Corrosion Fatigue Crack Propagation Rates for Steam Turbine Blade 13% Cr Steels

Alyona Bashir; Włodzimierz Dudziński; Marek Dudziński; Teresa Ptak

doi:10.4028/www.scientific.net/SSP.227.7

Paper Titles

Preface and Organizing Committee

Novel Concepts on the Growth of Corrosion Fatigue Small and Short Cracks
p.3

Corrosion Fatigue Crack Propagation Rates for Steam Turbine Blade 13% Cr Steels
p.7

Corrosion Behaviour of Amorphous and Nanocrystalline Alloys
p.11

Influence of Plastic Deformation on the Corrosion Behaviour of As-Cast AlMg2 and AlCu4Mg1 Aluminium Alloys in NaCl Solution
p.15

Influence of the Crystallographic Orientation of Grains and Plastic Deformation on the Electrochemical Behavior of Pure Aluminum in Sodium Chloride Solution
p.19

Structure and Corrosion Behavior of Mg-Cu-Y-(Zn,Ni) Bulk Metallic Glasses
p.23

The Influence of Deformation the Corrosion Resistance of Titanium Grade2
p.27

Influence of Ageing on the Corrosion Resistance of the ZnAl22Cu3 and ZnAl40Cu3 Alloys
p.31

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Corrosion Fatigue Crack Propagation Rates for Steam Turbine Blade 13% Cr Steels

Abstract:

Studies of stress corrosion in X12Cr13 and X20Cr13 steels used for rotor blades of steam turbines have been conducted for determining the average rate of corrosion cracking development da / dt. Specimens were exposed to the salt mist environment of 1,2 ppm NaCl concentration in temperature of 60° C. The research environment represents the initial condensate of humidity from 3÷4%. Average rate of corrosion cracking development for specimens of the X12Cr13 is by 0,005 µm/h higher from specimens of the X20Cr13 steel. Course of the corrosion cracking initiation depends to a high degree on metal structure, and probably the close value of cracking propagation rate depends on the similar structure of those steels – high-tempered martensite with carbides at grain boundaries.

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Periodical:

Solid State Phenomena (Volume 227)

Pages:

7-10

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.227.7

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Online since:

January 2015

Authors:

Alyona Bashir*, Włodzimierz Dudziński, Marek Dudziński, Teresa Ptak

Keywords:

Steam Turbine, Steel, Stress Corrosion Cracking

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DOI: 10.1179/147842203767789177

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