Title of article :
Dislocation structures and mechanical behaviour of Ge single crystals deformed by compression
Author/Authors :
Nyilas، نويسنده , , K. and Dupas، نويسنده , , C. and Kruml، نويسنده , , T. and Zsoldos، نويسنده , , L. and Ungلr، نويسنده , , T. and Martin، نويسنده , , J.L.، نويسنده ,
Pages :
4
From page :
25
To page :
28
Abstract :
Stress–strain curves of germanium interrupted by dip tests reveal that the internal stresses ascend parallel to the applied stress in a strain-rate dependent way. To understand this peculiar behaviour, the dislocation microstructure has been characterized. Transmission electron microscopy images show that regions of high dislocation activity along the primary slip system are separated by dislocation-free zones. X-ray microdiffraction reveals that the dislocation density is fluctuating on a 100 μm scale. X-ray reciprocal-space mapping, together with scanning microdiffraction, shows that misoriented mosaic blocks are forming owing to the boundary conditions in the compression test. These preliminary results reveal deformation heterogeneity both at macroscopic and mesoscopic scales.
Keywords :
Plasticity of Ge , X-ray microdiffraction , Heterogeneous microstructures
Journal title :
Astroparticle Physics
Record number :
2066198
Link To Document :
بازگشت