Effective structural unit size in titanium alloys

This paper introduces the concept of effective structural size in titanium alloys and its importance with respect to material production routes and component lifing/design. Traditionally, process route optimization has relied on optical microscopy, which may be misleading when predicting mechanical...

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Bibliographic Details
Published in:Journal of strain analysis for engineering design 2007-05, Vol.42 (4), p.269-279
Main Authors: Rugg, D, Dixon, M, Dunne, F. P. E
Format: Article
Language:English
Subjects:
Continuum mechanics
Crystal structure
Data analysis
Design analysis
Design optimization
Empirical analysis
Mathematical models
Mechanical properties
Optical microscopy
Optical properties
Plastic properties
Route optimization
Size
Sound
Strain
Stresses
Titanium alloys
Titanium base alloys
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Summary:This paper introduces the concept of effective structural size in titanium alloys and its importance with respect to material production routes and component lifing/design. Traditionally, process route optimization has relied on optical microscopy, which may be misleading when predicting mechanical properties. Similarly, continuum mechanics and current lifing methods are based on empirical data analysis. The advent of advanced material characterization techniques, e.g. EBSD combined with crystal plasticity modelling, has the potential to provide the next generation of mechanistically sound methods that more accurately predict material behaviour in complex loading regimes. These benefits are reviewed in the context of industrial application. Crystal plasticity modelling techniques are presented and a particular structural unit - termed a rogue grain - in a model single-phase titanium alloy is considered. Cold dwell under both strain and stress control is then assessed in the structural unit.
ISSN:0309-3247
2041-3130
DOI:10.1243/03093247JSA273