Engineering Materials
Carbon steel is

Extensively used for making cutting tools
Refined from cast iron
An alloy of iron and carbon with varying quantities of phosphorus and sulphur
Made by adding carbon in steel

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Engineering Materials
Stress relaxation is the phenomenon

In which stress remains constant on increasing load
In which parts are not loaded
Stress reduces on increasing load
In which deformation tends to loosen the joint and produces a stress reduced

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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
In which atoms align themselves in a geometric pattern upon solidification
Which is not attacked by phosphorous
Which emits fumes on melting

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