Asymmetric slip trace formation in tension/compression cyclic deformation of biomedical Co–Cr–Mo–N alloy with negative stacking fault energy

2014 ◽  
Vol 74 ◽  
pp. 52-55 ◽  
Author(s):  
Takuya Mitsunobu ◽  
Yuichiro Koizumi ◽  
Byoung-Soo Lee ◽  
Akihiko Chiba
Keyword(s):  
Cyclic Deformation ◽  
Stacking Fault ◽  
Stacking Fault Energy ◽  
Slip Trace ◽  
Trace Formation

On effects of non-systematic reflections on weak-beam images of partial dislocations

1991 ◽  
Vol 49 ◽  
pp. 688-689
Author(s):  
K. Z. Botros ◽  
S. S. Sheinin
Keyword(s):  
High Precision ◽  
Stacking Fault ◽  
Important Application ◽  
Stacking Fault Energy ◽  
Sharp Peak ◽  
Weak Beam ◽  
Partial Dislocations ◽  
Deviation Parameter ◽  
Beam Diffraction

The main features of weak beam images of dislocations were first described by Cockayne et al. using calculations of intensity profiles based on the kinematical and two beam dynamical theories. The feature of weak beam images which is of particular interest in this investigation is that intensity profiles exhibit a sharp peak located at a position very close to the position of the dislocation in the crystal. This property of weak beam images of dislocations has an important application in the determination of stacking fault energy of crystals. This can easily be done since the separation of the partial dislocations bounding a stacking fault ribbon can be measured with high precision, assuming of course that the weak beam relationship between the positions of the image and the dislocation is valid. In order to carry out measurements such as these in practice the specimen must be tilted to "good" weak beam diffraction conditions, which implies utilizing high values of the deviation parameter Sg.

Structural features and strength behavior of TRIP/TWIP steels

2020 ◽  
pp. 5-18
Author(s):  
D. V. Prosvirnin ◽  
◽  
M. S. Larionov ◽  
S. V. Pivovarchik ◽  
A. G. Kolmakov ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Chemical Composition ◽  
Thermomechanical Processing ◽  
Maximum Load ◽  
Structural Features ◽  
Stacking Fault ◽  
Stacking Fault Energy ◽  
Structural And Functional Properties ◽  
Twip Steels ◽  
The Creation

A review of the literature data on the structural features of TRIP / TWIP steels, their relationship with mechanical properties and the relationship of strength parameters under static and cyclic loading was carried out. It is shown that the level of mechanical properties of such steels is determined by the chemical composition and processing technology (thermal and thermomechanical processing, hot and cold pressure treatment), aimed at achieving a favorable phase composition. At the atomic level, the most important factor is stacking fault energy, the level of which will be decisive in the formation of austenite twins and / or the formation of strain martensite. By selecting the chemical composition, it is possible to set the stacking fault energy corresponding to the necessary mechanical characteristics. In the case of cyclic loads, an important role is played by the strain rate and the maximum load during testing. So at high loading rates and a load approaching the yield strength under tension, the intensity of the twinning processes and the formation of martensite increases. It is shown that one of the relevant ways to further increase of the structural and functional properties of TRIP and TWIP steels is the creation of composite materials on their basis. At present, surface modification and coating, especially by ion-vacuum methods, can be considered the most promising direction for the creation of such composites.

scholarly journals A theoretical calculation of stacking fault energy of Ni alloys: The effects of temperature and composition

2021 ◽  
Vol 191 ◽  
pp. 110326
Author(s):  
Mohammad S. Dodaran ◽  
Shengmin Guo ◽  
Michael M. Khonsari ◽  
Nima Shamsaei ◽  
Shuai Shao
Keyword(s):  
Theoretical Calculation ◽  
Stacking Fault ◽  
Stacking Fault Energy ◽  
Ni Alloys ◽  
Effects Of Temperature

scholarly journals Can experiment determine the stacking fault energy of metastable alloys?

2021 ◽  
Vol 199 ◽  
pp. 109396
Author(s):  
Xun Sun ◽  
Song Lu ◽  
Ruiwen Xie ◽  
Xianghai An ◽  
Wei Li ◽  
...  
Keyword(s):  
Stacking Fault ◽  
Stacking Fault Energy ◽  
Metastable Alloys
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