Metals with what type of crystal lattice less prone to brittle fracture? Why?
What makes a metal ductile? What is the difference between ductile and brittle?
My answer would be Steel (AISI 1060 0.6% carbon), because it has the highest ultimate tensile strength for a metallic lattice at 2,200-2,482 MPa and density 7.8 g/cm^3.
Tungsten is at 1,510 MPa and density 19.25 g/cm^3.
Ductility occurs in materials where valence shell electrons are not rigidly bound and are thus shared. These electrons atoms to slide past each other without breaking. It occurs under tension.
Brittleness is the tendancy of a material to fail under stress, usually tension, rather than deform. It's not normally applied to shear. Generally, if there is little or no plastic deformation before failure, the material is said to be brittle.
Malleability is similar, but not identical, as it involves deformation under compression. Gold, for example, is both ductile and malleable, but lead is only malleable.
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