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Author: william luecke
Displaying records 31 to 35.
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31. Interlaboratory verification of silicon nitride tensile creep properties
William E Luecke, Sheldon Martin Wiederhorn
Five laboratories tested NIST-supplied, pin-loaded, 76-mm-long tensile creep specimens at 1400 degrees C under a 150 MPa load using flag-based, laser extensometry, The laboratories reported failure time and strain and supplied the individual creep cu ...
32. Sources of Strain-Measurement Error in Flag-Based Extensometry
William E Luecke, J French
This paper examines the sources of error in strain measurement using flag-based extensometry that uses either scanning laser or electrooptical extensometers, These errors fall into two groups: errors in measuring the true gauge length of the specimen ...
33. CAVITATION CONTRIBUTES SUBSTANTIALLY TO TENSILE CREEP IN SILICON NITRIDE
William E Luecke, Sheldon Martin Wiederhorn, B Hockey, Ralph Krause, Gabrielle Gibbs Long
During tensile creep of a hot isostatically pressed (HIPed) silicon nitride, the volume fraction of cavities increases linearly with strain; these cavities produce nearly all of the measured strain. In contrast, compressive creep in the same stress a ...
34. High-Temperature, Tensile, Constitutive Data for World Trade Center Steels
William E Luecke, Stephen W Banovic, Joseph David McColskey
This paper reports high-temperature tensile constitutive data for nine steels recovered from the fire and impact floors of the World Trade Center. Microstructurally, the nine steels represent typical structural steels from the 1970s. It reports the ...
35. Viscous Flow Creep in Ceramics Containing Secondary Crystalline Phases
Q Jin, D S Wilkinson, G C Weatherly, William E Luecke, Sheldon Martin Wiederhorn
Experimental observations of the creep response of a Y^d2^0^d3^-fluxed Si^d3^N^d4^ containing secondary crystalline phases(SP)are presented.The widths of grain-boundary amorphous films before and after creep have been characterized by using transmiss ...