INVESTIGATION OF STRAIN INHOMOGENEITy IN HExA-ECAP PROCESSED AA7075


ÖĞÜT S. , KAYA H., KENTLİ A. , ÖZBEYAZ K. , Sahbaz M., UÇAR M.

ARCHIVES OF METALLURGY AND MATERIALS, vol.66, no.2, pp.431-436, 2021 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 66 Issue: 2
  • Publication Date: 2021
  • Doi Number: 10.24425/amm.2021.135875
  • Title of Journal : ARCHIVES OF METALLURGY AND MATERIALS
  • Page Numbers: pp.431-436

Abstract

Severe Plastic Deformation (SPD) techniques have been used by researchers for last three decades in order to obtain UltraFine Grained (UFG) materials. Equal Channel Angular Pressing (ECAP) is preferred more than other SPD techniques thanks to its high performance and practicability. Hexa Equal Channel Angular Pressing (Hexa-ECAP) - modified ECAP technique which enables to apply ECAP routes for cylindrical samples properly - was preferred in this study. Within the objective of this study, the effects of coefficient and ram velocity on the mean effective strain and strain inhomogeneity of Hexa-ECAP processed Al7075 aluminium alloy were investigated. Also, the effects of ram velocity and friction coefficient on hardness homogeneity were investigated benefitting from the similarity between the hardness distribution and the strain distribution.