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Title: The influence of uniaxial prestrain on biaxial r-values in 7075-O aluminium alloy

Biaxial test methods have been used to determine, not only yield behaviour under biaxial conditions, but also the strain response. This paper examines the influence of uniaxial prestrain upon the biaxial r-value by extending the disc compression test procedure proposed by Barlat et al. The extension involved the use of digital image measurements of in-plane strains. The material examined was a 7075-O condition aluminium alloy. The results of the experimental programme indicated that the biaxial r-value is unaffected by uniaxial prestrain. When using the disc compression test, the mode of deformation and therefore the biaxial r-value were found to be very sensitive to the prevailing friction conditions.
Authors:
; ; ;  [1]
  1. Advanced Metal Forming Research Group (AMFoR), University of Ulster, Shore Road, Newtownabbey, Co. Antrim BT37 0QB, Northern Ireland (United Kingdom)
Publication Date:
OSTI Identifier:
21516723
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1353; Journal Issue: 1; Conference: ESAFORM 2011: 14. international ESAFORM conference on material forming, Belfast, Northern Ireland (United Kingdom), 27-29 Apr 2011; Other Information: DOI: 10.1063/1.3589718; (c) 2011 American Institute of Physics
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ALUMINIUM ALLOYS; COMPRESSION; DEFORMATION; FRICTION; HARDENING; STRAINS; TESTING ALLOYS