Yielding in notch tensile specimens with graded microstructures

F. Bohner, J. K. Gregory, U. Weber, S. Schmauder

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Graded microstructures were generated in notched tensile specimens of an age-hardenable titanium alloy in order to tailor the local resistance to plastic deformation to the expected local degree of mechanical loading. Experiments verified that the local strength increase in the notch root causes the proportional limit (as measured macroscopically in a tensile test) to increase. This result can be explained using a local stress approach. Based on the flow curves for un-notched specimens of a reference (non-graded) material and an empirical correlation between yield stress and microhardness, the flow curves of the graded notched specimens could be successfully predicted using finite element analysis.

Original languageEnglish
Pages (from-to)627-636
Number of pages10
JournalMechanics of Materials
Volume31
Issue number10
DOIs
StatePublished - Oct 1999

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