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Sökning: LAR1:ltu > (2010-2019) > Bokkapitel

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1.
  • Aarrevaara, Timo, et al. (författare)
  • Introduction
  • 2014
  • Ingår i: Higher Education and Research in Academe. - Luleå : Luleå tekniska universitet. - 9789174399745 - 9789174399752 ; , s. 11-17
  • Bokkapitel (övrigt vetenskapligt/konstnärligt)
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2.
  • Abrahamsson, Lena, et al. (författare)
  • Avslutning
  • 2013
  • Ingår i: Lean i arbetslivet. - Stockholm : College of Liberal Arts and Sciences. - 9789147105601 ; , s. 317-325
  • Bokkapitel (övrigt vetenskapligt/konstnärligt)
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7.
  • Abrahamsson, Lena (författare)
  • När det omöjliga blev möjligt
  • 2014
  • Ingår i: Glimtar av jämställdhet. - Umeå : Boréa bokförlag AB. - 9789189140868 ; , s. 201-227
  • Bokkapitel (övrigt vetenskapligt/konstnärligt)
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8.
  • Agelet de Saracibar, Carlos, et al. (författare)
  • Shaped Metal Deposition Processes
  • 2014
  • Ingår i: Encyclopedia of Thermal Stresses. - Dordrecht : Encyclopedia of Global Archaeology/Springer Verlag. - 9789400727380 ; , s. 4347-4355
  • Bokkapitel (refereegranskat)abstract
    • The shaped metal deposition (SMD) process is a novel manufacturing technology which is similar to the multi-pass welding used for building features such as lugs and flanges on components [1–7]. This innovative technique is of great interest due to the possibility of employing standard welding equipment without the need for extensive new investment [8, 9]. The numerical simulation of SMD processes has been one of the research topics of great interest over the last years and requires a fully coupled thermo-mechanical formulation, including phase-change phenomena defined in terms of both latent heat release and shrinkage effects [1–6]. It is shown how computational welding mechanics models can be used to model SMD for prediction of temperature evolution, transient, as well as residual stresses and distortions due to the successive welding layers deposited. Material behavior is characterized by a thermo-elasto-viscoplastic constitutive model coupled with a metallurgical model [6]. Two different materials, nickel superalloy 718 [6] and titanium Ti-6Al-4 V [7], are considered in this work. Both heat convection and heat radiation models are introduced to dissipate heat through the boundaries of the component. The in-house-developed coupled thermo-mechanical finite element (FE) software COMET [10] is used to deal with the numerical simulation, and an ad hoc activation methodology is formulated to simulate the deposition of the different layers of filler material.
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9.
  • Ahmed, Hesham, et al. (författare)
  • Recent Trends in Ironmaking Blast Furnace Technology to Mitigate CO2 Emissions : Top Charging Materials
  • 2016
  • Ingår i: Ironmaking and Steelmaking Processes. - Cham : Springer International Publishing. - 9783319395272 - 9783319395296 ; , s. 101-124
  • Bokkapitel (refereegranskat)abstract
    • The iron- and steelmaking is the largest energy consuming in the industrial sectors. The high energy consumption is associated with emission of CO 2and other pollutants. The most common ironmaking process used in the world is the blast furnace which contributes around 70 % of the world’s steel production. Recently, blast furnace has undergone tremendous modifications and improvements to reduce the energy consumption and CO 2emissions. The modifications are being focused on two main approaches: (1) development of top charging materials and (2) injections of auxiliary fuels through blast furnace tuyeres. The present chapter will discuss the recent modifications and development in the top charging burden and how it could participate in minimizing the energy consumption and CO 2emissions for more efficient and sustainable iron and steel industry. The injection of auxiliaryfuels will be discussed in details in another chapter. The enhancement of burden material quality and its charging mode into the blast furnace has resulted in a smooth and efficient operation. Recently, the usage of nut coke in the modern blast furnace is accompanied by higher production and lower reducing agent rates. An efficient recycling of in-plant fines by its conversion into briquettes with proper mechanical strength is applied in some blast furnaces to exploit the iron- and carbon-rich residues. Nowadays, novel composite agglomerates consist of iron ores and alternative carbonaceous materials represent a new trend for low-carbon blast furnace with lower dependence on the conventional burden materials. The recent investigations demonstrated that the novel composites are able to reduce the thermal reserve zone temperature in the blast furnace and consequently enhance the carbon utilization through its higher reactivity compared to fossil fuels. The top charging of bioreducers and hydrogen-rich materials into the blast furnace is one of interesting innovations to mitigate the CO 2emissions. Although some of previous approaches are recently applied in the modern blast furnace, others are still under intensive discussions to enhance its implementations.
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10.
  • Aho, Seppo, et al. (författare)
  • Tourism : history
  • 2016
  • Ingår i: Encyclopedia of the Barents Region. - Oslo : Pax Forlag. - 9788253038599 ; , s. 401-400
  • Bokkapitel (refereegranskat)
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