Heat Treatment Of Metals
Mostrando 1-12 de 27 artigos, teses e dissertações.
-
1. Synthesis and characterization of lithiated nanostructures
ABSTRACT Regardless of the simple accumulation of ions in the crystal insertion sites, nanomaterials offer a new storage mechanism of lithium ions (Li+), these storage mechanisms are formed in the interfaces and inside of the nanopores. Such kinds of storage mechanisms have no effect on the structure of the electrode material. Consequently, the charge-discha
Matéria (Rio J.). Publicado em: 19/07/2018
-
2. Obtención de compuesto de titanio con gradiente de porosidad mediante técnica pulvimetalúrgica
ABSTRACT Within the study of biomaterials for implantological use titanium is among the most widely employed metals due to its excellent corrosion and mechanical resistance. In spite of the advances made, there are some issues remaining with the value of the elastic moduli of the titanium (110GPa) in comparison with the elastic moduli of the cortical bone (2
Matéria (Rio J.). Publicado em: 19/07/2018
-
3. Effects of Composition and Thermal Treatment of Cu-Al-Zn Alloys with Low Content of Al on their Shape-memory Properties
Two Cu-Zn-Al alloys with variable content of Zn (25 and 30 wt%) and constant Al content (4 wt%) prepared by induction melting of pure metals and hot rolled into strips of 0.5 mm thickness were thermally processed by using three different heat treatments: direct quenching, step-quenching and up-quenching with boiling water and room temperature water as the qu
Mat. Res.. Publicado em: 07/08/2017
-
4. Effect of heat treatment on hardness and wear behavior of weld deposited Co-Cr-Mo alloy
Metallic materials are generally characterized by the evaluation of hardness and wear resistance of the material at the specified condition. The characterization is necessary for understanding the behavior of the metals, especially alloys, at different conditions. To study the effect of heat treatment on weld deposited Co-Cr-Mo alloy, arc welding process has
Matéria (Rio J.). Publicado em: 2015-06
-
5. Fragilização por hidrogênio de parafusos cementados / Hydrogen embrittlement of carburized bolts
The main aim of this work is to investigate the effects on hydrogen embrittlement of bolts due to acid pickling, baking, and strip processes performed during zinc plating. Carburized bolts type "hexagon flange head tapping screws", with 6 mm of diameter and 16 mm of thread length were organized into 39 different groups. Acid pickling was evaluated using volu
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/07/2011
-
6. Síntese e caracterização da difenil-4-amina sulfonato de cério (III) e sua aplicação como precursor do CeO2
The cerium oxide is a very useful material in a series of processes among which we highlight the automotive catalysts, where it acts as a regulator of oxygen. We studied the synthesis of complex diphenyl-4-amine sulfonate cerium (III) pentahydrate, Ce (C12H10NSO3) 3.5H2O, and its application as a precursor to the oxide CeO2. The complex was synthesized in aq
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/02/2011
-
7. Estudo das características morfológicas texturais e estruturais dos catalisadores automotivos, síntese e caracterização de filmes alternativos
The structural, morphological and textural changes of new and used automotive catalysts heated at temperatures between 500 and 1000°C were investigated. The catalysts were thermally characterized on simultaneous thermogravimetric and differential thermal analysis (TG-DTA) equipment performed in air and N2. Morphological changes were observed by scanning ele
Publicado em: 2010
-
8. Estudo comparativo da estampabilidade da liga de aluminio AA1050 partindo de placas obtidas por vazamento direto e bobinas obtidas por vazamento contínuo. / Comparative study of the deep drawing alloy AA1050 from plates obtained by direct casting and coils obtained by continuos casting.
Stampability of aluminum alloys is a subject of interest to several industrial sectors because they are largely used in the fabrication of several parts and components. The choice is based upon the stampability and the relative manufacturing capability in relation to other aluminum alloys that contain larger amounts of alloying elements and, consequently, hi
Publicado em: 2010
-
9. Modificações da Celulose Kraft Branqueada de Eucalipto por Tratamento Térmico e de Radiação Ultravioleta
Cellulose is used like raw material on many products, it may be found in native form (cellulose I) or on its modified forms (cellulose II, III1, III2, IV1, and IV2). Cellulose is obtained by many processes and raw materials being, alkaline pulping of woods (hardwood/softwood) is most frequent. In time function cellulose products are modified since hydrolysis
Publicado em: 2009
-
10. Effect of induction heating on steel seamless tubes used in diesel enginers / Efeito do aquecimento por indução eletromagnetica de tubos sem costura utilizados em motores a diesel
This paper presents a study about the effect of cold upsetting and electromagnetic induction heating on microstructure and hardness characteristics of steel seamles pipe. This pipe studied is applied in fuel flow transport of high pressure fuel system. As fuel is transported the pipe sealing characteristic is critical on assembly interfaces of this pipe. Thi
Publicado em: 2009
-
11. IMPLEMENTAÇÃO DA TÉCNICA DE FOTOACÚSTICA DE CÉLULA ABERTA PARA OBTENÇÃO DA DIFUSIVIDADE TÉRMICA DE METAIS
The photo-acoustic technique has become a standard photo-thermal method for carrying out diverse studies on solids materials. Photo-thermal phenomena in solids results from a combination of thermal expansion, thermal diffusion, and thermo-elastic bending effects and can be obtained by c k . r a = where k is the thermal conductivity, r is the density, and c i
Publicado em: 2009
-
12. Microstructural development and tensile strength of an ECAP: deformed Al-4 wt. (%) Cu alloy
The tensile strength of metals and alloys can be considerably increased by severe plastic deformation, a consequence of the extreme grain refinement thus achieved. In the present work the deformation was performed by Equal Channel Angular Pressing and the material was an Al-4% Cu alloy. Characterization included tensile tests, and microstructural observation
Materials Research. Publicado em: 2008-06