Effect of ausforming on the bainitic transformation in medium carbon steels

Eres-Castellanos, Adriana (2018). Effect of ausforming on the bainitic transformation in medium carbon steels. Thesis (Master thesis), E.T.S.I. Caminos, Canales y Puertos (UPM).

Description

Title: Effect of ausforming on the bainitic transformation in medium carbon steels
Author/s:
  • Eres-Castellanos, Adriana
Contributor/s:
  • Garcia-Mateo, Carlos
  • García Caballero, Francisca
  • Gálvez Diaz-Rubio, Francisco
Item Type: Thesis (Master thesis)
Date: 2018
Subjects:
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Ciencia de los Materiales
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The best contribution to the strength of bainitic microstructures is due to the scale of the bainitic ferrite plates. In order to improve this strength, it is important to understand and control the parameters that define the final bainitic microstructure. Among them, the strength of the austenite from where the bainite grows and the driving force of the transformation are the most influential parameters. Historically, controlling the transformation temperature and the chemical composition has been the common way of increasing both, the strength of the austenite and the driving force of the transformation. Recently, the viability of increasing both magnitudes has been tested by a process called ausforming, that consists on applying plastic deformation prior to the transformation, obtaining in this way not only thinner bainitic ferrite plates, but also an acceleration of the bainitic transformation. In this project the viability of this thermomechanical treatment and the influence of the parameters that define it (deformation, deformation temperature and transformation temperature) on the bainitic transformation will be tested. ------------------RESUMEN------------------------ La mayor aportación a la resistencia de las microestructuras bainíticas viene del tamaño de las placas de ferrita. Cualquier mejora de la misma pasa por tanto por el conocimiento y el control de los parámetros que definen la escala final de la microestructura bainítica, entre ellos la resistencia de la austenita a través de la cual crece la ferrita bainítica y la fuerza motriz de la transformación, directamente relacionados con la temperatura de transformación y la composición química del material. Recientemente, se ha comprobado que la aplicación de deformación plástica previa a la transformación, ausforming, permite conseguir de esta manera no solo placas de ferrita bainítica más delgadas, sino también una aceleración de la transformación bainítica. En este trabajo se comprobará la viabilidad de este tratamiento termomecánico, y la influencia que los parámetros que lo definen (deformación, temperatura de deformación y de transformación), tienen en la transformación bainítica.

More information

Item ID: 56429
DC Identifier: http://oa.upm.es/56429/
OAI Identifier: oai:oa.upm.es:56429
Deposited by: Adriana Eres Castellanos
Deposited on: 13 Sep 2019 07:15
Last Modified: 13 Sep 2019 07:15
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