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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 353 for “"elevated temperature"”.
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Phonon hydrodynamic transport at elevated temperature
… deemed exotic and mattered only at extremely low temperatures. In this work, by combining the theoretical and experimental approach, we successfully predict and confirm the existence of phonon hydrodynamic transport in graphite above 200 K. More specifically, we introduce a direction-dependent …
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Phonon hydrodynamic transport at elevated temperature
… deemed exotic and mattered only at extremely low temperatures. In this work, by combining the theoretical and experimental approach, we successfully predict and confirm the existence of phonon hydrodynamic transport in graphite above 200 K. More specifically, we introduce a direction-dependent …
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Metal Fatigue With Elevated Temperature Rest Periods
Made available in DSpace on 2014-12-10T17:25:47Z (GMT). No. of bitstreams: 1 6910839.pdf: 1454859 bytes, checksum: 45e91d4b6597f6ef353f7c41bed3fc78 (MD5) Previous issue date: 1968
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Elevated temperature formability of Ti-6A1-4V.
Massachusetts Institute of Technology. Dept. of Metallurgy and Materials Science. Thesis. 1970. M.S.
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Elevated temperature mechanical properties of line pipe steels
The effects of test temperature on the tensile properties of four line pipe steels were evaluated. The four materials include a ferrite-pearlite line pipe steel with a yield strength specification of 359 MPa (52 ksi) and three 485 MPa (70 ksi) yield strength acicular ferrite line pipe steels. …
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Elevated temperature mechanical properties of line pipe steels
The effects of deformation temperature near the dynamic strain aging (DSA) regime on the tensile properties of X70 and X52 line pipe steels were evaluated. Testing temperatures of interest were in the range of 25 to 350 °C, at engineering strain rates in the range of approximately 10 4 to 10 3 s 1. …
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Elevated temperature stability of gallium arsenide integrated circuits
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.
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Elevated temperature mechanical properties of zirconium diboride based ceramics
… the mechanical behavior of ZrB₂ based ceramic at elevated temperatures. Flexure strength, fracture toughness, and elastic modulus were measured at temperatures up to 2300ºC for three compositions: monolithic ZrB₂ (Z); ZrB₂ - 30 vol% SiC - 2 vol% B₄ C (ZS); and ZrB₂ - 10 vol% ZrC (ZC). In argon, Z, …
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Performance analysis of high power photoconductive switch at elevated temperature
… code and the simulations were performed at a temperature of 330 K. The carrier conduction process during the on-state operation of the device showed current controlled negative resistivity behavior at elevated temperature, due to heating of contacts and the bulk. Analysis shows that …
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Elevated Temperature Fatigue Behavior of 2.25 Cr-1 Mo Steel
Made available in DSpace on 2017-07-06T18:55:57Z (GMT). No. of bitstreams: 3 Raghuraman_S_MS.pdf: 60123616 bytes, checksum: f3e470db0d8155da904f0e846f2f975e (MD5) Raghuraman_S_MS_ABS.pdf: 963456 bytes, checksum: 2641591282a1687b0042df3c2a0fd1ba (MD5) license.txt: 4813 bytes, checksum: …
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Effects of elevated temperature exposure on cement-based composite materials
… when they are exposed to extremely high temperatures. This research aims to improve the understanding of complex mechanisms that drive thermal degradation of cement-based composite materials. The majority of this dissertation focuses on understanding the degradation that occurs at …
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Mode I Delamination Fracture Characterization of Polymeric Composites under Elevated Temperature
… delamination fracture properties under elevated temperature when PMC properties become time-, loading-history, and rate-dependent. A new experimental methodology based on linear viscoelastic fracture theory is developed and verified through finite element analysis and experiments. This …
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Austenite grain-size control at elevated temperature in microalloyed carburizing steels
Includes bibliographical references (pages 194-208).
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Design of Si/SiC hybrid structures for elevated temperature micro-turbomachinery
thermal softening behavior at temperatures above 900 K. This thermal softening behavior limits the turbine inlet temperature, which in turn significantly degrades the overall engine efficiency. Previous studies have shown that hybrid structures of silicon and silicon carbide have good potential for …
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Thermophysical Properties and Microstructural Changes of Composite Materials at Elevated Temperature
… and modifications to allow for potential high temperature use. Experimental techniques were used to measure the properties of composite construction materials commonly used in naval applications: E-glass vinyl ester laminates and end-grain balsa wood core. The simultaneous DSC/TGA was used to …
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Creep and Elevated Temperature Mechanical Properties of 5083 and 6061 Aluminum
… understanding of the behavior of aluminum at elevated temperatures. The aluminum samples 5083-H116 and 6061-T651 were examined under a variety of loading conditions and temperatures. Tensile testing was completed on both materials to measure strength properties of elastic modulus, yield …
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Elevated temperature mechanical properties and corrosion characteristics evaluation of alloy Ht-9
… strength were gradually reduced with increasing temperature, but the ductility parameters were enhanced due to increased plastic deformation, irrespective of the tempering time. The results of SCC testing in the 90°C acidic solution, performed by the slow-strain-rate (SSR) technique, revealed …
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Elastomer Degradation in Chemically Reactive Environment under Elevated Temperature and Pressurized Condition
… in chemically active environment, especially at elevated temperature and/or under high pressure. Beside physical relaxation due to the viscoelastic nature of polymers, diffusion-reaction process plays an important role in accelerating elastomer deterioration. In a previous research, Fickian …
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The mechanism of crack initiation in silicon-iron under elevated temperature fatigue conditions.
Thesis: M.S., Massachusetts Institute of Technology, Department of Mechanical Engineering, 1973
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