Cct Diagram
Mostrando 1-5 de 5 artigos, teses e dissertações.
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1. Characterization of Phase Transformations and Microstructural Changes in an API 5CT L80 Steel Grade During Ni Alloy Laser Cladding
The superficial coatings in micro-alloyed steel pipes has been a pointed way to decrease the corrosion problems in oil and gas industry. However, little emphasis has been given to the substrate. The effects of the deposition method on the steel microstructure and properties are still not well described. In this context, this work studied the effect of Ni sup
Mat. Res.. Publicado em: 26/07/2018
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2. Numerical Predictions for the Thermal History, Microstructure and Hardness Distributions at the HAZ during Welding of Low Alloy Steels
A phenomenological model to predict the multiphase diffusional decomposition of the austenite in low-alloy hypoeutectoid steels was adapted for welding conditions. The kinetics of phase transformations coupled with the heat transfer phenomena was numerically implemented using the Finite Volume Method (FVM) in a computational code. The model was applied to si
Mat. Res.. Publicado em: 05/04/2016
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3. Microstructural characterization of a plate of microalloyed pipeline steel that conforms to API 5L X65 in different regions of the plate as rolled and after austenitization and continous cooling under different cooling rates. / Caracterização microestrutural do aço para tubo API 5L-X65 em diferentes regiões da chapa como laminada e após austenitização e resfriamento sob diversas taxas de resfriamento.
This work aims to characterize and compare the microstructures of different regions of a plate of microalloyed pipeline steel that conforms to API 5L X65, employed in the transportation of natural gas and oil, as received and after being subjected to heat treatments of austenitization and continuous cooling under different cooling rates. The steel under stud
Publicado em: 2009
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4. Metodologia para uso de simulação física no estudo da ZAC e na obtenção de diagramas CCT para soldagem / The Use of Physical Simulation on HAZ Study and CCT Diagram Attainment Dedicated to Welding
The joining of metals is often associated to metallurgical problems. Specifically, metallurgical transformations in the HAZ (Heat Affected Zone) can occur, what lead to undesirable microestructural changes. The HAZ is a difficult region for studying due to its small dimensions and high thermal gradientes. Thus, in order to overcome this limitation of the HAZ
Publicado em: 2008
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5. Plastic behavior of medium carbon vanadium microalloyed steel at temperatures near gamma <-> alpha transformation
Dilatometric techniques were used to build the continuous cooling transformation (CCT) diagram for a medium carbon microalloyed steel; the microstructure and hardness were determined at different cooling rates. The mechanical behavior of the steel in the austenite field and at temperatures approaching austenite to ferrite transformation was measured by means
Materials Research. Publicado em: 2001-07