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Keywords: cracks
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Journal Articles
Article Type: Research-Article
J. Eng. Gas Turbines Power. February 2013, 135(2): 022101.
Paper No: GTP-12-1328
Published Online: January 8, 2013
..., 2012; final manuscript received August 13, 2012; published online January 8, 2013. Editor: Dilip R. Ballal. 12 08 2012 13 08 2012 The 7050 aluminum alloy is used in many aerospace structural applications. Previous studies have identified that fatigue cracks develop very rough crack...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. May 2012, 134(5): 051301.
Published Online: March 5, 2012
... decreased Hertzian contact stresses. A correlation of backside cracking velocity versus target size was made based on a simplified elastic foundation analysis. 22 06 2011 23 06 2011 05 03 2012 05 03 2012 ceramics cracks fracture gas turbines silicon compounds steel...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. March 2012, 134(3): 032501.
Published Online: December 28, 2011
...James C. Newman, Jr.; Balkrishna S. Annigeri Plasticity effects and crack-closure modeling of small fatigue cracks were used on a Ti-6Al-4V alloy to calculate fatigue lives under various constant-amplitude loading conditions (negative to positive stress ratios, R) on notched and un-notched...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. August 2011, 133(8): 082101.
Published Online: April 8, 2011
... of these blades. HPT blades made of the nickel-based superalloy Mar-M002 have been found to suffer from stress assisted grain boundary oxidation (SAGBO) cracking. HPT blades removed from an RB211-24C aeroderivative industrial GTE were sectioned, and the cracks and microstructure were studied using scanning...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. October 2010, 132(10): 102902.
Published Online: June 30, 2010
...Ian de Curieres; Marie-Christine Meunier; Pierre Joly The aim of the paper is to introduce methods to estimate the residual life of steam generators with alloy 600 thermally treated (TT) tubing, taking into account primary water stress corrosion cracking (PWSCC) as the main contributor damage...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. August 2010, 132(8): 082805.
Published Online: May 27, 2010
... 27 05 2010 27 05 2010 cracks engines ignition time series HCCI engines are of interest due to their advantages over conventional spark ignition (SI) and compression ignition (CI) engines. In particular, low emission levels in terms of NOx and particulate matter, and high...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. August 2010, 132(8): 082102.
Published Online: May 11, 2010
...Warren Miglietti; Madeleine Du Toit Both aviation and land based turbine components such as vanes/nozzles, combustion chambers, liners, and transition pieces often degrade and crack in service. Rather than replacing with new components, innovative repairs can help reduce overhaul and maintenance...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. March 2010, 132(3): 032101.
Published Online: December 2, 2009
...Britta Laux; Sebastian Piegert; Joachim Rösler High-temperature diffusion brazing is a very important technology for filling cracks in components from single-crystalline nickel-base superalloys as used in aircraft engines and stationary gas turbines: Alloys, which are similar to the base material...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. July 2009, 131(4): 042903.
Published Online: April 15, 2009
...Igor Simonovski; Leon Cizelj The dominant processes in the initialization and propagation of microstructurally short cracks include microstructural features such as crystallographic orientations of grains, grain boundaries, inclusions, voids, material phases, etc. The influence...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. March 2009, 131(2): 022101.
Published Online: December 19, 2008
... the degradation of the TBC and determine the extent of TGO cracking, TGO growth, bond coat oxidation, and TBC failure location after long term exposure for up to 18,000 h . Optical microscopy and a scanning electron microscope (SEM) attached with an energy dispersive spectroscopy (EDS) system were used to study...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. May 2008, 130(3): 031301.
Published Online: April 2, 2008
...Sung R. Choi; Robert W. Kowalik Interlaminar crack growth resistances were evaluated for five different SiC fiber-reinforced ceramic matrix composites (CMCs) including three gas-turbine grade melt-infiltrated Si C ∕ Si C composites. Modes I and II crack growth resistances, G I and G II , were...
Journal Articles
Article Type: Technical Papers
J. Eng. Gas Turbines Power. January 2007, 129(1): 69–79.
Published Online: June 28, 2006
... and the results were compared to field experience data. The absolute number of cycles to crack initiation appeared hard to predict, but the location and direction of cracking could be correlated well with field data. 05 01 2006 28 06 2006 gas turbines jet engines computational fluid dynamics...
Journal Articles
Article Type: Technical Papers
J. Eng. Gas Turbines Power. October 2005, 127(4): 814–819.
Published Online: September 20, 2005
...S. C. Forth; B. S. Annigeri; W. D. Keat The surface integral method, an indirect boundary element method that represents a crack as a distribution of force dipoles, has been developed to model three-dimensional nonplanar crack growth in complex structures. The finite body was effectively modeled...
Journal Articles
Article Type: Technical Papers
J. Eng. Gas Turbines Power. July 2004, 126(3): 590–603.
Published Online: August 11, 2004
... cracks with multiple origins at the core leading edge radius and extending down the airfoil span along the core surface. The longer cracks transitioned from stage II fatigue to crystallographic stage I fatigue propagation, on octahedral planes. An investigation of crack depths on the population of blades...
Journal Articles
Article Type: Technical Papers
J. Eng. Gas Turbines Power. October 2003, 125(4): 1021–1025.
Published Online: November 18, 2003
... treatments are to prevent crack initiation, to retard propagation of small cracks, and even to resist corrosion and wear damage. In this paper the literature on these technologies and their effects on component reliability and durability is reviewed, with an emphasis on shot peening (SP), laser shock peening...
Journal Articles
Article Type: Technical Papers
J. Eng. Gas Turbines Power. January 2003, 125(1): 236–240.
Published Online: December 27, 2002
...R. L. McAlpin; P. L. Talley; H. L. Bernstein; R. E. Holm The common failure modes of variable inlet guide vanes (VIGVs or IGVs) on industrial gas turbines are reviewed. These mechanisms include corrosion, cracking, and wear of the IGVs, their bushings and thrust washers. A new mechanism for IGV...
Journal Articles
Article Type: Technical Papers
J. Eng. Gas Turbines Power. October 2002, 124(4): 922–930.
Published Online: September 24, 2002
...Y. C. Zhou; T. Hashida Delamination cracking in thermal barrier coating (TBC) system is studied with the newly developed theoretical model. A semi-infinite long interface crack is pre-existing. The thermal stress and temperature gradient in TBC system are designated by a membrane stress P...
Journal Articles
Article Type: Technical Papers
J. Eng. Gas Turbines Power. July 2002, 124(3): 465–470.
Published Online: June 19, 2002
... for predicting the effects of time and temperature on CMC tensile rupture under various composite and engine conditions. These models are based on the average rupture behavior measured in air for oxide and SiC-based fibers of current technical interest. For example, assuming a cracked matrix and Larson-Miller...
Journal Articles
Article Type: Technical Papers
J. Eng. Gas Turbines Power. July 2000, 122(3): 457–461.
Published Online: May 15, 2000
... cracking susceptibility has been studied to obtain optimum condition for crack-free welds. Variations in cracking susceptibility as a function of welding heat input is discussed with reference to metallurgical characteristics of the welds. [S0742-4795(00)02003-2] Contributed by the International Gas...