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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
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Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
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Showing 341 to 350 of 4126 (0.016 seconds)| 341 |
Rapid solidification of metals and alloysVitta, Satish January 1987 (has links)
Rapid solidification processing is widely used in industry, but the underlying mechanisms are not completely understood. In the present work, an effort is made to understand the effects of rapid heat extraction and large undercooling on the solidification sequence, in particular: (1) the transition from diffusion-limited growth to impingement-limited growth; and (2) crystal nucleation in deeply undercooled liquids. Rapid solidification can be achieved either by (1) rapid quenching, or (2) large undercooling. Accordingly, two different methods are used in the present work. They are, (a) nanosecond pulsed laser quenching, and (b) bulk undercooling in a liquid flux. Thin films prepared by d.c. magnetron getter sputtering have been used in pulsed laser quenching. Both pure metals (Fe, Zr, Ti, Co, Ge) and binary alloys (Nb-Ni, Ti-Co) prepared by this method are investigated. Alloys Fe<SUB>40</SUB>Ni<SUB>40</SUB>B<SUB>20</SUB>, Ni<SUB>75</SUB>Si<SUB>8</SUB>B<SUB>17</SUB> and elemental Ge have been used in bulk undercooling. The metastable structures obtained are analysed by optical microscopy, scanning electron microscopy, electron probe microanalysis, transmission electron microscopy and X-ray diffraction. The results obtained are discussed in terms of non-equilibrium crystal nucleation and growth processes.
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| 342 |
Fatigue studies in Al-Mg-Si alloysGuengoeor, Salih January 1990 (has links)
No description available.
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| 343 |
Investigation of the factors controlling the codeposition of chromium-vanadium alloysBahrololoom, Mohammad Ebrahim January 1990 (has links)
No description available.
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| 344 |
Fatigue crack growth in Al7010-T7451 and Al7050-T7451 under complex loading conditionsWie, Liwu January 1998 (has links)
No description available.
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| 345 |
Evolution of microstructure and thermal stability of Al-Ti-O and Al-Li-Mg based materialsBarlow, Ian Christopher January 2001 (has links)
No description available.
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| 346 |
The high temperature corrosion of commercial and experimental alloys in HCl/H2̲O/O2̲ and air/Cl2̲ environmentsAnsari, A. A. January 1984 (has links)
No description available.
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| 347 |
Hydrogen in aluminium and its alloysTalbot, D. E. J. January 1989 (has links)
No description available.
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| 348 |
The solubility of hydrogen in some commercial aluminium-lithium alloysSargent, M. A. January 1989 (has links)
No description available.
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| 349 |
Heterogeneous polyethylene alloysBottomley, L. January 1988 (has links)
No description available.
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| 350 |
A microstructural study of oxidation of Zircaloy-2 in airIshii, Yoshiaki January 1998 (has links)
No description available.
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