Accession Number : AD0740887


Title :   Study of Deformation and Defects Occurrence in Advanced Forging Technique


Descriptive Note : Technical rept. Feb-Dec 1970


Corporate Author : CALIFORNIA UNIV BERKELEY


Personal Author(s) : Kobayashi, Shiro ; Sohrabpour, S ; Sehgal, M M


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/740887.pdf


Report Date : Sep 1971


Pagination or Media Count : 113


Abstract : A two-part investigation was performed to study the relationship between defects formation and deformation characteristics in plane-strain side- pressing and axisymmetric plastic indentation. In the first part, the investigation was undertaken to examine the detailed deformation characteristics involved in axisymmetric plastic indentation. Circular punches with flat and hemispherical ends were indented into specimens prepared from SAE 1215 steels under as-received and annealed conditions. In the second part, the detailed mechanics of the side-pressing of circular cylinders under plane-strain conditions were obtained, based on the observed flow patterns of commercially pure aluminum and copper specimens. Slip-line fields and corresponding hodographs were constructed, and stress calculations were made, taking into account the actual material properties.


Descriptors :   *STEEL , *FORGING , DEFORMATION , CYLINDRICAL BODIES , ALUMINUM , COPPER , MECHANICS , STRAIN(MECHANICS)


Subject Categories : Metallurgy and Metallography
      Fabrication Metallurgy


Distribution Statement : APPROVED FOR PUBLIC RELEASE