A New Insight in the Plasticity of Ni3Al Intermetallic Compounds Using AFM Observations

2011 ◽  
Vol 465 ◽  
pp. 403-406 ◽  
Author(s):  
Joël Bonneville ◽  
Christophe Coupeau ◽  
Dimitri Charrier
Keyword(s):  
Atomic Force Microscopy ◽  
Flow Stress ◽  
Temperature Dependence ◽  
Intermetallic Compounds ◽  
Trace Analysis ◽  
Cross Slip ◽  
Positive Temperature ◽  
Force Microscopy ◽  
Atomic Force ◽  
Slip Traces

The positive temperature dependence of flow stress in Ni3Al is examined through fine slip trace analysis performed by atomic force microscopy. Slip traces, which result from dislocation movements, constitute outstanding markers for investigating the elementary dislocation mechanisms that control plasticity. The experiments were performed on two Ni3Al-base alloys, with Ta or Hf as additional elements. The results give evidence that the anomaly domain is accompanied by a drastic exhaustion of mobile dislocations and very short cross-slip distances on the cube cross-slip plane.

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.

Contribution of AFM Observations to the Understanding of Ni3Al Yield Stress Anomaly

2011 ◽  
Vol 61 ◽  
pp. 71-77
Author(s):  
Joël Bonneville ◽  
Dimitri Charrier ◽  
Christophe Coupeau
Keyword(s):  
Atomic Force Microscopy ◽  
Yield Stress ◽  
Intermetallic Compounds ◽  
Ordered Structure ◽  
Practical Situation ◽  
Force Microscopy ◽  
Atomic Force ◽  
Ni3al Intermetallic

We report in the present paper a practical situation where the use of atomic force microscopy allowed an irrefutable insight in material plasticity for discriminating between different modelling hypotheses concerning the yield stress anomaly of Ni3Al intermetallic compounds with the L12 ordered structure. The contribution of AFM to a better understanding of elementary rate controlling mechanisms as well as collective dislocation motions is highlighted.

scholarly journals The temperature dependence of cell mechanics measured by atomic force microscopy

2009 ◽  
Vol 6 (2) ◽  
pp. 025009 ◽  
Author(s):  
R Sunyer ◽  
X Trepat ◽  
J J Fredberg ◽  
R Farré ◽  
D Navajas
Keyword(s):  
Atomic Force Microscopy ◽  
Temperature Dependence ◽  
Cell Mechanics ◽  
Force Microscopy ◽  
Atomic Force

scholarly journals In situgeneration and atomic scale imaging of slip traces with atomic force microscopy

1997 ◽  
Vol 68 (12) ◽  
pp. 4492-4497 ◽  
Author(s):  
W. F. Oele ◽  
J. W. J. Kerssemakers ◽  
J. Th. M. De Hosson
Keyword(s):  
Atomic Force Microscopy ◽  
Atomic Scale ◽  
Force Microscopy ◽  
Atomic Force ◽  
Slip Traces

Atomic force microscopy monitoring of the temperature dependence of the cytochrome BM3 oligomeric state

BIOPHYSICS ◽  
2015 ◽  
Vol 60 (1) ◽  
pp. 66-72 ◽  
Author(s):  
N. S. Bukharina ◽  
Yu. D. Ivanov ◽  
T. O. Pleshakova ◽  
P. A. Frantsuzov ◽  
N. D. Ivanova ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Temperature Dependence ◽  
Oligomeric State ◽  
Force Microscopy ◽  
Atomic Force
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