Eddy-Current Inspection of Cracking in Land-Based Gas Turbine Blades

2004 ◽  
Author(s):  
H. Fukutomi
Keyword(s):  
Gas Turbine ◽  
Eddy Current ◽  
Turbine Blades ◽  
Gas Turbine Blades ◽  
Eddy Current Inspection

Finite Element Modeling of the Eddy-Current Inspection of Land-Based Gas Turbine Blades

2001 ◽  
Author(s):  
Hiroyuki Fukutomi ◽  
Takashi Ogata
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Gas Turbine ◽  
Eddy Current ◽  
Gas Turbines ◽  
Turbine Blades ◽  
Combined Cycle ◽  
Multiple Cracks ◽  
Gas Turbine Blades ◽  
Element Modeling

There has been a growing need in recent technology of gas turbines in combined cycle to assess the remaining life of high temperature components. It is also required that the nondestructive assessment be more accurate in maintaining combined cycle plants. This paper describes the use of a simulator solving forward and inverse problems under eddy current testing, in parametric studies of inspection parameters for 1100°C-class gas turbine blades in terms of test probe capabilities, frequencies and signal interpretation. The simulator is based on a differential formulation constructed with a magnetic vector potential and a 3-dimensional edge-based finite-element modeling method. Its features are forming coils and defects independent of a whole finite element model, very fast eddy current response predictions, and identifications of electromagnetic properties. Using the simulator, optimal sensor types and test frequencies are determined in terms of assessment of degradation, selectability between surface-breaking and subsurface cracks, reconstruction of crack profiles, and detection of multiple cracks.

UDIMET L-605

Alloy Digest ◽  
2004 ◽  
Vol 53 (12) ◽  
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Gas Turbine ◽  
Oxidation Resistance ◽  
Turbine Blades ◽  
Heat Treating ◽  
Gas Turbine Blades ◽  
Temperature Performance

Abstract Udimet L-605 is a high-temperature aerospace alloy with excellent strength and oxidation resistance. It is used in applications such as gas turbine blades and combustion area parts. This datasheet provides information on composition, physical properties, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, and joining. Filing Code: CO-109. Producer or source: Special Metals Corporation.

Spread in results of fatigue tests of cast gas-turbine blades in connection with design and technological factors

1976 ◽  
Vol 8 (6) ◽  
pp. 643-647
Author(s):  
B. F. Balashov ◽  
A. N. Petukhov ◽  
A. N. Arkhipov ◽  
B. V. Volodenko
Keyword(s):  
Gas Turbine ◽  
Turbine Blades ◽  
Fatigue Tests ◽  
Gas Turbine Blades ◽  
Technological Factors
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