Engineering Materials
Nickel in steel

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

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Engineering Materials
Which of the following statement is true about brittle fracture?

Brittle fracture is always preceded by noise
High temperature and low strain rates favour brittle fracture
Cup and cone formation is characteristic for brittle materials
Many metals with hexagonal close packed (H.C.P) crystal structure commonly show brittle fracture

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