to carburisation, improves corrosion and heat resistant properties

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