Trip Steels
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. Effect Of The Application Of Constant And Variable Temperatures at the Overaging Stage in the Mechanical Properties of Trip780 Steel
The effect of the application of constant temperatures (isothermal plateau) and variables (cooling ramp) during the overaging (OA) stage of the continuous annealing cycle in the microstructural characteristics and mechanical properties of a TRIP steel of the class of 780 MPa was investigated. It was simulated six overaging conditions in the equipment Gleeble
Mat. Res.. Publicado em: 15/07/2019
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2. 3D Microstructural Finite Element Simulation of Martensitic Transformation of TRIP Steels
Abstract In this paper the effects of deformation modes on martensitic transformation for TRIP steels which are composed of Ferrite, Bainite and Retained austenite are investigated in the view of the microstructural level. For this porpose the simulations are run for a synthetically generated microstructure which have 55% Ferrit, 35% Bainite and 10% Retained
Lat. Am. j. solids struct.. Publicado em: 30/07/2018
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3. Determinación de los parámetros de austenización intercrítica para el desarrollo de aceros multifásicos mediante análisis dilatométrico
ABSTRACT The Multiphase steels are materials with exceptional mechanical properties including high strength, excellent ductility and hardening coefficient and good conformability. These properties are related with the microstructure, which can be a combination of ferrite and martensite (Dual phase steels) or more complex microstructures with ferrite, bainite
Matéria (Rio J.). Publicado em: 19/07/2018
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4. Estabilidad de la austenita retenida bajo condiciones de deformación en aceros multifásicos con bainita nanoestructurada
ABSTRACT A steel with nominal composition 0.25C, 1.9Si, 0.63Mn, 1.5Cr was manufactured using an induction furnace. The as-cast alloy was homogenized and the temperatures of austenite start (AC1) and finish (AC3) during heating were determined by dilatometric analyses. Two intercritical austenitization temperatures were selected, which were used to perform pa
Matéria (Rio J.). Publicado em: 19/07/2018
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5. The Influence of Sample Preparation on the Quantitative Analysis of the Volume Fraction of Martensite Formed in a 304l Trip Steel
The metastable 304L austenitic stainless steels are susceptible to phase transformation induced by plastic deformation. The traditional metallographic preparation, via mechanical methods, introduces superficial plastic deformation from grinding and polishing. It is important to evaluate this effect on the results of quantitative analysis of martensite formed
Mat. Res.. Publicado em: 23/10/2015
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6. Microstructural characterization and mechanical behavior of a low-carbon 17%Mn steel
Steels containing high levels of Mn, Si and Al exhibit high plasticity when deformed, owing to twinning-induced plastitity (TWIP) and transformation-induced plasticity (TRIP) effects. In this study, we investigated the microstructural evolution of samples of samples of a 17%Mn steel subjected to war rolling at 700º and 800ºC. We also studied the effects of
Mat. Res.. Publicado em: 27/05/2014
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7. ESTUDO EXPLORATÓRIO DA SOLDAGEM POR FRICÇÃO E MISTURA MECÂNICA DE UM AÇO TRIP 800 / EXPLORATORY STUDY OF A TRIP 800 FRICTION SITR SPOT WELDING
Advanced high strength steels (AHSS) are being developed and are being used for the automotive industry due to their exceptional combination of high strength and ductility, which leads to cost and weight savings and better safety. Friction Stir Spot Welding (FSSW) is a novel variant of Friction Stir Welding (FSW), which is a solid-state joining process witho
Publicado em: 2008
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8. QUENCHING AND PARTITIONING OF NI-ADDED HIGH STRENGTH STEELS: KINETICS MODELLING MICROSTRUCTURE AND MECHANICAL PROPERTIES / TÊMPERA E PARTIÇÃO EM AÇOS DE ALTA RESISTÊNCIA CONTENDO NI: MODELAGEM CINÉTICA, MICROESTRUTURA E PROPRIEDADES MECÂNICAS
Aços de alta resistência contendo frações significativas de austenita retida têm alcançado grande interesse comercial principalmente quando associados ao fenômeno TRIP durante o processo de conformação final. Recentemente, um novo conceito de tratamento térmico, denominado Têmpera e Partição, vem sendo estudado como mais uma alternativa no desen
Publicado em: 2007
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9. The "quenching and partitioning" process: background and recent progress
A new process concept, "quenching and partitioning" (Q&P) has been proposed recently for creating steel microstructures with retained austenite. The process involves quenching austenite below the martensite-start temperature, followed by a partitioning treatment to enrich the remaining austenite with carbon, thereby stabilizing it to room temperature. The pr
Materials Research. Publicado em: 2005-12
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10. Estudo das transformações de fase de aços TRIP ao Si-Mn microligados com Nb. / Phase transformations study on Nb microalloyed Mn - Si TRIP steels.
The phase transformation kinetics of five Nb microalloyed Si-Mn TRIP steels was studied under continuous cooling and isothermal treatments, using dilatometric techniques, morphologic characterization, Thermocalc computational thermodynamics and Dictra numerical simulation. WDS and EDS X-ray microanalysis and Dictra numerical modeling of C, Mn and Si distribu
Publicado em: 2003