Accession Number : AD0778743

Title :   Defect Formation during Cold Hydrostatic Extrusion.

Descriptive Note : Technical rept.,


Personal Author(s) : Pepe,Joseph J.

Report Date : APR 1974

Pagination or Media Count : 41

Abstract : To attain the maximum improvement in mechanical properties of hydrostatically extruded components, it is first necessary to fully understand the deformation process and how it affects microstructural events which ultimately control the subsequent ductility of the deformed product. Using hydrostatic extrusion as a laboratory tool, the origin of microscopic defects from both tensile and shear stress-states and the interaction of these defects with the subsequent fracture characteristics of the deformed product are discussed. Recent findings concerned with the origin of microscopic fractures such ascentral bursts and fir-tree cracking are also presented. (Author)

Descriptors :   *Extrusion, *Defects(Materials), *Fracture(Mechanics), Hydrostatic pressure, Metals, Microstructure, Crack propagation, Deformation

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE