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strain hardening

noun

work hardening

noun
1.
the toughening or strengthening of a metal by cold-working or another mechanical process.
Also called strain hardening.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for strain-hardening

strain hardening

noun
1.
a process in which a metal is permanently deformed in order to increase its resistance to further deformation
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Encyclopedia Article for strain-hardening

work hardening

in metallurgy, increase in hardness of a metal induced, deliberately or accidentally, by hammering, rolling, drawing, or other physical processes. Although the first few deformations imposed on metal by such treatment weaken it, its strength is increased by continued deformations. The reason for this seeming paradox lies in the crystalline structure of metal. As stresses are exerted, the crystals slip against each other; but, because of the complexity of the crystal structure, the more such slips are multiplied, the more they tend to place obstacles in the way of further slippage, because the various dislocation lines crisscross each other. See also tempering.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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