Download or read book Modeling of High Strain Rate Deformation Fracture and Impact Behavior of Advanced Gas Turbine Engine Materials at Low and Elevated Temperatures written by and published by DIANE Publishing. This book was released on 2003 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Modeling of High Strain Rate Deformation Fracture and Impact Behavior of Advanced Gas Turbine Engine Materials at Low and Elevated Temperatures written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-03 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gamma titanium aluminides have received considerable attention over the last decade. These alloys are known to have low density, good high temperature strength retention, and good oxidation and corrosion resistance. However, poor ductility and low fracture toughness have been the key limiting factors in the full utilization of these alloys. More recently, Gamma-met PX has been developed by GKSS, Germany. These alloys have been observed to have superior strengths at elevated temperatures and quasi-static deformation rates and good oxidation resistance at elevated temperatures when compared with other gamma titanium aluminides. The present paper discusses results of a study to understand dynamic response of gamma-met PX in uniaxial compression. The experiments were conducted by using a modified split Hopkinson pressure bar between room temperature and 900 C and strain rates of up to 3500 per second. The Gamma met PX alloy showed superior strength when compared to nickel based superalloys and other gamma titanium aluminides at all test temperatures. It also showed strain and strain-rate hardening at all levels of strain rates and temperatures and without yield anomaly up to 900 C. After approximately 600 C, thermal softening is observed at all strain rates with the rate of thermal softening increasing dramatically between 800 and 900 C. However, these flow stress levels are comparatively higher in Gamma met PX than those observed for other TiAl alloys.Shazly, Mostafa and Nathenson, David and Prakash, VikasGlenn Research CenterGAS TURBINE ENGINES; LOW TEMPERATURE; STRAIN RATE; DEFORMATION; FRACTURE MECHANICS; HIGH TEMPERATURE TESTS; MATHEMATICAL MODELS; IMPACT TESTS; MECHANICAL PROPERTIES; STRESS-STRAIN DIAGRAMS; MICROSTRUCTURE; INTERMETALLICS; LOAD TESTS; SABOT PROJECTILES; VELOCITY DISTRIBUTION; THERMOCOUPLES; TITANIUM ALUMINIDES; TENSILE TESTS

Download or read book Modeling of High strain rate Deformation Fracture and Impact Behavior of Advanced Gas Turbine Engine Materials Nasa cr 2003 212194 written by United States. National Aeronautics and Space Administration and published by . This book was released on 2003* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book High Strain Rate Behavior of Nanocomposites and Nanocoatings written by Prashant Jindal and published by Springer. This book was released on 2014-12-30 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the use of multiwall carbon nanotubes as composites with polycarbonates and as protective coatings on glass surfaces. The book explains fabrication and characterization methods for these composites and coatings. The author reports on the use of Split Hopkinson Pressure Bar set up for evaluating the dynamic strength of these composites and coatings and studying the role of carbon nanotubes in the enhancement of their dynamic strength.

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