Engineering Materials
The strength is the ability of a material to resist

Deformation under stress
Externally applied forces with breakdown or yielding
Fracture due to high impact loads
None of these

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Engineering Materials
Cobalt in steel

Gives ductility, toughness, tensile strength and anti corrosion property
Refines grain size and produces less tendency to carburisation, improve corrosion and heat resistant proper ties
Improves cutting ability and reduce hardenability
Improves wear resistance, cutting ability and toughness

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