Relevant bibliographies by topics / Metallurgical science / Dissertations / Theses
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Dissertations / Theses on the topic 'Metallurgical science'

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Published: 5 June 2025
Last updated: 2 August 2025

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1

Jenkins, Neil Travis 1973. "Chemistry of airborne particles from metallurgical processing." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/17033.

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Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2003.<br>Vita.<br>Includes bibliographical references.<br>Airborne particles fall into one of three size ranges. The nucleation range consists of nanoparticles created from vapor atom collisions. The decisive parameter for particle size and composition is the supercooling of the vapor. The accumulation range, which comprises particles less than 2 micrometers, consists of particles formed from the collision of smaller primary particles from the nucleation range. The composition of agglomerates and
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2

King, Matthew Joseph. "Control and optimization of metallurgical sulfuric acid plants." Diss., The University of Arizona, 1999. http://hdl.handle.net/10150/284812.

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The pyrometallurgical processing of copper concentrates produces SO₂-bearing offgas. SO₂ in the offgas is catalytically oxidized to SO₃ and absorbed into a ∼98.5% H₂SO₄-H₂O mixture in a sulfuric acid plant. This research provides an analysis of a copper smelter sulfuric acid plant and discusses the control and optimization necessary to attain the following goals: (a) minimize smelter SO₂ emissions; (b) maximize acid plant capacity and availability. The objectives of this work are to: (a) prepare mathematical descriptions of sulfuric acid plant operations; compare the mathematical predictions w
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3

Bernardis, Sarah. "Engineering impurity behavior on the micron-scale in metallurgical-grade silicon production." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/101457.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 2012.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (pages 127-137).<br>Impurities are detrimental to silicon-based solar cells. A deeper understanding of their evolution, microscopic distributions, and oxidation states throughout the refining processes may enable the discovery of novel refini
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4

Papakirillou, Ismini. "A metallurgical study of West African iron monies from Cameroon and Liberia." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/55263.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2009.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 200-202).<br>The aim of this thesis is to make a contribution to the study of West African iron monies through examination and analysis of a group of these objects in the collection of the Peabody Museum of Archaeology and Ethnology at Harvard University. The selection of objects from the collection includes five distinct types, representing different sizes and shapes that have been identified as monies/excha
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5

Martello, Robert 1968. "Paul Revere's metallurgical ride : craft and proto-industry in early America." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/109637.

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6

Nordgren, Eric. "The effect of metallurgical structure on the chloride-induced corrosion of archaeological wrought iron." Thesis, Cardiff University, 2016. http://orca.cf.ac.uk/97535/.

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Archaeological wrought iron artefacts are subject to damaging corrosion while in the burial environment and when subjected to environmental changes after excavation. The role of water, oxygen, and chloride corrosion accelerators are central to iron corrosion processes. Intrinsic factors such as the amount and distribution of slag in wrought iron may also play a role in corrosion processes. This study examined a range of factors that impact on understanding conservation desalination treatments to mitigate corrosion by removing chlorides. While examining the effect of slag on corrosion rate and
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7

Cooney, Elizabeth Myers. "Bronze metallurgy in Iron Age central Europe : a metallurgical study of Early Iron Age bronzes from Stična, Slovenia." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/39480.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2007.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Includes bibliographical references (v. 2, p. 375-377).<br>The Early Iron Age (750-450 BCE) marks a time in the European Alpine Region in which cultural ideologies surrounding bronze objects and bronze production were changing. Iron was becoming the preferred material from which to make many utilitarian objects such as weapons and agricultur
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8

Duffey, Matthew James. "Metallurgical Characterization and Weldability Evaluation of Ferritic and Austenitic Welds in Armored Steels." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1460910681.

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9

Jönsson, Martin. "The Atmospheric Corrosion of Magnesium Alloys : Influence of Microstructure and Environments." Doctoral thesis, KTH, Kemi, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4545.

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The low density and high specific strength of magnesium alloys have created a great deal of interest in the use of these alloys in the automotive and aerospace industries and in portable electronics. All of these industries deal with applications in which weight is extremely important. However, an obstacle to overcome when using magnesium alloys in engineering applications are their unsatisfactory corrosion properties. This thesis is devoted to the atmospheric corrosion of the two magnesium alloys AZ91D and AM50, in particular the ways the microstructure and exposure parameters of these alloys
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10

Payton, Eric John. "Characterization and Modeling of Grain Coarsening in Powder Metallurgical Nickel-Based Superalloys." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1250265477.

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11

Fernández, Reyes Pablo. "Metallurgical characterisation of 1st and 2nd century AD Roman copper-alloy military equipment from north-western Europe." Thesis, University of Liverpool, 2014. http://livrepository.liverpool.ac.uk/2003529/.

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Roman military equipment has traditionally been studied from a typological perspective based on a linear concept of change. Whilst Roman alloys have been analysed scientifically and general studies on them have been published, analysis of military equipment has been scarce and mostly secluded as part of excavation reports of individual sites. Scientific analysis though, can provide independent ways of studying military equipment. It can answer questions about production and distribution of the raw materials and finished objects and is capable of informing on reasons for technological choices (
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12

Boster, Connor M. Boster. "Metallurgical Characterization and Testing of Dissimilar Metal Welds for Service in Hydrogen Containing Environments." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1524179509481363.

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13

Semykina, Anna. "Recovery of iron and manganese values from metallurgical slags by the oxidation route." Doctoral thesis, KTH, Materialens processvetenskap, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-24534.

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In the modern practice, a sustainable development strategy in a domain of wasteutilization is shifting its focus from a general completeness of recycling to a morespecific attention to efficiently utilize elements in the wastes. This is well-illustrated bythe steelmaking slag industries. The major waste product from the steelmaking practiceis slag and its main constituents are: CaO, SiO2, Al2O3, MnO, FeO and so on. The mainfield of application for the steelmaking slags is civil engineering, especially for road andwaterway construction. However, a significant amount of the slag remains in the d
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14

Muwanguzi, Abraham Judah Bumalirivu. "Characterisation of Muko iron ores (Uganda( for defferent routes of iron production." Licentiate thesis, KTH, Materialvetenskap, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-25037.

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Iron and its products, especially the various forms of steel, have been and still are a vital material in many sectors of life. It is utilized in many industrial activities ranging from production of heavy duty mechanical equipment to light electrical appliances and home appliances. With the world‟s iron ore consumption estimated to stand at 1.3 billion tonnes by 2025, exploitation of any existing natural deposits is of increasing importance to meet the demands of the expanding world economy. Large deposits of iron ore exist in Uganda in the eastern (Tororo) regions and south-western (Kisoro-K
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15

Zhang, Zhi. "A study of flow fields during filling of a sampler." Licentiate thesis, KTH, Materials Science and Engineering, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-10693.

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<p>More and more attention has been paid to decreasing the number and size of non-metallic inclusions existing in the final products recently in steel industries. Therefore, more efforts have been made to monitor the inclusions' size distributions during the metallurgy process, especially at the secondary steelmaking period. A liquid sampling procedure is one of the commonly applied methods that monitoring the inclusion size distribution in ladles, for example, during the secondary steelmaking. Here, a crucial point is that the steel sampler should be filled and solidified without changing the
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16

Matsie, Simon Sello. "Impact of metallurgical industries on water." Thesis, Vaal University of Technology, 2012. http://hdl.handle.net/10352/391.

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The increase in industrial activities has contributed towards an increase in environmental pollution problems. Many ecosystems have deteriorated as a result of an accumulation of pollutants including heavy metals contained in effluents discharged from various industrial processes. Legislative standards require that pollutant levels be controlled to fall within set limits. The World Health Organisation (WHO) states that the following metals: aluminium, chromium, manganese, iron, cobalt, nickel, copper, cadmium, mercury and lead are a concern. The research has focussed on the removal of heavy m
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17

Wang, Haijuan. "Investigations on the Oxidation of Iron-chromium and Iron-vanadium Molten Alloys." Doctoral thesis, KTH, Materialens processvetenskap, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-12955.

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With the progress of high alloy steelmaking processes, it is essential to minimize the loss of valuable metals, like chromium and vanadium during the decarburization process, from both economic as well as environmental view points. One unique technique to realize this aim, used in the present work, is the decarburization of high alloy steel grades using oxygen with CO2 in order to reduce the partial pressure of oxygen. In the present work, the investigation on the oxidation of iron-chromium and iron-vanadium molten alloys under CO2-O2 mixtures was carried out and presented in this dissertation
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18

Cai, Zhuo. "Metallurgical structures, in vitro corrosion resistance and biocompatibility of high-palladium dental casting alloys." The Ohio State University, 1996. http://catalog.hathitrust.org/api/volumes/oclc/48171767.html.

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Thesis (M.A.)--Ohio State University, 1997.<br>Advisor: William A. Brantley, Dept. of Oral Biology. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.
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19

Stella, Piergiorgio. "Powder metallurgy: investigation of metallurgical and technological aspects and potential applications for critical components of turbomachineries." Doctoral thesis, Università degli studi di Trento, 2016. https://hdl.handle.net/11572/369124.

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The application of powder metallurgy (PM) technologies to the manufacturing of Oil & Gas turbomachineries’ components was investigated in the course of research collaboration with the Material and Processes Engineering Department of General Electric Oil & Gas (Italy). The thesis focused on the study of the pressure-assisted Hot Isostatic Pressing technology for the processing of the corrosion resistant Ni-base alloy N07626. The densification behaviour of the N07626 metal powder in condition of pressure assisted sintering was investigated by experiments conducted on a small scale by uniaxial
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20

Stella, Piergiorgio. "Powder metallurgy: investigation of metallurgical and technological aspects and potential applications for critical components of turbomachineries." Doctoral thesis, University of Trento, 2016. http://eprints-phd.biblio.unitn.it/1688/1/PhD_tesi_STELLA.pdf.

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The application of powder metallurgy (PM) technologies to the manufacturing of Oil & Gas turbomachineries’ components was investigated in the course of research collaboration with the Material and Processes Engineering Department of General Electric Oil & Gas (Italy). The thesis focused on the study of the pressure-assisted Hot Isostatic Pressing technology for the processing of the corrosion resistant Ni-base alloy N07626. The densification behaviour of the N07626 metal powder in condition of pressure assisted sintering was investigated by experiments conducted on a small scale by uniaxial ho
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21

Liu, Jikai. "Influence of metallurgical phase transformation on crack propagation of 15-5PH stainless steel and 16MND5 low carbon steel." Phd thesis, INSA de Lyon, 2012. http://tel.archives-ouvertes.fr/tel-00833206.

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Ou study focuses on the effects of phase transformations on crack propagation. We want to understand the changes of fracture toughness during welding. In this work, fracture toughness is expressed by J-integral. There are many experimental methods to obtain the critical toughness JIC but they are impractical for our investigation during phase transformation. That is the reason why we have proposed a method coupling mechanical tests, digital image correlation and finite element simulation. The fracture tests are implemented on pre-cracked single edge notched plate sample which is easy for machi
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22

Vicente, Nerio. "Spark Plasma Sintering of Titanium and Cobalt Alloys For Biomedical Applications." Doctoral thesis, Università degli studi di Trento, 2012. https://hdl.handle.net/11572/369162.

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This work was carried out in the frame of an industrial research project in cooperation with the Eurocoating SpA and K4Sint Srl, aiming at developing the commercial pure titanium, the Ti-6Al-4V and the Co-28Cr-6Mo alloys by Spark Plasma Sintering (SPS) for biomedical application. The definition of the process parameters for the production of a highly porous (cp-Ti), full density materials (Ti-6Al-4V and Co-28Cr-6Mo), and their combination in a surface functionalized full density substrate was the central focus. The SPS parameters were optimized to obtain the Co-28Cr-6Mo alloy in full density s
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23

de, Oliveira Botelho Pedro Augusto. "Biodegradable stents made of pure Mg and AZ91 alloy through SPS sintering." Doctoral thesis, Università degli studi di Trento, 2015. https://hdl.handle.net/11572/367666.

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The implantation of stents is an effective procedure to unblock the arteries of patients with serious heart problems. Traditionally, stents are made of inert materials such as stainless steel and titanium alloys. It has been shown that the traditional stents can cause restenosis or thrombosis. In recent years the proposal of biodegradable stents is attracting the interest of the industry and the research, since the stent is mechanically needed only in the first year, eliminating the problems caused by the long duration of the implant. Magnesium (Mg) alloys are of increasing interest because of
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24

Xing, Sujie. "Environmentally friendly baths for Cu-Sn co-electrodeposition: cyanide-free aqueous bath and deep eutectic solvents." Doctoral thesis, Università degli studi di Trento, 2014. https://hdl.handle.net/11572/367615.

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This thesis describes the work of my Ph.D studies in Industrial Engineering during past three years. It regards preparation of copper-tin alloys from green solvents for decorative purposes. Actual industrial process involves cyanide based complex bath in order to produce white bronze layers and they often contain lead as brightener and whitener. The aim of the thesis is to develop a more environmental friendly process for white bronze electrodeposition. Two different electrolytes were considered as eligible candidates: one involves a simple organic acid aqueous solution as bulk electrolyte, an
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25

Deirmina, Faraz. "Novel PM Tool Steel with improved hardness and toughness." Doctoral thesis, Università degli studi di Trento, 2017. https://hdl.handle.net/11572/368422.

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Ultrafine grained (~ 1μm) steels have been the subject of extensive research work during the past years. These steels generally offer interesting perspectives looking for improved mechanical properties. UFG Powder Metallurgy hot work tool steels (HWTS) can be fabricated by high energy mechanical milling (MM) followed by spark plasma sintering (SPS). However, similarly to most UFG and Nano-Crystalline (NC) metals, reduced ductility and toughness result from the early plastic instabilities in these steels. Industrialization of UFG PM Tool Steels requires the application of specific metallurgica
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26

Federici, Matteo. "Study of Wear Mechanisms in Braking Systems with HVOF-Coated Discs." Doctoral thesis, Università degli studi di Trento, 2019. https://hdl.handle.net/11572/368577.

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The European Union has undertaken several efforts to reduce the non-exhaust particulate matter emissions from road vehicles. One of the major sources of these emissions is the wear of brake pads and discs. The experimental work presented in this thesis has been performed within the European project called LOWBRASYS that aims at reducing the particulate matter emissions due to the wear of the components of braking systems. Different strategies have been identified for reaching this aim but the present work focuses on the investigation of the wear mechanisms at the disc-pad interface and on thei
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27

Vicente, Nerio. "Spark Plasma Sintering of Titanium and Cobalt Alloys For Biomedical Applications." Doctoral thesis, University of Trento, 2012. http://eprints-phd.biblio.unitn.it/783/1/PhD_THESIS_-_N.Vicente_Jr_-_revised.pdf.

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This work was carried out in the frame of an industrial research project in cooperation with the Eurocoating SpA and K4Sint Srl, aiming at developing the commercial pure titanium, the Ti-6Al-4V and the Co-28Cr-6Mo alloys by Spark Plasma Sintering (SPS) for biomedical application. The definition of the process parameters for the production of a highly porous (cp-Ti), full density materials (Ti-6Al-4V and Co-28Cr-6Mo), and their combination in a surface functionalized full density substrate was the central focus. The SPS parameters were optimized to obtain the Co-28Cr-6Mo alloy in full density s
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28

de, Oliveira Botelho Pedro Augusto. "Biodegradable stents made of pure Mg and AZ91 alloy through SPS sintering." Doctoral thesis, University of Trento, 2015. http://eprints-phd.biblio.unitn.it/818/1/Thesis_Pedro_Augusto_O._Botelho.pdf.

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The implantation of stents is an effective procedure to unblock the arteries of patients with serious heart problems. Traditionally, stents are made of inert materials such as stainless steel and titanium alloys. It has been shown that the traditional stents can cause restenosis or thrombosis. In recent years the proposal of biodegradable stents is attracting the interest of the industry and the research, since the stent is mechanically needed only in the first year, eliminating the problems caused by the long duration of the implant. Magnesium (Mg) alloys are of increasing interest because of
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29

Xing, Sujie. "Environmentally friendly baths for Cu-Sn co-electrodeposition: cyanide-free aqueous bath and deep eutectic solvents." Doctoral thesis, University of Trento, 2014. http://eprints-phd.biblio.unitn.it/1326/1/Xing-thesis.pdf.

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This thesis describes the work of my Ph.D studies in Industrial Engineering during past three years. It regards preparation of copper-tin alloys from green solvents for decorative purposes. Actual industrial process involves cyanide based complex bath in order to produce white bronze layers and they often contain lead as brightener and whitener. The aim of the thesis is to develop a more environmental friendly process for white bronze electrodeposition. Two different electrolytes were considered as eligible candidates: one involves a simple organic acid aqueous solution as bulk electrolyte, an
APA, Harvard, Vancouver, ISO, and other styles
30

Deirmina, Faraz. "Novel PM Tool Steel with improved hardness and toughness." Doctoral thesis, University of Trento, 2017. http://eprints-phd.biblio.unitn.it/2616/1/Thesis_Faraz_Deirmina_eprints.pdf.

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Ultrafine grained (~ 1μm) steels have been the subject of extensive research work during the past years. These steels generally offer interesting perspectives looking for improved mechanical properties. UFG Powder Metallurgy hot work tool steels (HWTS) can be fabricated by high energy mechanical milling (MM) followed by spark plasma sintering (SPS). However, similarly to most UFG and Nano-Crystalline (NC) metals, reduced ductility and toughness result from the early plastic instabilities in these steels. Industrialization of UFG PM Tool Steels requires the application of specific metallurgical
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31

Federici, Matteo. "Study of Wear Mechanisms in Braking Systems with HVOF-Coated Discs." Doctoral thesis, University of Trento, 2019. http://eprints-phd.biblio.unitn.it/3544/1/Doctoral-Thesis-Matteo-Federici.pdf.

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The European Union has undertaken several efforts to reduce the non-exhaust particulate matter emissions from road vehicles. One of the major sources of these emissions is the wear of brake pads and discs. The experimental work presented in this thesis has been performed within the European project called LOWBRASYS that aims at reducing the particulate matter emissions due to the wear of the components of braking systems. Different strategies have been identified for reaching this aim but the present work focuses on the investigation of the wear mechanisms at the disc-pad interface and on thei
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32

Schutz-Kuchly, Thomas. "Investigation du silicium de qualité solaire de type n pour la fabrication de cellules photovoltaïques." Phd thesis, Aix-Marseille Université, 2011. http://tel.archives-ouvertes.fr/tel-00809386.

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Ce travail étudie le potentiel du silicium de type n purifié par voie métallurgique pour la fabrication de cellules photovoltaïques à bas coût. Les teneurs élevées en dopants conduisent à de faibles valeurs de résistivité, ainsi qu'à une diminution de la durée de vie des porteurs de charge. La fabrication de cellules photovoltaïques a permis d'obtenir des rendements de conversion variant de 13.7% à 15.0% sur 148.6cm². Avec un procédé de fabrication amélioré, des rendements de 16.0% pourraient être obtenus. La résistivité des plaquettes a été identifiée comme facteur limitant les performances d
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33

Saccarola, Stefano. "Micropolveri e nanopolveri: studi di processo e caratterizzazione." Doctoral thesis, Università degli studi di Padova, 2008. http://hdl.handle.net/11577/3426722.

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This PhD thesis collects the main works performed during the doctorate. The sector has been the powder metallurgy, treating both micrometric size powder that nanostructured and nano-dimensional powder. About micrometric powders were analyzed and characterized non-ferrous pow-der(copper, bronze and brass) to estimate the feasibility use in structural pieces. Moreover were produced, through an experimental atomization, two types of iron powders containing chromium, prealloyed with other elements such as nickel and molybdenum. The chromium high affinity with oxygen resulted in significant execu
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Cazzolli, Marco. "Co-sintering of a metal injection overmolded bi-metallic part." Doctoral thesis, Università degli studi di Trento, 2015. https://hdl.handle.net/11572/369077.

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A metal injected component was produced by overmolding technique. To reach a good result differebnt powder matching were studied. The final mechanical properties and corrosion resistance of the interface microstructure were investigated.
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Cazzolli, Marco. "Co-sintering of a metal injection overmolded bi-metallic part." Doctoral thesis, University of Trento, 2015. http://eprints-phd.biblio.unitn.it/1453/1/Ph.D._Thesis_Marco_Cazzolli_University_of_Trento_formato_a5.pdf.

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A metal injected component was produced by overmolding technique. To reach a good result differebnt powder matching were studied. The final mechanical properties and corrosion resistance of the interface microstructure were investigated.
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36

GOUTSOU, PERRAKI VASSILIKI. "Contribution a l'etude des cellules solaires epitaxiees sur si metallurgique." Paris 7, 1988. http://www.theses.fr/1988PA077138.

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Des photopiles p**(+)pn**(+) ont ete fabriquees par depot epitaxique d'une couche mince de si ultrapur sur un substrat sommairement purifie (umg) p**(+), puis formation de la couche n**(+), des contacts metalliques et de la couche antireflet par serigraphie. Mesures de la longueur de diffusion ln (methode lbic) et de la reponse spectrale des cellules
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Caliari, Daniele. "Development and optimization of surface hardening treatments and anodizing processes." Doctoral thesis, Università degli studi di Padova, 2018. http://hdl.handle.net/11577/3422679.

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The optimization of metallic solid surfaces is one of the greatest industrial challenges about surface engineering. Surface hardening treatments are applied to improve the wear resistance of parts without affecting the more tough and soft core of the treated substrates. This doctoral work is focused on the study of gaseous multistage oxynitrocarburizing treatments for low carbon steels and hard-anodizing processes applied on aluminum HPDC components. There is still a lack of knowledge both in literature and in industry about these treatments. The aim of this work is to investigate the micros
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Perez, Demydenko Camilo. "Static and dynamic disorder in nanocrystalline materials." Doctoral thesis, Università degli studi di Trento, 2019. https://hdl.handle.net/11572/368145.

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Peak profiles in X-ray Diffraction (XRD) patterns from nanocrystalline materials are affected by static and dynamic disorder which is specific of the size and shape of the nanocrystalline domains. Owing to their intrinsic differences, the two types of disorder can be separated, providing independent information from the modelling of the XRD patterns. In the present thesis a model for the static strain created by the nanoparticle surface is proposed. The model is built within the frame of the Whole Powder Pattern Modelling (WPPM) approach for XRD line profile analysis, developed at the Universi
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Perez, Demydenko Camilo. "Static and dynamic disorder in nanocrystalline materials." Doctoral thesis, University of Trento, 2019. http://eprints-phd.biblio.unitn.it/3636/1/CAMILO_PEREZ_DEMYDENKO_thesis_PhD.pdf.

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Peak profiles in X-ray Diffraction (XRD) patterns from nanocrystalline materials are affected by static and dynamic disorder which is specific of the size and shape of the nanocrystalline domains. Owing to their intrinsic differences, the two types of disorder can be separated, providing independent information from the modelling of the XRD patterns. In the present thesis a model for the static strain created by the nanoparticle surface is proposed. The model is built within the frame of the Whole Powder Pattern Modelling (WPPM) approach for XRD line profile analysis, developed at the Universi
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40

Delgado, Vega José Manuel. "Apport des modèles géo-métallurgiques et de la catégorisation des ressources à la définition de la fosse ultime d'une mine à ciel ouvert : Application à la mine de cuivre de Mantos de la Luna au Chili." Electronic Thesis or Diss., Paris, ENMP, 2012. http://www.theses.fr/2012ENMP0094.

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La nécessité de maximiser la récupération d'une ou plusieurs espèces utiles d'un gisement du cuivre, l´optimisation des consommations d'additifs dans le processus de traitement métallurgique, savoir où laisser les matériaux qui dans le futur pourraient être valorisés par une série de nouvelles opérations etc., conduit à adapter la planification minière aux caractéristiques géologiques et métallurgiques du gisement.Les unités géo-métallurgiques sont déterminées par une combinaison des principaux paramètres géologiques, type de roche, altération, minéralisation, etc. Chaque unité présente un com
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Noecker, Fredrick F. II. "Metallurgical investigation into ductility dip cracking in nickel based alloys." 2007. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3285743.

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Islam, Rashed Adnan. "Composition - microstructure - property relationships in dual phase bulk magnetoelectric composite." 2008. http://hdl.handle.net/10106/957.

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Dutta, Surajeet Kumar. "Study of the Chemical Composition and Energy value of Woody Biomass Species." Thesis, 2008. http://ethesis.nitrkl.ac.in/121/1/surajeet.pdf.

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In spite of its natural sources, India depends on other countries in terms of energy production, and a transfer from conventional fossil sources to sustainable energy sources is strongly necessary because due to the increasing demand of the energy. Among the sustainable energy sources, biomass is the subject of this study. The characteristics, logistic aspects, environmental aspects, economical, legal and technical aspects are investigated in order to show that the possible biomass co-firing is very important for the construction of economic, sustainable and environmentally friendly energy sys
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Mishra, Barun, and Sandeep Kumar Baliarsingh. "Kinetics of Iron Ore Reduction by Coal and Charcoal." Thesis, 2008. http://ethesis.nitrkl.ac.in/124/1/10404014.pdf.

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In the present investigation, an attempt has been done to study the simultaneous effects of the major processing variables on the extent of reduction of iron ore pellets surrounded by coal or charcoal fines in an externally heated cylindrical steel container (diameter 5cm and height 10cm) placed in muffle furnace. The project goal is to compare the reduction potential of coal and charcoal in reduction of iron ore pellets. Wood charcoal contains very low levels of gangue, sulphur and volatile matter therefore, presenting itself as a very desirable reductant for the reduction of iron ore. The va
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Krishnan, Tintula, and Subhram Keshary Singh. "Reduction Kinetics of iron ore pellets and the effect of Binders." Thesis, 2008. http://ethesis.nitrkl.ac.in/125/1/10404011.pdf.

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Reduction of Iron Ore Pellets with a particular percentage of binders i.e. 2% of Dextrine and 2% of Bentonite was carried out for the temperature range 900 to 1050°C. In reduction kinetic study the most satisfactory model was to taken, the slope of the initial linear region of fractional reduction vs. time curve was measured, which gives the rate constant (k). Ln k vs. 1/T plots were straight line from which Activation Energy was calculated. Pellets having different percentages of binders were reduced and compared to find the effect of binders
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Gaur, Ankur. "Effect of Strain Ageing On Welded or Nonwelded Low Carbon Steel." Thesis, 2009. http://ethesis.nitrkl.ac.in/1157/1/strain_ageing.pdf.

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An investigation has been performed on the strain ageing of welded and non-welded specimen of low carbon steel. It was determined that the low carbon steel were susceptible to strain ageing in interstitial solutes. The increase in yield strength, tensile strength and elongation because of strain ageing has been compared between welded and non-welded specimen. At high level of prestrain, the percentage loss in ductility was observed. Increase in the strain-ageing temperature the value of ΔY increased, increase the time of ageing has also got influence on value of ΔY. However the influence of te
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Arvind, K. "J-R Behaviour of 20MnMoNi55 Pressure Vessel Steel." Thesis, 2009. http://ethesis.nitrkl.ac.in/1395/2/bmdthesis.pdf.

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Material of Reactor Pressure Vessel (RPV) should have good fracture toughness to ensure safe operation of nuclear reactor. In order to be on safe side the fracture characteristics of RPV material have to be quantified. In this present work the fracture characteristics of 20MnMoNi55 steel – the material used for Indian PHWR – have been found using J-Integral test. The microstructures of the steel and its relevant mechanical properties such as hardness and tensile properties have been characterized. Monotonic J-R curves of the material have been determined in the temperature of and . Fracture
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Akarapu, Ashok. "Surface Property Modification of Copper by Nanocomposite Coating." Thesis, 2011. http://ethesis.nitrkl.ac.in/2778/1/Ashok_thesis_final.pdf.

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Copper has high electrical and thermal conductivities, good corrosion resistance at ambient temperature, excellent malleability/workability and reproducibility, apart from these it is cheap and abundantly available metal other than good conducting metals like Silver. But has poor mechanical properties such as hardness and wear resistance. Some applications like Contacts in electrical switches necessitate the improvements in the mechanical properties without much loss of electrical and thermal conductivities. Bulk modification / alloying have been tried but limitations in alloying and adversel
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Madhukar, Poloju. "Synthesis and Characterization of ZnO Nanostructures and Synthesis of Zn/Al2O3 Nanocomposite by Mechanical Alloying Route." Thesis, 2011. http://ethesis.nitrkl.ac.in/2785/1/madhukar_thesis.pdf.

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We report simple methods to synthesize Zinc oxide nanostructures, without using catalysis with less complicity. This was done by oxidation of zinc foil at various temperatures (200oC-1000oC) and various times (1-3h) and also we find that the nanostructures size and shape depends on heating rate, temperature and heating time. Apart from oxidation of zinc we also find zinc oxide nanostructures in Zn-C dry battery. This nanostructure is formed on inner surface of Zn container (which acts as anode). These nanostructures are formed due reaction between electrolyte (mixture composed of manganese (IV
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Verma, Preeti. "Ratcheting Fatigue Behaviour and Post-fatigue Tensile Properties of Commercial Aluminium." Thesis, 2011. http://ethesis.nitrkl.ac.in/2788/1/Final_thesis-Preeti.pdf.

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This investigation examines the ratcheting fatigue behaviour and post-fatigue tensile properties of commercial aluminium in annealed and normalised condition. Ratcheting is the phenomena of progressive accumulation of permanent deformation when a component is subjected to asymmetric cyclic loading which also causes variation in their mechanical properties. One set of commercial aluminium rods were annealed by soaking the as received rods at 200°C for 30 minutes prior to machining and other set were normalised up to same temperature with same soaking time. The microstructural examinations were
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