I. Gutiérrez

Centro de Estudios e Investigaciones Técnicas de Gipuzkoa

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A. Iza-Mendia

Centro de Estudios e Investigaciones Técnicas de Gipuzkoa

D. Jorge-Badiola

Centro de Estudios e Investigaciones Técnicas de Gipuzkoa

J. J. Urcola

Universidad de Alcalá

A. Martínez-de-Guerenu

Centro de Estudios e Investigaciones Técnicas de Gipuzkoa

Beatriz López

Centro Universitario de Occidente

E. Novillo

Universidad de Navarra

J. J. Urcola

Universidad de Navarra

I. Madariaga

Centro de Estudios e Investigaciones Técnicas de Gipuzkoa

J.M. Rodríguez-Ibabe

Centro de Estudios e Investigaciones Técnicas de Gipuzkoa

M. Díaz-Fuentes

Centre for Electrochemical Technologies

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Centro de Estudios e Investigaciones Técnicas de Gipuzkoa

Universidad de Navarra

Consejo Superior de Investigaciones Científicas

Tata Steel (Netherlands)

Cenim - Centro Nacional de Investigaciones Metalurgicas

Universidad Complutense de Madrid

Centre National de la Recherche Scientifique

Delft University of Technology

Tata Steel (India)

Japan External Trade Organization

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NOMBRAMIENTOS DE DIRECTORES EN PLANTELES 6 Y 7 DE LA ENP

Gaceta UNAM (1990-1999) (1994)

I. Gutiérrez Esther Romero Gómez Jorge Rubio

LA BIOLOGA ISABEL GUTIERREZ FUSTER Y EL INGENIERO JORGE RUBIO ROMERO TOMARON PROTESTA COMO DIRECTORES AUXILIARES DE LOS PLANTELES 6 ANTONIO CASO Y 7 EZEQUIEL A. CHAVEZ DE LA ESCUELA NACIONAL PREPARATORIA (ENP), RESPECTIVAMENTE, PARA EL PERIODO 1994-1998.

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De polémicas y apologías: el debate sobre el progreso de la España en las respuestas a Masson de Morvilliers y la historiografía ilustrada

Dieciocho (2021)

I. Gutiérrez

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Improvement of hot rolled products by physical and mathematical modelling.

A.A. Howe Ettore Anelli H. K. D. H. Bhadeshia C. Garcı́a de Andrés I. Gutiérrez

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Upper acicular ferrite formation in a medium-carbon microalloyed steel by isothermal transformation: Nucleation enhancement by CuS

Metallurgical and Materials Transactions A (1998)

I. Madariaga J. L. Romero I. Gutiérrez

Acicular ferrite

Beta ferrite

Isothermal transformation diagram

Isothermal process

Acicular

Microalloyed steel

Volume fraction

10.1007/s11661-998-0292-x

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Citations (4)

Application of Coercive Field Measurements to the Evaluation of Recovery and Recrystallization in Cold Rolled Interstitial Free (IF) Steel

Materials science forum (2005)

A. Martínez-de-Guerenu M. Oyarzabal F. Arizti I. Gutiérrez

Recrystallization (geology)

10.4028/0-87849-981-4.647

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Microstructural Unit Controlling Cleavage Crack Propagation in High Strength Bainitic Steels

Key engineering materials (2014)

Sebastián F. Medina Lucía Rancel Manuel Gómez José-María Cabrera I. Gutiérrez

The strengthening mechanisms which are operative in bainite are very well known: small bainite packet, small width of the laths, dislocation density and size and number of carbide particles (Fe 3 C), among others. Bainite packet size has been traditionally considered as the value measured by optical microscopy (OM), as electron back scattered diffraction (EBSD) technique is relatively recent. In a V-microalloyed steel with bainitic microstructure of C=0.38%, V=0.12% and N= 0.0214% the average length and width of ferrite laths and of cementite carbides were measured. On the other hand, the bainite packet size was measured by OM and EBSD with a misorientation of 15o. These values of the microstructural units have been taken in account to calculate the effective surface energy γ p given by Griffith’s model for cleavage fracture. It was concluded that bainite packet size determined by EBSD with a misorientation angle criterion of 15o was the microstructural parameter that controls cleavage crack propagation. Given the relationship between the average unit crack path (UCP) and the bainite packet size, it was concluded that the effective surface energy of cleavage fracture ( γ p ) would be between 71.6 and 82.6 J m -2 .

Misorientation

Acicular ferrite

Cleavage (geology)

10.4028/www.scientific.net/kem.622-623.846

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Citations (3)

Analysis of ferrite grain growth mechanisms during γ−α transformation in a niobium alloyed steel using EBSD

Materials Science and Engineering A (2004)

E. Novillo D. Hernández I. Gutiérrez Beatriz López

Misorientation

Beta ferrite

10.1016/j.msea.2004.06.067

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Citations (20)

Aspects of orientation-dependent grain growth in extra-low carbon and interstitial-free steels during continuous annealing

Metallurgical and Materials Transactions A (2003)

J. L. Bocos E. Novillo Mathieu Petite A. Iza-Mendia I. Gutiérrez

Recrystallization (geology)

10.1007/s11661-003-0117-x

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Citations (25)

Influence of the Prior Austenite Microstructure on the Transformation Products Obtained for C-Mn-Nb Steels after Continuous Cooling.

ISIJ International (1999)

R. Bengochea Elvis López Bravo I. Gutiérrez

In the present work, the ferrite grain sizes after transformation from non-deformed (recrystallized) and work-hardened austenite have been considered. Two C-Mn-Nb steels have been deformed by multipass torsion tests carried out at temperatures, both above and below the determined Tnr (non-recrystallization temperatures) for these steels. The influence of the prior austenite grain size, the retained strain and the cooling rate on the final ferrite microstructure has been analysed. Austenite grain sizes varying from 28 to 125 μm with retained strains ranging from 0 (non-deformed austenite) to 2 and cooling rates of 1 and 5 s-1 have been considered. It has been observed that higher cooling rates tend to produce acicular microstructures, and that this effect is enhanced at the lower retained strains. It has been shown that the reduction of austenite grain size and an increase of retained strain, provide a higher density of nucleation sites, which leads to a refinement of the ferrite. A similar effect is produced by increasing the cooling rate from 1 to 5 s-1.

Recrystallization (geology)

Acicular ferrite

Continuous cooling transformation

Acicular

10.2355/isijinternational.39.583

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Citations (53)

Effect of microstructure on the impact toughness of Nb-microalloyed steel: Generalisation of existing relations from ferrite–pearlite to high strength microstructures

Materials Science and Engineering A (2013)

I. Gutiérrez

Charpy impact test

Microalloyed steel

10.1016/j.msea.2013.02.006

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Citations (67)