MICROPLASTICITY OF MMC - EXPERIMENTAL RESULTS AND MODELING

Citation
E. Maire et al., MICROPLASTICITY OF MMC - EXPERIMENTAL RESULTS AND MODELING, Journal de physique. IV, 3(C7), 1993, pp. 1849-1852
Citations number
6
Categorie Soggetti
Physics
Journal title
ISSN journal
11554339
Volume
3
Issue
C7
Year of publication
1993
Part
3
Pages
1849 - 1852
Database
ISI
SICI code
1155-4339(1993)3:C7<1849:MOM-ER>2.0.ZU;2-D
Abstract
The microplastic behavior of several MMC is investigated by means of t ension and compression tests. This behavior is assymetric : the propor tional limit is higher in tension than in compression but the work har dening rate is higher In compression. These differences ate analysed i n terms of maxium of the Tresca's shear stress at the interface (propo rtional limit) and of the emission of dislocation loops during the coo ling (work hardening rate). On another hand, a model is proposed to ca lculate the value of the yield stress, describing the composite as a m aterial composed of three phases : inclusion, unaffected matrix and ma trix surrounding the inclusion having a gradient in the density of the thermally induced dilocations.