Global ETD Search
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 276 for “"hardened"”.
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Dimensional changes in hardened gage steels
Thesis (Sc.D.) Massachusetts Institute of Technology. Dept. of Metallurgy, 1947.
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Cyclic Deformation and Fatigue Behavior of Hardened Steels
Made available in DSpace on 2014-12-10T17:25:50Z (GMT). No. of bitstreams: 1 6915342.pdf: 3082155 bytes, checksum: b047ae8e380904f3539fc617579f48bc (MD5) Previous issue date: 1969
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Thermally Hardened RF GaN HEMTs in Extreme Environments
Traditional, room temperature electronics based on silicon has truly changed the world around us over the past 70+ years. However, many more applications still exist that are limited by the temperature performance of silicon devices (<250◦C). This area of high temperature (HT) electronics is an …
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Developing An Alternative Hardened Concrete Air Void Characterization Method
… an alternative characterization method for the hardened air void system in concrete. This study uses ASTM C457, “Standard Test Method for Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete” as a baseline characterization method and attempts to thoroughly reduce …
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Circuit designs for low-power and SEU-hardened systems
… design culminates in a proposed unique radiation hardened dual data rate flip-flop, Firebird'. Firebird offers a valuable addition to the future circuit designs, especially with the increasing importance of the Single Event Upsets (SEUs) and power dissipation with technology scaling.'
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Fatigue optimization of an induction hardened shaft under combined loading
… the fatigue optimization of a notched, induction hardened, steel shaft subjected to combined bending and torsional loading. Finite element analysis is used first to develop unit-load factors for generating stress-time histories, and then, employing thermo-elastic techniques, to determine the …
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Single event upset hardened CMOS combinational logic and clock buffer design
A radiation strike on semiconductor device may lead to charge collection, which may manifest as a wrong logic level causing failure. Soft errors or Single Event Upsets (SEU) caused by radiation strikes are one of the main failure modes in a VLSI circuit. Previous work predicts that soft error rate …
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Microstructural analysis of rapid austenite formation in induction hardened steels, A
Includes bibliographical references (pages 66-71).
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Investigation of Reactive Electrokinetic Processes for Permeability Reduction in Hardened Cement Paste
… of transporting chemical precursors into hardened cement paste pores using an electric field and causing them to undergo a chemical reaction that results in blocking the pores and reducing permeability. The chemical precursors, silicate and aluminate solutions and sols, were tested with …
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Advances in measuring parameters of the air-void system in hardened concrete
… of the parameters of the air-void system in hardened concrete is detailed in ASTM C457 “Standard Test Method for Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete.” Microscopical methods are used to determine traverse lengths of air voids, aggregates, and …
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Fault tolerant design implementation on radiation hardened by design SRAM-Based FPGAs
… is the first commercially available Radiation Hardened By Design (RHBD) SRAM-based FPGA; however, not all of its internal components are hardened against radiation-induced errors. This thesis examines and quantifies the additional considerations and techniques designers should employ with a …
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The influence of the grinding process on the structure of hardened steel
Thesis (Sc.D.) Massachusetts Institute of Technology. Dept. of Metallurgy, 1954.
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Analysis of air-void system in hardened concrete from a three-dimensional perspective
… of Parameters of the Air-Void System in Hardened Concrete” is widely used for measuring the air void system. This manually conducted measurement is tedious and time-consuming, so automated methods have been explored. This study seeks to advance the technology for automating the …
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The metallographic examination of cast, annealed, and age-hardened high-silicon monel metals
Thesis: B.S., Massachusetts Institute of Technology, Department of Metallurgy, 1940
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Effects of chromium powder mixed in electrical discharge machining of AISI D2 hardened steels
… of Cr powder mixed in EDM machining of AISI D2 hardened steel using copper tungsten electrode which has been done successfully. Data were analysed using design of three factors at a time consisted of peak current (Ip), pulse-on (Pon) and powder concentration(C). Discussions were made on the …
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An Assessment of in-Service Stress Relaxation of a Work-Hardened Aluminum-Magnesium Alloy
The bent beam relaxation test---a simple method to measure relaxation at stress levels well below the usual 0.2% offset yield stress, is outlined first, and the method to analyze the experimental results is also discussed. Several constitutive models are applied to fit the experimental results, …
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The fatigue-crack growth and fracture characteristics of a precipitation-hardened semiaustenitic stainless steel
Fatigue-crack propagation and residual static-strength data on PH15-7Mo (TH 1050) stainless steel are presented in this thesis. In addition, the capability of McEvily and Illg's crack-growth analysis and Kuhn and Figge's residual strength analysis to correlate the test data has been investigated. …
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