Into adjacent positions causing coulombic repulsion

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Unformatted text preview: o-brittle breaking. This temperature (DBTT) The and thus the number of repeated load appli example, the glass at whichwindow is brittle, an ionic solid, in a of metals. Onthe other hand, as illustrated in Figure 2.4–5a, in while the each ion particles embedded in another material, cal temperature in a car 50% of the fracture surface is surroundedplastic bumper is not. More slip may lead tobrittle metalCharpy specimen shows crystallographic like charges moving matrix. energy gap See band gap. or by oppositely charged ions. Thus, ionic precisely, facets. into adjacent positions, causing coulombic repulsion (see Figure 2.4–5b). This makes T by whic engineering strain processhe chang materials more difficult to achieve, and the material responds by breaking. This is the A slipping Alternatively,lowis the temperature corresponding toone compression molding much exhibit a it failure strain. of the reasons why ceramics and oxide glasses fracture easily. Such behavior is known as materialimen or component divided by the is shaped by heating and squeezing Burgers circuitbetween the drawn and upper shelf energies in a A circuit lower around a dislocation midpoint brittle behavior. desired shape between two platens that actf engineering strain at fracture through defect-free material that would normally close if Charpy test. there edge dislocation inside of the circuit. formed were no dislocation A dislocation that is strain polarization A mechanism concentration when failure occurs. – – + + + – + + to low ion Burgers vector b – by+ the insertion of an the end to the engineering stress (figuratively) The vector that joins + extra half– plane into the corrosion rate is reduced due The load – – + rates within the electrolyte. normal to the – – start of –the +Burgers perfect region of a crystal. is an cross-sectional area an otherwise+ circuit. The Burgers vector invariant property –of a dislocation. + – + – + concrete A mixture (or aggregate compow – + + epitaxial growth A process in effective +penetration distance The distance at which containing s...
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This note was uploaded on 02/25/2013 for the course PHYS 2202 taught by Professor Sowell during the Spring '10 term at Georgia Institute of Technology.

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