ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The overall plastic behavior of polycrystalline materials strongly depends on themicrostructure and on the local rheology of individual grains. The characterization of the strain andstress heterogeneities within the specimen, which result from the intergranular mechanicalinteractions, is of particular interest since they largely control the microstructure evolutions such astexture development, work-hardening, damage, recrystallization, etc. The influence ofmicrostructure on the effective behavior can be addressed by physical-based predictive models(homogenization schemes) based either on full-field or on mean-field approaches. But these modelsrequire the knowledge of the grain behavior, which in turn must be determined on the real specimenunder investigation. The microextensometry technique allows the determination of the surface total(i.e. plastic + elastic) strain field with a micrometric spatial resolution. On the other hand, the whitebeam X-ray microdiffraction technique developed recently at the Advanced Light Source enablesthe determination of the elastic strain with the same spatial resolution. For polycrystalline materialswith grain size of about 10 micrometers, a complete intragranular mechanical characterization canthus be performed by coupling these two techniques. The very first results obtained on plasticallydeformed copper and zirconium specimens are presented
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/13/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.524-525.103.pdf
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