In the malleability and ductility test, if the bent piece cracks on the inside, it indicates a lack of which property?

In the malleability and ductility test, if the bent piece cracks on the inside, it indicates a lack of which property?

• A. Ductility
• B. Toughness
• C. Elasticity
• D. Malleability

Answer: (A)

Ductility is the ability of a material to deform plastically, such as bending or drawing, without cracking. When a piece is bent, it must accommodate significant plastic deformation; if it cracks on the inner surface of the bend, it shows the metal cannot undergo that deformation smoothly and thus lacks ductility. Malleability concerns deforming under compressive forces without cracking, elasticity is about returning to shape after deformation, and toughness is about absorbing energy before fracture. The internal crack during bending specifically points to insufficient ductility.

Ductility is the ability of a material to deform plastically, such as bending or drawing, without cracking. When a piece is bent, it must accommodate significant plastic deformation; if it cracks on the inner surface of the bend, it shows the metal cannot undergo that deformation smoothly and thus lacks ductility. Malleability concerns deforming under compressive forces without cracking, elasticity is about returning to shape after deformation, and toughness is about absorbing energy before fracture. The internal crack during bending specifically points to insufficient ductility.