Analysis of the Effect of Strain Hardening on Central Bursting Defects in Drawing and Extrusion

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  • Z. Zimerman
    Homer Research Laboratories, Bethlehem Steel Corporation, Bethlehem, Pa.
  • B. Avitzur
    Department of Metallurgy and Materials Science, Lehigh University, Bethlehem, Pa.

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<jats:p>Central bursting defects in a strain-hardening material are analyzed. A criterion has been derived for the conditions that promote these defects, as a function of the coefficient of strain hardening, the percent reduction, the die semicone angle, and the coefficient of friction. The criterion was experimentally verified for homogeneous materials.</jats:p>

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