Experimental study of Ni3Al slip traces by atomic force microscopy: an evidence of mobile dislocation exhaustion

2004 ◽  
Vol 387-389 ◽  
pp. 926-930 ◽  
Author(s):  
J. Fikar ◽  
C. Coupeau ◽  
T. Kruml ◽  
J. Bonneville
Keyword(s):  
Experimental Study ◽  
Atomic Force Microscopy ◽  
Mobile Dislocation ◽  
Force Microscopy ◽  
Atomic Force ◽  
Slip Traces

Slip trace characterisation of Ni3Al by atomic force microscopy.

2000 ◽  
Vol 646 ◽  
Author(s):  
Christophe Coupeau ◽  
Tomas Kruml ◽  
Joël Bonneville
Keyword(s):  
Atomic Force Microscopy ◽  
Flow Stress ◽  
Plastic Strain ◽  
Slip System ◽  
Mean Free Path ◽  
Force Microscopy ◽  
Atomic Force ◽  
Slip Traces ◽  
Octahedral Slip ◽  
Increasing Temperature

ABSTRACTWe examined by atomic force microscope the slip traces produced on Ni3Al single crystals pre-deformed up to nearly 1% plastic strain at three temperatures in the anomaly domain: 293K, 500K and 720K. It is observed that, whatever the deformation temperature, the slip traces essentially belong to the primary octahedral slip system. The lengths of the slip lines become shorter and shorter with increasing temperature, while the number of dislocations that constitutes the lines is approximately constant. These results are interpreted in terms of a decreasing mean free path of the mobile dislocations when the temperature is raised. The implications of these results in the understanding of the flow stress anomaly are underscored.

scholarly journals Визуализация проводящих каналов в полимерных слоях методом атомно-силовой микроскопии с проводящим зондом

2021 ◽  
Vol 91 (10) ◽  
pp. 1560
Author(s):  
В.М. Корнилов ◽  
А.Н. Лачинов ◽  
А.Р. Юсупов
Keyword(s):  
Experimental Study ◽  
Atomic Force Microscopy ◽  
Surface Layer ◽  
Supramolecular Structure ◽  
Current Flow ◽  
Electrophysical Properties ◽  
Current Image ◽  
Force Microscopy ◽  
Atomic Force ◽  
Ultrathin Polymer Films

The results of an experimental study of the local electrophysical properties of ultrathin polymer films by atomic force microscopy with a conducting probe are presented. It is established that visualization of current flow sites (conducting channels) is possible in areas from which the surface layer has been mechanically removed. The conducting channels in the current image have the form of individual points with a height corresponding to the locally flowing current. It is found that the location of the observed channels correlates well with the model of conductivity along the grain boundaries of the supramolecular structure of the polymer.

Sign in / Sign up

Export Citation Format

Share Document