Phases Transformations
Mostrando 1-12 de 52 artigos, teses e dissertações.
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1. ESAÚ E JACOB E MEMORIAL DE AYRES: MANUSCRITOS QUE VIAJAM
Resumo Este artigo examina os manuscritos dos romances Esaú e Jacob (1904) e Memorial de Ayres (1908) de Machado de Assis. Os dois dossiês genéticos são compostos, respectivamente, por 834 e 484 fólios e encontram-se na Academia Brasileira de Letras, no Rio de Janeiro. Com base na tipologia de documentação genética estabelecida por De Biasi (1996), e
Machado Assis Linha. Publicado em: 2019-04
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2. Structural and Magnetic Properties of Duplex Stainless steel (UNS S31803) Powders Obtained by high Energy Milling of Chips with Additions of NbC
In this study, the high energy mechanical milling was utilized to the production of duplex stainless steel powders from the recycling chips with and without the addition niobium carbide. The effect of milling time and addition carbide on the morphology, particle size and magnetic properties of the powders was investigated. The utilization of the powder metal
Mat. Res.. Publicado em: 30/10/2017
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3. Comportamiento reológico del aluminio AA6061 por efecto de las transformaciones de fase activadas térmicamente
ABSTRACT Aluminum alloys at room temperature not experience significant rheological behavior due to its coherent microstructural order, and its high compactness. However, the increase of the temperature generates stress fields, and thereby deformations, that alter the microstructural equilibrium, manifesting the rheological behavior as consequence of the int
Matéria (Rio J.). Publicado em: 22/06/2017
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4. Evolution of Complex Phases in Al-Fe-Si Systems
Phase transformations and composition of Al-Fe-Si, Al-Co-Si and Al-Ni-Si based rapidly quenched ribbons have been investigated. Different Al-Si based alloys with varying Si content and additions of third metallic element, namely Al80Si20, Al60Si40, Al75Fe5Si20, Al70Fe10Si20, Al75Co5Si20, Al70Co10Si20, Al75Ni5Si20, Al70Ni10Si20 were analyzed. Variation of pha
Mat. Res.. Publicado em: 17/11/2015
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5. Effects of Thermal Aging on Microstructure and Corrosion Resistance of AISI 317L Steel Weld Metal in the FSW Process
The AISI 317L grade is an austenitic stainless steel with high Mo content (3.0 wt% min.). Due to the higher pitting resistance, this grade has replaced AISI 316L steel in many applications where the corrosion resistance is a critical property. However, the high Mo can induce phase transformations in high temperature services. In modern oil refinaries and pet
Mat. Res.. Publicado em: 23/10/2015
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6. Thermal Damage in Diamonds: the Protective Effect of Titanium Coating
Many of the applications of diamonds expose them to high temperatures and atmospheres containing oxygen. Under these circumstances two important phenomena responsible for the thermal damage of diamonds are: oxidation and graphitization. It is well known that coatings on diamonds provide a better performance, but the amount of information in literature about
Mat. Res.. Publicado em: 2015-08
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7. Effect of phase transformations on hardness in Zn-Al-Cu Alloys
Sixteen Zn-Al-Cu alloy compositions were prepared by melting pure elements. The as-cast alloys were homogenized at 350 °C for 180 h. Both the as-cast and homogenized alloys were analyzed with X-ray diffractometer and EDX-scanning electron microscope. The Rockwell “B” hardness of both the as-cast and homogenized alloys was determined using the standard p
Mat. Res.. Publicado em: 22/09/2014
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8. Corrosion and microstructural characterization of martensitic stainless steels submitted to industrial thermal processes for use in surgical tools
INTRODUCTION: The mechanical properties and corrosion resistance of a material are dependent on its microstructure and can be modified by phase transformation. When a phase transformation occurs in a material it usually forms at least one new phase, with physical-chemical characteristics that differ from the original phase. Moreover, most phase transformatio
Rev. Bras. Eng. Bioméd.. Publicado em: 2014-09
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9. Influence of the microstructure on the degree of sensitization of a duplex stainless steel UNS S31803 aged at 650ºC
This work evaluates the phase transformations during aging of an UNS S31803 DSS at 650ºC and its influence on the DOS. The material was solution treated at 1175ºC and then aged at 650ºC for times up to 360 h. SEM-BSC images indicate the formation of Cr2N, σ and χ phases in the samples aged at 650ºC. The analysis of DL-EPR curves, obtained in a 1 M H2SO
Mat. Res.. Publicado em: 02/08/2013
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10. Stability of an amorphous alloy of the Mm-Al-Ni-Cu system
An investigation was made of the stability of melt-spun ribbons of Mm55Al25Ni10Cu10 (Mm = Mischmetal) amorphous alloy. The structural transformations that occurred during heating were studied using a combination of X-ray diffraction (XRD) and differential scanning calorimetry (DSC). Crystallization took place through a multi-stage process. The first stage of
Mat. Res.. Publicado em: 30/08/2012
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11. Análise do processo de coaching na carreira de executivos do Vale do Paraíba paulista / Coaching process analysis on the Executive career in Paraíba paulista valley
Procedures for leadership skills developing pass through constant transformations of approaches and methodologies. Many companies, as a way to develop their leaders have implemented coaching programs for their executives, not only to them have ownership of new mental models, as well as consolidate and develop behavioral skills and techniques to current and f
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/04/2011
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12. Reformas institucionales e integración global la intervención del Banco Mundial en Argentina durante los '90
The process of economic and institutional reform that was carried out in Argentina over the decade of the nineties led to deep transformations in the country's economic structure, State forms, action and configurations of its institutional apparatus. In this paper I take a look at World Bank intervention in the different stages of this process, paying partic
Revista de Sociologia e Política. Publicado em: 2009-06