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 193 for “"Welds"”.
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Tensile testing of welds
Thesis (B.S.) Massachusetts Institute of Technology. Dept. of Business and Engineering Administration, 1951.
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Control and qualification of titanium welds
… shielding gas was beneficial in obtaining good welds. Both heat input rate and cooling rate were found to affect the grain size of the weld, with the cooling rate being the dominant factor. The grain size exhibited a Hall-Petch effect on mechanical properties, such as the tensile properties and …
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Analyses of failures of fillet welds
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1997.
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Slag detachability from submerged arc welds
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1987.
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Hot gas welds in unplasticised polyvinyl chloride.
… on measured flaw sizes and failure stresses for welds confirmed the embrittlement of hot gas welded clear UPVC. Two approaches were tried to improve weld strengths: 1) to reduce the size and number of flaws and 2) to increase the toughness of the weld rod. An initial study indicated that changes …
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A fatigue design parameter for spot welds
The development of fatigue cracks in galvanized low carbon and high-strength-low-alloy tensile-shear-spot weldments was investigated using the AT & T Microhmeter. The boundaries between the three stages of the fatigue life were determined based on the resistivity measurements of the Microhmeter. …
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A fatigue model for thermite rail welds
The objective of this project was to examine the fatigue behavior of thermite-welded railroad rail and in particular the occurrence of fatigue defects in the rail head. A rail-head local-stress fatigue model (RAHELS) was developed to predict the type of rail-head defect that forms under a given set …
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Anomalous behaviour of molybdenum in steel welds
The addition of molybdenum to steel welds in quite small concentrations leads to a variety of anomalous microstructural and mechanical property effects. In some cases, the effects manifest even when there are no obvious changes in microstructure at the resolution of a transmission electron …
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Fracture of fillet welds under extreme loading
Thesis (Nav. E.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1996, and Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Materials Sciences and Engineering, 1996.
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A report on the testing of electric welds
… but because of the fact that properly made lap-welds never break in the weld, and hence give no indication as to the strength of the weld, this type was abandoned, and all V-type butt-welds were used. All of the welds, with a few exceptions which will be mentioned later, were tested in tension, …
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Automated ultrasonic inspection of heat exchanger tubesheets welds
… system for ensuring the integrity of the welds in a specific heat exchanger presently used in industry. The First Effect Steam Chest is a shell and tube, one pass type of heat exchanger used in the production of chlorine. A caustic soda/salt mixture is pumped through the bottom channel …
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Prevention of hydrogen cracking in HY-80 welds
Thesis: M.S., Massachusetts Institute of Technology, Department of Ocean Engineering, 1983
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Hydrogen assisted cracking of high strength steel welds
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1987.
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Thermal insulation of wet shielded metal arc welds
Thesis (Nav. E.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1994, and Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Materials Sciences & Engineering, 1994.
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Real time defect detection in welds by ultrasonic means
A computer controlled weld quality assurance system has been developed to detect weld defects ultrasonically whilst welding is in progress. This system, including a flash analogue to digital converter and built-in memories to store sampled data, a peak characters extractor and a welding process …
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Upper bounds to tensile loads for inhomogeneous T-welds
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1994.
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