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

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

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Engineering Materials
Tungsten in steel

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

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