The Effect of Second Phase Particles on the Tensile Properties of Ferritic Iron at Low Temperature

Hamano, Ryuichi; Tsuya, Kazuo

doi:10.2355/tetsutohagane1955.64.1_105

Cited by 4 publications

(3 citation statements)

References 8 publications

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“…9). This type of precipitation has been observed in steels containing molybdenum, 72,81 chromium 82 copper 83 and silver, 84 as well as the main microalloying elements, niobium, [85][86][87][88] vanadium 75,76,80,[89][90][91] and titanium, 92 and has been reviewed in detail by Edmonds and Honeycombe. 53 In many vanadium steels which have undergone isothermal transformation, interphase precipitation shows a random arrangement of individual particles within a sheet formed parallel to the c/s interface by repeated nucleation, as the transformation front moves through austenite.…”

Section: Interphase Precipitation (Planar or Curved)mentioning

confidence: 95%

Processes, microstructure and properties of vanadium microalloyed steels

Baker

2009

Materials Science and Technology

239

111

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Vanadium as an important alloying element in steels was initially associated with the properties achieved following tempering. Interest in the microstructure was stimulated by the advent of transmission electron microscopes with a resolution of y1 nm together with selected area electron diffraction techniques. A second timely development was that of controlled rolling, particularly of plate and sheet products. The scope of this review will include the historical background on quenched and tempered vanadium steels, precipitation during isothermal aging, conventional controlled rolling and during thin slab direct charging and the development of strength and toughness in vanadium microalloyed steels. The characterisation of microstructure, in particular the methods for the analysis of the chemical composition of precipitates has progressed since the availability of X-ray energy dispersive analysis in the 1970s, and the role played by electron energy loss spectroscopy in providing quantitative analysis of carbon and nitrogen in vanadium microalloyed steels will be presented. There are still many topics involving vanadium microalloyed steels that are controversial. These include the nucleation sequence of homogeneous precipitates of vanadium carbonitride and whether this occurs coherently, the composition of the vanadium precipitates, the nucleation mechanism for interphase precipitation, the importance of strain induced precipitation in austenite of vanadium carbonitride, the contributions of both interphase precipitation and random precipitation in ferrite to the yield strength, and the role of the process route parameters in developing properties. These topics will be considered in this paper which concentrates on hot rolled vanadium microalloyed steels placed in the context of pertinent research on other alloys.

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Section: Interphase Precipitation (Planar or Curved)mentioning

confidence: 95%

Processes, microstructure and properties of vanadium microalloyed steels

Baker

2009

Materials Science and Technology

239

111

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“…Normally, particle stoichiometry has also been assumed. Gladman et al 3,4 found a satisfactory agreement between the values of s p estimated using the Ashby-Orowan approach, 1,2 substituting their experimental data for r and f, 3 and the indirect approach based on the Hall-Petch relationship. 5,6 Usually, dislocation strengthening s d was either ignored or considered to be low and was assumed to be included in s p .…”

Section: Introductionmentioning

confidence: 91%

Dispersion strengthening in vanadium microalloyed steels processed by simulated thin slab casting and direct charging Part 1 – Processing parameters, mechanical properties and microstructure

Li¹,

Wilson²,

Craven³

et al. 2007

Materials Science and Technology

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This version is available at https://strathprints.strath.ac.uk/5778/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge.Any correspondence concerning this service should be sent to the Strathprints administrator: strathprints@strath.ac.ukThe Strathprints institutional repository (https://strathprints.strath.ac.uk) is a digital archive of University of Strathclyde research outputs. It has been developed to disseminate open access research outputs, expose data about those outputs, and enable the management and persistent access to Strathclyde's intellectual output.

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“…5 compares the experimentally determined transition temperature [17] and the values obtained with the proposed formulation. It should be highlighted that data from all the different microstructures generated in this work and others [15,27] have been treated together with the same type of formulation. From the figure it can be concluded that Eq.…”

Section: Thermec 2013mentioning

confidence: 99%

Microstructure-Mechanical Properties Relationships for Complex Microstructures in High Strength Steels

Iza-Mendia

Gutiérrez

2014

MSF

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Due to the increased complexity of steel microstructures, when considering the application of available Hall-Petch type equations for yield strength prediction, a number of difficulties raises. For example, the correlation between grain size measurements by EBSD technique and optical microscopy (OP) in complex microstructures is required in order to integrate data to the traditional equations developed for OP results and ferrite-pearlite microstructures. Besides, the introduction of some additional terms to the equations to account for precipitation, C in solution and forest dislocation contributions presents some difficulties that need to be overcome to improve prediction accuracy. Different microstructures (ferrite-pearlite, bainite, quenched and Q&T) have been produced by thermal and thermomechanical treatments, followed by microstructural characterisation and mechanical testing. A Hall-Petch coefficient dependent on the boundary misorientation distribution is proposed. This approach allows dealing in a similar way ferritic, bainitic and martensitic microstructures. The Hall-Petch coefficient, thus defined, corresponds to the previously proposed by Pickering for ferrite, while bainitic microstructures give a smaller value. Additionally, the equation used to express the fracture appearance transition temperature of ferritic-pearlitic microstructure has been generalized from the developments made in the calculation of the yield stress.

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The Effect of Second Phase Particles on the Tensile Properties of Ferritic Iron at Low Temperature

Cited by 4 publications

References 8 publications

Processes, microstructure and properties of vanadium microalloyed steels

Processes, microstructure and properties of vanadium microalloyed steels

Dispersion strengthening in vanadium microalloyed steels processed by simulated thin slab casting and direct charging Part 1 – Processing parameters, mechanical properties and microstructure

Microstructure-Mechanical Properties Relationships for Complex Microstructures in High Strength Steels

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