Which material group typically exhibits the highest ductility characteristics__________________?
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Answer: A. face-centred cubic lattice
Explanation
Face-centered cubic metals possess a large number of active slip systems for dislocation movement. This high number of slip planes allows the crystal lattice to deform without fracturing. Consequently, face-centred cubic lattice structures exhibit superior ductility characteristics. Ductility is the mechanical ability of a material to deform plastically under tensile stress. Metals like copper, gold, aluminium, and austenitic steels feature face-centered cubic lattices. Dislocation glide happens more readily when atoms are closely packed across multiple planes.
Highly ductile materials are preferred for wire drawing and deep drawing manufacturing processes. Structural components made from FCC metals can absorb energy through plastic deformation. This property prevents sudden brittle shattering under unexpected high-stress loads. Body-centered cubic lattices generally show lower ductility at lower operating temperatures. Hexagonal close-packed lattices have fewer slip systems, resulting in reduced room-temperature ductility. Not all lattice structures provide equal formability for heavy industrial manufacturing.
- Subject
- Engineering
- Category
- Mechanical Engineering
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- —
- Difficulty
- medium
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