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Keywords: superalloys
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Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. May 2012, 134(5): 052508.
Published Online: March 1, 2012
...Roland Mücke; Klaus Rau Modern heavy-duty gas turbines operate under hot gas temperatures that are much higher than the temperature capability of nickel superalloys. For that reason, advanced cooling technology is applied for reducing the metal temperature to an acceptable level. Highly cooled...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. September 2011, 133(9): 091301.
Published Online: April 14, 2011
... or for thermal cyclic tests. The former generally provides data for creep of the superalloy and the overall performance, and the later provide data for thermal barrier coating (TBC) spallation as a function of thermally grown oxide thickness, surface roughness, temperature, and thermal mismatch between...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. July 2011, 133(7): 072101.
Published Online: March 21, 2011
... alloys machinability nickel alloys superalloys wear polar diagram machinability Inconel 718 Inconel 718, which can be regarded as a nickel-based superalloy (according to AMS5596 and composition: 52,2Ni–19Cr–3,0Mo–5,1Nb–0,90Ti–0,50Al–18Fe), plays a major role in the production of both...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. August 2010, 132(8): 082103.
Published Online: May 11, 2010
... costs. These components are cast from either Co-based solid solution superalloys such as FSX-414, or Ni-based gamma prime precipitation strengthened superalloys such as IN738. The nominal compositions of FSX-414 and IN738 are Co–29.5Cr–10.5Ni–7W–2Fe (max)–0.25C–0.012B and Ni–0.001B–0.17C–8.5Co–16Cr...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. June 2010, 132(6): 062101.
Published Online: March 24, 2010
...Daniel McGuire; Xiao Huang; Doug Nagy; Weijie Chen Wide gap brazing (WGB) is a cost effective and reliable means to repair gas turbine hot section components with defect sizes exceeding 0.3 mm. However, it has been shown that WGB joints of nickel-based superalloys suffer from reduced ductility...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. May 2010, 132(5): 052401.
Published Online: March 4, 2010
...Roland Mücke; Piyawan Woratat The performance of heavy duty gas turbines is closely related to the material capability of the components of the first turbine stage. In modern gas turbines single crystal (SX) and directionally solidified (DS) nickel superalloys are applied, which, compared...
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. February 2010, 132(2): 022103.
Published Online: November 5, 2009
... and (ii) it provides an additional resistance to oxidation. It was the objective of this study to develop an understanding of the role of platinum in bond coats of the diffusion-type deposited on a nickel-based superalloy. Two Pt-containing bond coats were included in the study: (i) a platinum-aluminide...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. May 2009, 131(3): 032102.
Published Online: February 11, 2009
...Britta Laux; Sebastian Piegert; Joachim Rösler A new high temperature brazing technology for the repair of turbine components made of single crystalline nickel based superalloys has been developed. It allows the repair of single crystalline parts by producing an epitaxially grown braze gap within...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. May 2009, 131(3): 032101.
Published Online: February 10, 2009
... been used to explain the dwell fatigue of titanium alloys and high temperature creep-fatigue interactions in Ni-base superalloys under tensile cyclic creep rupture, compressive cyclic creep rupture, and tension/compression-hold strain controlled cyclic test conditions. 01 04 2008 02 04 2008...
Journal Articles
Article Type: Technical Briefs
J. Eng. Gas Turbines Power. May 2009, 131(3): 034501.
Published Online: January 29, 2009
...M. Aghaie-Khafri; S. Farahany Creep degradation of an IN738C superalloy after long-term thermal exposure in an atmospheric furnace was investigated by means of accelerated creep tests. Experimental observation showed that the minimum creep rate increased by increasing the exposure time or exposure...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. January 2009, 131(1): 012101.
Published Online: October 13, 2008
...Doug Nagy; Xiao Huang Repair of after-service gas turbine hot section superalloy components provides considerable saving in life-cycle cost of engines. Whereas a number of methods have been used in the past to repair these superalloy components, wide gap brazing technology has provided a practical...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. November 2008, 130(6): 062101.
Published Online: August 21, 2008
.... In this study, tension-torsion biaxial TMF tests have been performed between 450 ° C and 870 ° C on a Ni-base directional solidified superalloy. Strain ratio ϕ was defined as shear strain range, Δ γ , to normal strain range, Δ ε , and ϕ varied from 0 to infinity. The “Blade wave form,” which simulated...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. May 2008, 130(3): 032101.
Published Online: April 2, 2008
...Stephen Schoonbaert; Xiao Huang; Scott Yandt; Peter Au Co-base superalloys are commonly used for vanes and parts of the combustion chamber in gas turbine engines. The Co-base superalloys are primarily solid solution strengthened and have good resistance to hot corrosion, creep, and thermal fatigue...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. May 2008, 130(3): 032501.
Published Online: March 26, 2008
... to predict the FCG rate and, hence, life in single crystal components subject to mixed-mode fatigue loading. 16 10 2006 17 10 2006 26 03 2008 crack-edge stress field analysis discs (structures) fatigue cracks finite element analysis fracture mechanics nickel alloys superalloys...
Journal Articles
Article Type: Research Papers
J. Eng. Gas Turbines Power. January 2008, 130(1): 012506.
Published Online: January 9, 2008
... been developed from cyclic test data on smooth and notched specimens made of a ferritic 1.5CrNiMo rotor steel. The analytical formulations obtained have then been applied to test data on the nickel base superalloy MAR-M247 CC showing a good agreement between prediction and measurement. Moreover...
Journal Articles
Article Type: Technical Papers
J. Eng. Gas Turbines Power. October 2006, 128(4): 879–888.
Published Online: November 3, 2005
...Nagaraj K. Arakere; Erik Knudsen; Gregory R. Swanson; Gregory Duke; Gilda Ham-Battista Single-crystal superalloy turbine blades used in high-pressure turbomachinery are subject to conditions of high temperature, triaxial steady and alternating stresses, fretting stresses in the blade attachment...
Journal Articles
Article Type: Technical Papers
J. Eng. Gas Turbines Power. July 2005, 127(3): 629–637.
Published Online: June 24, 2005
... and Exhibition, Vienna, Austria, June 13–17, 2004, Paper No. 2004-GT-53938. Manuscript received by IGTI, October 1, 2003; final revision, March 1, 2004. IGTI Review Chair: A. J. Strazisar. 13 June 2004 01 October 2003 01 March 2004 24 06 2005 crystal orientation superalloys...
Journal Articles
Article Type: Technical Papers
J. Eng. Gas Turbines Power. October 2004, 126(4): 867–873.
Published Online: November 24, 2004
.... Long-term test results will be presented for commercially available wrought austenitic stainless steels and nickel-base superalloys exposed at 1300°F and 1400°F in environments containing various levels of water vapor. The presence of water vapor in oxidizing environments has been shown to alter...
Journal Articles
Article Type: Technical Papers
J. Eng. Gas Turbines Power. July 2004, 126(3): 590–603.
Published Online: August 11, 2004
...N. K. Arakere, Associate Professor, Hot section components in high-performance aircraft and rocket engines are increasingly being made of single crystal nickel superalloys such as PWA1480, PWA1484, CMSX-4, and Rene N-4 as these materials provide superior creep, stress rupture, melt resistance...