Deformation and Fracture of Materials

2019 ◽  
Keyword(s):  
Deformation And Fracture ◽  
Fracture Of Materials

Effects of Nonlinear Stress-Strain Rate Relation on Deformation and Fracture of Materials in Creep Range

1979 ◽  
Vol 101 (4) ◽  
pp. 369-373 ◽  
Author(s):  
Ryuichi Ohtani ◽  
Shuji Taira
Keyword(s):  
High Temperature ◽  
Industrial Development ◽  
Practical Investigations ◽  
High Temperature Strength ◽  
Stress Strain ◽  
Stress Strain Relation ◽  
Deformation And Fracture ◽  
Nonlinear Stress ◽  
Fracture Of Materials ◽  
Rate Relation

Fundamental and practical investigations on high-temperature strength of materials have made significant contributions to industrial development for the last twenty-five years. However, an additional effort is required to make clear the effects of dominant factors on the deformation and fracture of materials, since the knowledge obtained to date are not enough to explain the overall phenomena of high temperature strength. In this paper the importance of the effects of nonlinearlity and time-dependence of stress-strain relation on the well-known creep behaviors are reviewed and reexamined on the basis of our laboratory study conducted over the last twenty years.

Aggregatization of Frenckel Defects in Ni and Intermetallide Ni3Al

2007 ◽  
Vol 567-568 ◽  
pp. 165-168 ◽  
Author(s):  
Mikhail D. Starostenkov ◽  
Nikolay Medvedev ◽  
Olga Pozhidaeva
Keyword(s):  
Molecular Dynamics ◽  
Point Defects ◽  
External Influence ◽  
Comparison Analysis ◽  
Deformation And Fracture ◽  
Interstitial Atoms ◽  
Fracture Of Materials

The formation of Frenckel pairs - vacancies and interstitial atoms takes place during external high energetical influence. The accumulation and aggregatization of point defects is noticed only at definite conditions. Vacancies form volume vacancy tetrahedrons and interstitial atoms form segregations. The conditions of the formation of point defects complexes on the basis of Frenckel pairs were studied by the methods of molecular dynamics in the dependence on temperature and intensity of external influence. Their possible role in the process of deformation and fracture of materials under study were evaluated. Comparison analysis of their stability was made for clusters of interstitial atoms. When the cluster had about 130 interstitial atoms, crowdion complexes were energetically profitable.

Simulation of elastic–plastic deformation and fracture of materials at micro-, meso- and macrolevels

2001 ◽  
Vol 37 (1-3) ◽  
pp. 183-244 ◽  
Author(s):  
P.V. Makarov ◽  
S. Schmauder ◽  
O.I. Cherepanov ◽  
I.Yu. Smolin ◽  
V.A. Romanova ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Elastic Plastic ◽  
Deformation And Fracture ◽  
Fracture Of Materials
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