Tesis sobre el tema "Steel alloys"
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Morrissey, Francis H. J. "A study of fracture and segregation in corrosion resistant alloys : 316ss, Alloy 600 and Alloy 690". Thesis, University of Bristol, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.284840.
Texto completoFrom, Malin, Johanna Ejerhed, Artin Fattah, Markus Lindén y Alex Karlstens. "Heat Resistant Steel Alloys : Atlas Copco". Thesis, Uppsala universitet, Institutionen för teknikvetenskaper, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-256662.
Texto completoSismanis, Panagiotis G. 1959. "The dissolution of niobium and zirconium in liquid steel". Thesis, McGill University, 1987. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=28391.
Texto completoLower bath superheats allowed a reaction to take place at the steel shell/niobium interface while higher superheats didn't; the intermetallic compounds Fe$ sb 2$Nb and Fe$ sb 2$Nb$ sb 3$ were identified as the reaction products. Niobium dissolved relatively slowly in liquid steel and its dissolution speed was increased under dynamic conditions (i.e., inductively stirred baths).
In the case of zirconium, an exothermic reaction occurred at the steel shell/zirconium interface and the intermetallics Fe$ sb 2$Zr and FeZr$ sb 2$ were identified as the reaction products. This reaction was triggered at 1220 K by the formation of a liquid Fe-Zr (76 at% Zr) eutectic. For the experimental conditions under which this study was performed, the hydrodynamic conditions of the steel baths did not seem to influence the dissolution rates of zirconium.
A simplified mathematical model was used in order to simulate the coupled heat and mass transfer phenomena which take place during the two periods.
Yu, Dawei. "Welding metallurgy and toughness improvement for mild and low-alloyed steel electroslag weldments /". Full text open access at:, 1988. http://content.ohsu.edu/u?/etd,164.
Texto completoMavropoulos, L. T. "The synergistic effect of niobium and boron on recrystallization in hot worked austentite /". Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=74031.
Texto completoSchroth, James Gregory. "Combined mode I - mode III fracture toughness of a high-strength low-alloy steel /". The Ohio State University, 1985. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487260859496482.
Texto completoOlajire, Kabiru Ayinde. "Machining of aerospace steel alloys with coated carbides". Thesis, Coventry University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301195.
Texto completoHarty, Brian Dudley. "Corrosion fatigue of engineering alloys in aqueous environments". Doctoral thesis, University of Cape Town, 1990. http://hdl.handle.net/11427/18215.
Texto completoHayes, Alethea M. "Compression behavior of linear cellular steel". Thesis, Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/32857.
Texto completoWong, Yat Khin. "A phenomenological and mechanistic study of fatigue under complex loading histories". University of Western Australia. School of Mechanical Engineering, 2003. http://theses.library.uwa.edu.au/adt-WU2003.0017.
Texto completoChen, Jhewn-Kuang. "Effects of alloying elements upon austenite decomposition in high strength low alloy steels". Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-10102009-020227/.
Texto completoKülünk, Bahadir. "Aqueous modelling of aluminum wire injection procedures in steelmaking". Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=66225.
Texto completoDaames, Sherwyn. "The metallurgical phase transformations in ROQ-tuf AD690 due to the MMA welding process". Thesis, Peninsula Technikon, 2002. http://hdl.handle.net/20.500.11838/1264.
Texto completoPhase transformations in steel are of profound commercial importance due to the fact that they influence the physical and mechanical properties of the end product. During the casting process, which occurs at temperatures in excess of 1500°C, the microstructure of the steel is austenitic. During slow cooling the austenite will decompose into lower temperature microstructures such as ferrite, pearlite or hard, brittle cementite, the latter becoming increasingly present the higher the carbon content of the steel. Steel manufacturers, however, make use of additional forming processes such as rolling, quenching and reheat or tempering to impart specific mechanical or metallurgical properties to a particular steel. If the cooling rate is increased, as would be the case during a quenching process, the austenite will decompose forming a needle like microstructure called bainite in addition to the other microstructures. A further increase in the cooling rate will result in the diffusionless transformation of part of the austenite to form martensite, a hard brittle microstructure. If heat was now to be applied to the steel, as in a tempering process, some of the martensite formed during the quenching process will again transform into a softer microstructure such as pearlite or ferrite.
Barritt, Andrew Stephen. "Detection of hydrogen embrittlement in steel and steel alloys using methods of neutron radiography". Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/32597.
Texto completoYao, Lan Lance. "Atom probe microscopy of clustering and precipitation processes in microalloyed strip cast steels". Thesis, The University of Sydney, 2011. https://hdl.handle.net/2123/29282.
Texto completoZacharia, Nicole S. B. Massachusetts Institute of Technology. "Thermal imaging of quenched microstructural evolution in steel alloys". Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/118566.
Texto completoCataloged from PDF version of thesis.
Includes bibliographical references (page 41).
A method was devised for quenching undercooled samples of Fe-12Cr-16Ni. The samples were levitated in a magnetic field as a way of containerless processing. They were dropped onto a nucleation trigger and then into a quenching bath. This process was successful in producing quenched samples , but the layer of In-Ga wetting their surface showed problematic in the analysis of the samples. Data shows that double recalescence was observed in a few cases. SEM proved inconclusive and was not sensitive enough to detect the small chemical variations expected in the dendrites. Also, across the entirety of the sample there was no significant partitioning of Cr or Ni.
by Nicole Zacharia.
S.B.
Hiuhu, John. "Shear spinning of nickelbased super alloys and stainless steel". Thesis, Högskolan Väst, Avdelningen för maskinteknik och naturvetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-8685.
Texto completoKish, Joseph J. "Active-passive corrosion of Fe-Cr-Ni alloys in hot concentrated sulphuric acid solutions /". *McMaster only, 1999.
Buscar texto completoMukherjee, Sunit. "Quantitative characterization of void nucleation and growth in HY-100 steels". Thesis, Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/19574.
Texto completoSulaiman, Samsiah. "Structure of properties of the heat affected zone of P91 creep resistant steel". Access electronically, 2007. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20080916.150054/index.html.
Texto completoWang, Xiaolan. "The effects of rust on the gas carburization of AISI 8620 steel". Worcester, Mass. : Worcester Polytechnic Institute, 2008. http://www.wpi.edu/Pubs/ETD/Available/etd-073108-094449/.
Texto completoThorpe, Adam. "The Sintering of maraging steel with phosphorous additions /". St. Lucia, Qld, 2003. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe17533.pdf.
Texto completoMartins, Meco Sonia Andreia. "Joining of steel to aluminium alloys for advanced structural applications". Thesis, Cranfield University, 2016. http://dspace.lib.cranfield.ac.uk/handle/1826/10288.
Texto completoAl-Zamily, A. A. H. "Combined temperature and strain cycling effect on three steel alloys". Thesis, University of Bristol, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384447.
Texto completoSeth, Sampan. "Novel aluminium alloys for thermal spray applications to steel substrates". Thesis, Sheffield Hallam University, 2015. http://shura.shu.ac.uk/20345/.
Texto completoKalcioglu, Ali Ferdi 1960. "Distribution of antimony between carbon-saturated iron and blast furnace slags". Thesis, The University of Arizona, 1989. http://hdl.handle.net/10150/277129.
Texto completoYin, Maggie Huaying Materials Science & Engineering Faculty of Science UNSW. "Metal dusting of iron and low alloy steel". Awarded by:University of New South Wales. School of Materials Science and Engineering, 2006. http://handle.unsw.edu.au/1959.4/25188.
Texto completoAnderson, Danny. "Effect of the joint addition of aluminum and molybdenum on the precipitation and recrystallization in HSLA steels". Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=66207.
Texto completoXie, Kelvin Yu Xuan. "The effect of niobium-rich clusters on the mechanical properties of ultra-thin strip cast steels produced by the CASTRIP® process". Thesis, The University of Sydney, 2012. http://hdl.handle.net/2123/17140.
Texto completoArmstrong, Derek C. "Influence of segregated impurities on the corrosion and oxidation of ferrous alloys". Thesis, University of Cambridge, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239600.
Texto completoWolff, Ira M. "Ductility in high chromium super-ferritic alloys". Doctoral thesis, University of Cape Town, 1989. http://hdl.handle.net/11427/22200.
Texto completoBibliography: pages 187-201.
The competition between microfracture and plastic flow has been studied in relation to the thermomechanical processing parameters and minor element chemistry of wrought super-ferritic alloys based on a composition of Fe-40wt% Cr. These alloys have been developed for corrosion-resistant applications, specifically by micro-alloying with platinum group metals to induce cathodic modification, but their use has been hampered by inadequate toughness at ambient temperatures. Brittle cleavage of the alloys is a consequence of the high resistance to plastic flow required to accommodate local stresses, such as those found ahead of a loaded crack. Once initiated, a crack propagates in a brittle manner with minimal ductility. The impact toughness therefore relies on the ability of the alloys to withstand crack initiation. The frequency of the crack initiation events is related to the distribution of secondary phases within the matrix and at the grain boundaries. A direct means of improving the toughness and the ductility is accordingly via annealing cycles and minor alloying additions to control the precipitation of second phases. The ductility is enhanced by raising the mobile dislocation density, and this may be achieved by pre-straining recrystallised material, or increasing the number of dislocation sources in the otherwise source-poor material. The generation of mobile dislocations by prismatic punching at second phase particles in response to local or tessellated stresses was found to increase the ductility and the impact toughness of the alloy. The addition of nickel also increases the brittle fracture resistance by promoting stress accommodation at the crack tip, a result which can, in principle, be explained on the basis of enhanced dislocation dynamics. The tendency of the alloys to form a stable recovered substructure was identified as a critical parameter for both the mechanical and corrosion properties. The low-angle dislocation sub-arrays contribute to overall strain-hardening, but destabilise the passivity of the alloys in acid media. In practice, rationalisation of the microstructural parameters has enabled the practicable fabrication of tough, corrosion-resistant alloys, suitable for commercial development.
Coffey, Melvin W. "The effect of antimony on segregation during dendritic solidification in a cast modified 4720 alloy /". Full text open access at:, 1985. http://content.ohsu.edu/u?/etd,93.
Texto completoWatson, Maxine. "Phase stability, constitution and precipitation effects in Fe-Ni-Cr alloys". Thesis, Sheffield Hallam University, 1990. http://shura.shu.ac.uk/20503/.
Texto completoHu, Rong. "Irradiation effects on Fe-Cr alloys". Thesis, University of Oxford, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.560928.
Texto completoKim, Yeong Ho. "Chromium-free consumable for welding stainless steel corrosion perspective /". Columbus, Ohio : Ohio State University, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1133285376.
Texto completoBowen, J. R. "The formation of ultra-fine grained model aluminium and steel alloys". Thesis, University of Manchester, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.508036.
Texto completoBowden, David. "Assessment of cobalt-free hardfacing stainless steel alloys for nuclear applications". Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/assessment-of-cobaltfree-hardfacing-stainless-steel-alloys-for-nuclear-applications(3da6a424-94af-4d11-82fa-92dc3b7ddded).html.
Texto completoAl, Tooq Zainab. "Simulating radiation damage in austenitic stainless steel and Ni-based alloys". Thesis, Loughborough University, 2013. https://dspace.lboro.ac.uk/2134/12599.
Texto completoDaggula, Manikantha Reddy. "REPLACEMENT OF STEEL PARTS WITH EXTRUDED ALUMINUM ALLOYS IN AN AUTOMOBILE". OpenSIUC, 2016. https://opensiuc.lib.siu.edu/theses/2053.
Texto completoDogo, Harun. "Point defect properties in iron chromium alloys". Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2006. http://library.nps.navy.mil/uhtbin/hyperion/06Sep%5FDogo.pdf.
Texto completoThesis Advisor(s): Craig Smith, Xavier Maruyama. "September 2006." Includes bibliographical references (p. 57-59). Also available in print.
Watkins, Mark Edward. "Calcium modification of surface oxides formed on levitated iron and steel alloy droplets and related surface tension phenomena /". The Ohio State University, 1987. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487330761217245.
Texto completoSneddon, A. D. "Macrofouling and corrosion of steels and copper-nickel alloys in seawater". Thesis, Robert Gordon University, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.378071.
Texto completoHays, Richard A. "Surface residual stress effects on stress corrosion cracking/hydrogen embrittlement behavior of AISI 4340 steel". Thesis, Virginia Polytechnic Institute and State University, 1988. http://hdl.handle.net/10919/80148.
Texto completoMaster of Science
Komarasamy, Mageshwari. "Deformation Micro-mechanisms of Simple and Complex Concentrated FCC Alloys". Thesis, University of North Texas, 2015. https://digital.library.unt.edu/ark:/67531/metadc822829/.
Texto completoAdolfi, Sofia. "Slag inclusion formation during solidification of steel alloys and in cast iron". Licentiate thesis, Stockholm : Materialvetenskap, Kungliga Tekniska högskolan, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4371.
Texto completoElmer, John Walter. "The influence of cooling rate on the microstructure of stainless steel alloys". Thesis, Massachusetts Institute of Technology, 1988. http://hdl.handle.net/1721.1/14615.
Texto completoKertz, Joan Elizabeth 1975. "The kinetics of growth competition during rapid solidification of ternary steel alloys". Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/8456.
Texto completoIncludes bibliographical references (leaves 99-102).
The rapid solidification growth behavior of ternary stainless steel alloys was examined using electromagnetic levitation and high-speed digital imaging, and the growth behavior of the stable fee austenite (gamma) phase into the pre-existing metastable bee ferrite [delta] solid/liquid dendrite array was successfully modeled. Alloys with equal thermal driving force for growth during secondary recalescence but different solute concentrations were selected and compared. The growth velocity of stable -y into the metastable [delta]/l semi-solid (Vss ) was confirmed to be independent of undercooling and was determined to be a function of solute concentration. Because the build-up of solute ahead of the dendrite acts to slown down the growing tip, growth velocity decreases as solute concentation increases. It has been shown previously that at a given undercooling, the fee phase grows faster into the bee solid/liquid array when compared to growth into liquid alone. A growth model involving heat extraction was developed that successfully characterizes this behavior. In the model, heat is extracted from the austenite dendrite tip to the pre-exisitng ferrite solid, which acts as a heat sink. The latent heat of fusion rejected at the tip to the liquid is reduced. The solid fee is able to grow into the bee semi-solid at a faster rate because the barrier to growth is curtailed. The model predicts that the amount of heat extracted to the solid, H s, is a linear function that decreases to zero as thermal driving force increases. After heat extraction ceases. the growth velocity of austenite into semi-solid is expected to behave analogous to the growth rate into liquid. It was determined that the difference between the growth velocity into semi-solid and growth into liquid, [Delta]V, actually depends on the product of Hs and Vss , or the rate of heat extraction, J. As thermal driving force increases, both [Delta]V and J increase to the a local maximum before decreasing to zero at the same rate. The model values of Hs can be used in conjunction with existing dendrite growth theory to predict Vss. The resulting velocity for alloys with equal solute concentration is a linear function of thermal driving force, with the slope depending on the empirically determined kinetic coefficient. Experimental values and model predictions for both Hs and Vss agree well.
by Joan Elizabeth Kertz.
S.M.
McCarty, David Hughes Mary Leigh. "Durability of nitinol for structural applications". Auburn, Ala., 2006. http://repo.lib.auburn.edu/2006%20Summer/Theses/MCCARTY_DAVID_39.pdf.
Texto completoHowell, Ryan Andrew. "Microstructural influence on dynamic properties of age hardenable FeMnAl alloys". Diss., Rolla, Mo. : Missouri University of Science and Technology, 2009. http://scholarsmine.mst.edu/thesis/pdf/Howell_09007dcc80689c38.pdf.
Texto completoVita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed August 25, 2009) Includes bibliographical references.
Cunningham, David R. "Determination of residual stresses in HSLA-100 steel weldments as a function of welding parameters using x-ray diffraction". Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-11102009-020348/.
Texto completo