Structural sensitivity of the cyclic crack resistance of rotor steel in gaseous hydrogen

1985 ◽  
Vol 20 (5) ◽  
pp. 424-429
Author(s):  
O. N. Romaniv ◽  
G. N. Nikiforchin ◽  
L. Yu. Kozak
Keyword(s):  
Crack Resistance ◽  
Cyclic Crack Resistance ◽  
Gaseous Hydrogen ◽  
Rotor Steel ◽  
Structural Sensitivity

Cyclic crack resistance of constructional steels in gaseous hydrogen

1987 ◽  
Vol 22 (5) ◽  
pp. 439-450 ◽  
Author(s):  
O. N. Romaniv ◽  
G. N. Nikiforchin ◽  
L. Yu. Kozak
Keyword(s):  
Crack Resistance ◽  
Cyclic Crack Resistance ◽  
Gaseous Hydrogen

Cyclic crack resistance of rotor steel as a function of loading conditions

1987 ◽  
Vol 29 (4) ◽  
pp. 266-269 ◽  
Author(s):  
A. I. Balitskii ◽  
Yu. A. Boichenko ◽  
A. V. Sosnin ◽  
N. A. Shokov
Keyword(s):  
Crack Resistance ◽  
Cyclic Crack Resistance ◽  
Rotor Steel ◽  
Loading Conditions

scholarly journals Low and high cycle fatigue of heat resistant steels and nickel based alloys in hydrogen for gas, steam turbines and generators applications

2018 ◽  
Vol 165 ◽  
pp. 05002
Author(s):  
Alexander Balitskii ◽  
Jacek Eliasz ◽  
Valentina Balitska
Keyword(s):  
Hydrogen Pressure ◽  
Low Cycle Fatigue ◽  
Cyclic Crack Resistance ◽  
Rotor Steel ◽  
Cycle Fatigue ◽  
Steam Turbines ◽  
Heat Resistant ◽  
Short Term Strength ◽  
Strength And Plasticity ◽  
Heat Resistant Steels

It has been established that, at some region of hydrogen pressure and strain rate exists a maximum influence of hydrogen on the plasticity, low cycle fatigue and cyclic crack resistance of Ni-Co alloys and high nitrogen steels. The drop of plasticity of the dispersion-hardening materials within the temperature range of intense phase transformations is caused by the localization of strains on the grain boundaries due to the intense redistribution of alloying elements in the boundary regions. Moreover, the increase in plasticity observed at higher temperatures is caused both by partial coagulation of hardening phases and possible dissolution of small amounts of finely divided precipitations. The effect hydrogen on short-term strength and plasticity, high- and low-cycle durability of 15Cr12Ni2MoNMoWNb martensitic steel, 10Cr15Ni27Ti3W2BMo austenitic dispersion-hardened steel, heat resistant 3,5NiCrMoV rotor steel, 04Kh16Ni56Nb5Mo5TiAl and 05Kh19Ni55Nb2Mo9Al Ni-base superalloys in range of pressures 0–30 MPa and temperatures 293–1073 K was investigated. In the case of 15Cr12Ni2MoNMoWNb steel and 04Kh16Ni56Nb5Mo5TiAl alloy the dependence of low-cycle durability (N) and characteristics of plasticity (δ and φ) on the hydrogen pressure consists of two regions. In the first region (low pressures), the N, δ and φ abruptly drops, and in the second, the negative action of hydrogen becomes stable or decrease negligibility.

scholarly journals CRACK RESISTANCE OF BABBIT B83

2017 ◽  
Vol 2017 (1) ◽  
pp. 91-102 ◽  
Author(s):  
Михаил Зернин ◽  
Mikhail Zernin
Keyword(s):  
Finite Element ◽  
Stress Intensity ◽  
Crack Resistance ◽  
Stress Intensity Factors ◽  
Cyclic Crack Resistance ◽  
Intensity Factors ◽  
Finite Element Procedure ◽  
Crack Resistance Test ◽  
Definition Of ◽  
Fracture Viscosity

Babbit 83 crack resistance test in accordance with SSR 25-506-85 was carried out. By finite element method there were defined values of stress intensity factors in flat samples with a grown crack. The fracture viscosity characteristics of babbit are obtained. On the basis of a macro-fractographic analysis of wear fractures of a babbit sample and a finite element procedure for the definition of values of stress intensity factors the cha-racteristics of cyclic crack resistance are obtained. It is shown that a final fracture is realized at 3 МПа , and a transition from an elastic stage to the stage elastoplastic development of a crack is realized at 2,0…2,8 МПа .

Cyclic crack resistance of MA15 magnesium alloy and its weld joint

1982 ◽  
Vol 17 (5) ◽  
pp. 448-451
Author(s):  
S. Ya. Yarema ◽  
O. D. Zinyuk ◽  
T. I. Malinkina
Keyword(s):  
Magnesium Alloy ◽  
Crack Resistance ◽  
Weld Joint ◽  
Cyclic Crack Resistance
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