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Trincamento induzido por hidrogênio em aços inoxidáveis supermartensíticos modificados pela ação de boro para aplicação em exploração de petróleo em águas profundas
(Universidade Federal de São Carlos, 2015-09-21)
The oil exploitation and production in deep water involves drilling risers with over 7 km deep. In this condition, the environments found in such wells are too adverse, acting under the exploration and production equipment, ...
Análise comparativa de fadiga mecânica em compósitos de polipropileno com talco e com nanoargila
(Universidade Federal de São Carlos, 2010-05-17)
Talc is a well known lamellar mineral filler much used for mechanical reinforcement of polypropylene (PP) composites. Mineral nanoclay is also a lamellar filler that is gaining much interest due to its reinforcement effect ...
Avaliação do dano por choque térmico em concretos refratários via espectroscopia acústica ressonante não-linear
(Universidade Federal de São Carlos, 2012-03-02)
In this thesis the Non-linear Resonant Acoustic Spectroscopy Technique used to evaluate the mesoscopic non-linearity was incorporated into the Impulse Excitation Technique, which is extensively applied to the evaluation ...
Estudo da solidificação do aço rápido M2 em diferentes lingotes e seus efeitos na microestrutura e propriedades mecânicas finais
(Universidade Federal de São Carlos, 2011-08-03)
The high speed steels are mostly applied in cutting tools, like drills, cores and top milling cutter. Its microstructure is composed by martensite, with high hardness, strong tempering resistance and disperses carbides on ...
Estudo das propriedades mecânicas do aço ao boro 50B35 com diferentes tamanhos de grãos
(Universidade Federal de São Carlos, 2015-07-22)
Boron steel has excellent hardenability due to the addition of small quantities of
boron. Boron atoms reduces the nucleation rate of ferrite and bainite [1]. It is
known that austenitizing temperature and time and cooling ...
Comportamento mecânico em fadiga da liga de titânio beta metaestável Ti-5553
(Universidade Federal de São Carlos, 2016-10-14)
The microstructure of metastable beta Ti alloys is a decisive factor that
governs their properties and, therefore, the assessment of the relation between
the microstructure and the fatigue response means an advance in ...
Estudo do processo de soldagem a ponto por fricção de juntas dissimilares entre ligas de alumínio e titânio
(Universidade Federal de São Carlos, 2016-12-09)
Multimaterial structures between aluminum and titanium alloys are a
technologically attractive field of research and their increasing use in the
transportation sector for weight and emission reduction is part of the ...
Microestrutura e propriedades mecânicas de vitrocerâmicos do sistema Li2O – CaO – SiO2
(Universidade Federal de São Carlos, 2013-03-12)
An interesting characteristic of the Li2O-CaO-SiO2 glass-forming system is the possibility of obtaining certain crystalline phases and morphologies that may lead to tough glass-ceramics. However, very few published works ...
Influência da microestrutura na resistência mecânica de ligas hipereutéticas Al-Si solidificadas direcionalmente
(Universidade Federal de São Carlos, 2017-01-18)
The present research work deals with directional solidification (DS) of Al-15wt.% and 18wt.% Si alloys and further characterization of the related microstructures. Emphasis is given on the eutectic growth being affected ...
Avaliação do comportamento mecânico de nanocompósito de PEEK/nHA sob curta e longa duração para aplicação como biomaterial
(Universidade Federal de São Carlos, 2012-04-27)
The main objectives of this dissertation were to study the short (tensile and impact) and long-term (fatigue) mechanical behavior of nanocomposites of poly(ether-ether-ketone), PEEK, with nanohydroxyapatite, nHA, for ...