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Influência da adição de Nb, Ti e Zr nas propriedades de fluência da liga HP fundida por centrifugação
(Universidade Federal de São Carlos, 2014-08-05)
This work aimed to evaluate the influence caused by Nb single addition and by Nb-Ti and Nb-Zr combined addition in the high temperature mechanical properties of a centrifugally cast HP alloy. Particular investigation was ...
Síntese e sinterização de pós-compósitos de aluminaboretos de alta dureza por moagem de alta energia
(Universidade Federal de São Carlos, 2014-08-04)
This work was aimed to obtain powder composite mixtures of ceramic phases with high hardness through high energy ball milling synthesis and characterization of sintered samples in terms of hardness. In an exploratory phase, ...
Nucleação, crescimento de cristais, relaxação e escoamento viscoso em vidros de diopsídio e diborato de lítio
(Universidade Federal de São Carlos, 2014-04-23)
Heated glasses undergo a variety of kinetic processes, such as crystallization, relaxation and viscous flow, that are very important both scientifically and technologically. In this work, we measured and rigorously analyzed ...
Influência de defeitos nas propriedades mecânicas de juntas soldadas por FSW da liga AA6013-T6
(Universidade Federal de São Carlos, 2009-04-28)
In 1991, it was developed a solid state welding process called Friction Stir Welding - FSW, intended to increase the number of applications for the aluminum and its alloys. As every welding process the presence of defects ...
Efeito do (NaLix)CO3, COM 0 ≤ x ≤ 2, na sinterização e condutividade elétrica do Ce0,8Gd0,2O1,9
(Universidade Federal de São Carlos, 2014-11-26)
The principles of operation of Solid Oxide Fuel Cells (SOFC) and Molten Carbonate Fuel Cells (MCFC) were merged to create a hybrid device, which can combine the advantages and reduce the disadvantages of both cells, improving ...
Desenvolvimento de um método para levantamento de tecnologias de materiais empregados no trem de força automotivo (powertrain) a partir de patentes
(Universidade Federal de São Carlos, 2012-05-27)
This research approaches the study from patents of technologies for materials used in power train of motor vehicles, to provide additional information in order to support decision making in this universe, especially in the ...
Caracterização microestrutural e modelagem do amaciamento dinâmico a quente do aço inoxidável austenítico ASTM F 138, utilizado em implantes ortopédicos
(Universidade Federal de São Carlos, 2014-07-10)
Flow stress curves of ASTM F 138 austenitic stainless steel were obtained through isothermal hot torsion testing in the temperature range of 900- 1200oC and in the strain rate range of 0,01-10s-1, totaling 24 experiments. ...
Ligas metálicas amorfas: um novo método de predição de composição com capacidade de formação de amorfos
(Universidade Federal de São Carlos, 2014-02-21)
This thesis presents the development of a new criterion which can indicate new compositions for amorphous metallic alloys. This new criterion was based on dense packing of spheres combined with the lambda criterion through ...
Caracterização da liga amorfa Cu36Ti34Zr22Ni8 processada termomecanicamente
(Universidade Federal de São Carlos, 2015-03-31)
Glass forming ability (GFA) is one of the big issues to obtain large bulk metallic glasses, which are composed of three or more elements. Regardless of an increasing theoretical understanding of glass formation, taking a ...
Efeito químico de aditivos em suspensões aquosas de magnésia para potenciais aplicações em concretos refratários
(Universidade Federal de São Carlos, 2015-02-05)
Magnesium oxide is an important subject of investigation because of its physical and chemical properties, mainly for its application to refractory ceramics. However, magnesium oxide hydration generates its hydroxide, ...