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In materials science and metallurgy, toughness is the ability of a material to absorb energy and plastically deform without fracturing. One definition of material toughness is the amount of energy per unit volume that a material can absorb before rupturing. It is also defined as a material's resistance to fracture when stressed. Toughness requires a balance of strength and ductility. Toughness can be determined by integrating the stress-strain curve. It is the energy of mechanical deformation per unit volume prior to fracture. The explicit mathematical description is:

[ "Composite material", "Metallurgy", "Ceramic materials", "Fracture Toughness Testing", "high fracture", "HY-80", "interfacial fracture", "Charpy impact test" ]
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