Influence of loading cycle on the crack resistance characteristics of steels. Report 2

1980 ◽  
Vol 12 (12) ◽  
pp. 1477-1480
Author(s):  
V. T. Troshchenko ◽  
V. V. Pokrovskii
Keyword(s):  
Crack Resistance ◽  
Loading Cycle

Effect of loading-cycle asymmetry on the crack resistance of structural alloys

1982 ◽  
Vol 14 (11) ◽  
pp. 1456-1461
Author(s):  
P. V. Yasnii ◽  
V. V. Pokrovskii ◽  
V. T. Kaplunenko ◽  
M. V. Avanesov ◽  
B. T. Timofeev ◽  
...  
Keyword(s):  
Crack Resistance ◽  
Cycle Asymmetry ◽  
Loading Cycle

Influence of temperature and loading cycle asymmetry on the crack resistance characteristics of heat-resistant steels

1983 ◽  
Vol 15 (8) ◽  
pp. 1035-1046
Author(s):  
V. T. Troshchenko ◽  
V. V. Pokrovskii ◽  
P. V. Yasnii ◽  
Yu. S. Skorenko ◽  
M. Klesnil ◽  
...  
Keyword(s):  
Crack Resistance ◽  
Cycle Asymmetry ◽  
Influence Of Temperature ◽  
Loading Cycle ◽  
Heat Resistant ◽  
Heat Resistant Steels

Effect of Plastic Deformation on Hydrogen Induced Crack Resistance of API X65 Linepipe Steel

2016 ◽  
Vol 54 (4) ◽  
pp. 295-303 ◽  
Author(s):  
Kyung-Mox Cho ◽  
Joon-Ho Sung ◽  
Yun-Kyu Kim ◽  
Jong-Geol Moon ◽  
Ki-Won Kim ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Crack Resistance ◽  
Linepipe Steel

Features of the kinetics of cyclic elastoplastic deformation diagrams at dwells in cycles and superimposition of variable stresses on them

2020 ◽  
Vol 86 (12) ◽  
pp. 46-53
Author(s):  
M. M. Gadenin
Keyword(s):  
Experimental Data ◽  
Elastoplastic Deformation ◽  
Low Cycle Fatigue ◽  
Cycle Fatigue ◽  
Loading Cycle ◽  
Additional Variable ◽  
Dynamic Creep ◽  
Variable Stresses ◽  
Kinetics Of ◽  
Deformation Diagrams

The goal of the study is determination of the regularities of changes in cyclic strains and related deformation diagrams attributed to the existence of time dwells in the loading modes and imposition of additional variable stresses on them. Analysis of the obtained experimental data on the kinetics of cyclic elastoplastic deformation diagrams and their parameters revealed that in contrast to regular cyclic loading (equal in stresses), additional deformations of static and dynamic creep are developed. The results of the studys are especially relevant for assessing the cyclic strength of unique extremely loaded objects of technology, including nuclear power equipment, units of aviation and space systems, etc. The experiments were carried out on the samples of austenitic stainless steel under low-cycle loading and high temperatures of testing. Static and dynamic creep deformations arising under those loading conditions promote an increase in the range of cyclic plastic strain in each loading cycle and also stimulate an increase in the range of elastoplastic strain due to active cyclic deformation. At the same time the existence of dwells on extrema of stresses in cycles without imposition of additional variable stresses on them most strongly affects the growth of plastic strain ranges in cycles. Imposition of additional variable stresses on dwells also results in the development of creep strains, but their growth turns out to be somewhat less than in the presence of dwells without stresses imposed. The diagrams of cyclic deformation obtained in the experiments are approximated by power dependences, their kinetics being described in terms of the number of loading cycles using corresponding temperature-time functions. At the same time, it is shown that increase in the cyclic plastic deformation for cycles with dwells and imposition of additional variable stresses on them decreases low cycle fatigue life compared to regular loading without dwells at the same stress amplitudes, moreover, the higher the values of static and dynamic creep, the greater decrease in low-cycle fatigue life. This conclusion results from experimental data and analysis of conditions of damage accumulation for the considered forms of the loading cycle using the deformation criterion of reaching the limit state leading to fracture.

Complex study of the fracture processes in materials and structures

2018 ◽  
Vol 84 (11) ◽  
pp. 46-51 ◽  
Author(s):  
N. A. Makhutov
Keyword(s):  
Fracture Mechanics ◽  
Crack Resistance ◽  
Scientific Basis ◽  
Intensity Factors ◽  
Nonlinear Fracture Mechanics ◽  
Nonlinear Fracture ◽  
Linear Fracture ◽  
Science Technology ◽  
Fracture Processes

The results of comprehensive studies of multifactor processes, mechanisms and criteria for fracture at a variation of the crack-like defect state, loading conditions and mechanical properties of structural materials carried out in the 20th - 21st centuries are presented on the basis of monographic publications and articles published in the journal “Zavodskaya Laboratoriya. Diagnostika Materialov.” Crack resistance of materials and structures has become a key problem of the material science, technology, design, manufacture and service of structures. Fracture mechanics including estimation of the stress-strain and limiting states in a cracks tip formed a scientific basis of the crack resistance analysis Stress intensity factors (linear fracture mechanics) and strain intensity factors (nonlinear fracture mechanics) are accepted as the basic criteria of those states. The basic computational relations for construction of the fracture diagrammes which link the cracks growth with conditions of a static, cyclic, long-term, dynamic loading are presented. Parameters of computational relations are put into correspondence with the features of fracture processes on nano-, micro-, meso- and macrolevels. Prospects of the research and guidelines of further studing crack resistance are discussed.

The relationship of crack resistance and structure of a heat-affected zone of welded pipe joints

2018 ◽  
Vol 8 (2) ◽  
pp. 154-160
Author(s):  
Svetlana N. Zueva ◽  
◽  
Sergey V. Soya ◽  
Olga A. Zadubrovskaya ◽  
◽  
...  
Keyword(s):  
Crack Resistance ◽  
Heat Affected Zone ◽  
Pipe Joints ◽  
Welded Pipe ◽  
Relationship Of ◽  
The Relationship

Analysis of Crack Resistance of Interfaces between Materials

2020 ◽  
Vol 55 (4) ◽  
pp. 536-551
Author(s):  
M. N. Perelmuter
Keyword(s):  
Crack Resistance

TRIBALOY ALLOY T-900

Alloy Digest ◽  
1996 ◽  
Vol 45 (10) ◽  
Keyword(s):  
Wear Resistance ◽  
Crack Resistance ◽  
Base Alloy ◽  
Corrosion And Wear ◽  
Laves Phase ◽  
Preheat Temperature ◽  
Corrosion Resistant ◽  
Cobalt Base Alloy ◽  
Cobalt Base

Abstract Tribaloy alloy T-900 is a cobalt-base alloy derived from an alloy family originally developed by DuPont. Excessive amounts of molybdenum and silicon induce the formatin during solidification of a hard and corrosion-resistant intermetallic coumpound, known as Laves phase. This alloy had improved crack resistance and a lower preheat temperature compared with Tribaloy T-800 (Alloy Digest Co-99, September 1996). This datasheet provides information on composition, microstructure, and hardness. It also includes information on corrosion and wear resistance. Filing Code: CO-100. Producer or source: Stoody Deloro Stellite Inc.

scholarly journals Experimental Research on Crack Resistance of Fiber Asphalt Mixture in Cold Area

2021 ◽  
Vol 791 (1) ◽  
pp. 012072
Author(s):  
Bo Peng ◽  
Shuai Liu ◽  
Wenying Li ◽  
Jingwen Peng ◽  
Yilang Li ◽  
...  
Keyword(s):  
Crack Resistance ◽  
Experimental Research ◽  
Asphalt Mixture ◽  
Cold Area

scholarly journals Correction to: Enhancement of the Crack Resistance of Si36N4 −Y2O3 Ceramics and Its Structural and Metallurgical Aspects

2021 ◽  
Author(s):  
B. D. Vasyliv ◽  
O. M. Romaniv ◽  
I. V. Zalite ◽  
M. I. Yurkevieh
Keyword(s):  
Crack Resistance
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