A method for finding critical stresses of dislocation movement

1977 ◽  
Vol 31 (3) ◽  
pp. 139-141 ◽  
Author(s):  
S. M. Hu
Keyword(s):  
Critical Stresses ◽  
Dislocation Movement

CENTRALLOY G4879 MICRO

Alloy Digest ◽  
2013 ◽  
Vol 62 (5) ◽  
Keyword(s):  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Nickel Alloy ◽  
High Temperature Properties ◽  
Uniform Dispersion ◽  
Dislocation Movement

Abstract Centralloy G4879 Micro is a cast nickel alloy with very good high-temperature properties. The alloy has carbides in a uniform dispersion that impede dislocation movement. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on casting, machining, and joining. Filing Code: Ni-708. Producer or source: Schmidt & Clemens Inc..

Effect of Structure on the Critical Stresses and Strains in Titanium Nickelide-Based Alloys

2020 ◽  
Vol 2020 (7) ◽  
pp. 760-766
Author(s):  
M. Yu. Kollerov ◽  
D. E. Gusev ◽  
M. B. Afonina ◽  
R. E. Vinogradov
Keyword(s):  
Titanium Nickelide ◽  
Critical Stresses ◽  
Effect Of Structure

scholarly journals Numerical Study and Experimental Validation of Deformation of FCC CuAl Single Crystal Obtained by Additive Manufacturing

Metals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 582
Author(s):  
Anton Y. Nikonov ◽  
Andrey I. Dmitriev ◽  
Dmitry V. Lychagin ◽  
Lilia L. Lychagina ◽  
Artem A. Bibko ◽  
...  
Keyword(s):  
Single Crystal ◽  
Numerical Study ◽  
Strain Curve ◽  
Aluminum Bronze ◽  
Partial Dislocations ◽  
Slip Planes ◽  
Loaded Material ◽  
Dislocation Movement ◽  
Dynamics Simulations ◽  
Experimental Findings

The importance of taking into account directional solidification of grains formed during 3D printing is determined by a substantial influence of their crystallographic orientation on the mechanical properties of a loaded material. This issue is studied in the present study using molecular dynamics simulations. The compression of an FCC single crystal of aluminum bronze was performed along the <111> axis. A Ni single crystal, which is characterized by higher stacking fault energy (SFE) than aluminum bronze, was also considered. It was found that the first dislocations started to move earlier in the material with lower SFE, in which the slip of two Shockley partials was observed. In the case of the material with higher SFE, the slip of a full dislocation occurred via successive splitting of its segments into partial dislocations. Regardless of the SFE value, the deformation was primarily occurred by means of the formation of dislocation complexes involved stair-rod dislocations and partial dislocations on adjacent slip planes. Hardening and softening segments of the calculated stress–strain curve were shown to correspond to the periods of hindering of dislocations at dislocation pileups and dislocation movement between them. The simulation results well agree with the experimental findings.

Dislocation movement and hysteresis in Maraging blades

2009 ◽  
Vol 26 (20) ◽  
pp. 204018 ◽  
Author(s):  
Arianna Di Cintio ◽  
Fabio Marchesoni ◽  
Maria Ascione ◽  
Abhik Bhawal ◽  
Riccardo De Salvo
Keyword(s):  
Dislocation Movement

Efficient identification of critical stresses in structures subject to dynamic loads

1986 ◽  
Vol 22 (3) ◽  
pp. 373-386 ◽  
Author(s):  
Ramana V Grandhi ◽  
Raphael T Haftka ◽  
Layne T Watson
Keyword(s):  
Dynamic Loads ◽  
Critical Stresses

Critical stresses in rolling contact fatigue

Wear ◽  
1981 ◽  
Vol 71 (3) ◽  
pp. 265-282 ◽  
Author(s):  
N.G. Popinceanu ◽  
E. Diaconescu ◽  
S. Cretu
Keyword(s):  
Rolling Contact Fatigue ◽  
Contact Fatigue ◽  
Rolling Contact ◽  
Critical Stresses

scholarly journals Анализ скоростных зависимостей критических напряжений в алюминиевых сплавах системы Al-Mg при ударных нагрузках

2020 ◽  
Vol 62 (11) ◽  
pp. 1749
Author(s):  
А.Д. Евстифеев ◽  
И.В. Смирнов ◽  
Ю.В. Петров
Keyword(s):  
Corrosion Resistance ◽  
Aluminum Alloys ◽  
Strain Rate ◽  
Slight Reduction ◽  
Dynamic Stresses ◽  
Good Ductility ◽  
Critical Stresses ◽  
Critical Dynamic ◽  
Strain Rate Loading ◽  
Alloys Of The Al

Aluminum alloys of the Al-Mg system are widely used in automotive and aviation industries due to their combination of strength, good ductility and corrosion resistance. Increasing the percentage of magnesium leads to higher strength of the material with a slight reduction of ductility. Behavior of critical stresses in materials were studied under variable strain rate loading conditions. The possibility to predict critical dynamic stresses of materials based on a structural-time approach is discussed.

scholarly journals Critical Stresses in Materials with Cracks

2019 ◽  
Vol 70 (7) ◽  
pp. 2442-2446
Author(s):  
Simona Eugenia Manea ◽  
Vali Ifigenia Nicolof ◽  
Teodor Sima
Keyword(s):  
Fracture Mechanics ◽  
Critical Stress ◽  
Crack Width ◽  
Crack Depth ◽  
Equivalent Stress ◽  
Critical Energy ◽  
Material Behavior ◽  
Experimental Results ◽  
Critical Stresses ◽  
Mechanics Concepts

The fracture mechanics concepts, as well as the concepts introduced on the basis of principle of critical energy, correlated with strength of materials with cracks is analysed. The equivalent stress method of strength was applied to cracked materials, by using the concept of local critical stress. This one depends on the material behavior and the deterioration due to crack. Experimental results have been obtained with specimens of OL304 steel with different cracks. The influence of crack depth and crack width is put into evidence.

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